NaYF4 crystallizes in the triclinic P1 space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to one F(1), one F(11), one F(4), one F(5), one F(7), and one F(9) atom. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one F(10), one F(12), one F(2), one F(3), one F(6), and one F(8) atom. In the third Na site, Na(3) is bonded in a 9-coordinate geometry to one F(1), one F(11), one F(2), one F(3), one F(4), one F(5), one F(6), one F(8), and one F(9) atom. There are three inequivalent Y sites. In the first Y site, Y(1) is bonded in a 9-coordinate geometry to one F(1), one F(10), one F(11), one F(12), one F(4), one F(6), one F(7), one F(8), and one F(9) atom. In the second Y site, Y(2) is bonded in a 9-coordinate geometry to one F(10), one F(11), one F(12), one F(2), one F(3), one F(5), one F(7), one F(8), and one F(9) atom. In the third Y site, Y(3) is bonded in a 9-coordinate geometry to one F(1), one F(10), one F(12), one F(2), one F(3), one F(4), one F(5), one F(6), and one F(7) atom. There are twelve inequivalent F sites. In the first F site, F(1) is bonded to one Na(1), one Na(3), one Y(1), and one Y(3) atom to form distorted FNa2Y2 trigonal pyramids that share  a cornercorner with one F(11)Na2Y2 tetrahedra,  a cornercorner with one F(5)Na2Y2 tetrahedra,  a cornercorner with one F(9)Na2Y2 tetrahedra,  a cornercorner with one F(7)NaY3 tetrahedra, corners with two equivalent F(2)Na2Y2 tetrahedra, corners with two equivalent F(8)Na2Y2 tetrahedra, corners with two equivalent F(12)NaY3 tetrahedra, corners with three equivalent F(6)Na2Y2 tetrahedra, corners with four equivalent F(4)Na2Y2 tetrahedra,  an edgeedge with one F(11)Na2Y2 tetrahedra,  an edgeedge with one F(3)Na2Y2 tetrahedra,  an edgeedge with one F(5)Na2Y2 tetrahedra,  an edgeedge with one F(9)Na2Y2 tetrahedra,  an edgeedge with one F(10)NaY3 tetrahedra, and  an edgeedge with one F(7)NaY3 tetrahedra. In the second F site, F(2) is bonded to one Na(2), one Na(3), one Y(2), and one Y(3) atom to form FNa2Y2 tetrahedra that share  a cornercorner with one F(6)Na2Y2 tetrahedra,  a cornercorner with one F(8)Na2Y2 tetrahedra,  a cornercorner with one F(10)NaY3 tetrahedra,  a cornercorner with one F(12)NaY3 tetrahedra, corners with two equivalent F(11)Na2Y2 tetrahedra, corners with two equivalent F(7)NaY3 tetrahedra, corners with three equivalent F(5)Na2Y2 tetrahedra, corners with four equivalent F(3)Na2Y2 tetrahedra, corners with two equivalent F(1)Na2Y2 trigonal pyramids,  an edgeedge with one F(4)Na2Y2 tetrahedra,  an edgeedge with one F(6)Na2Y2 tetrahedra,  an edgeedge with one F(8)Na2Y2 tetrahedra,  an edgeedge with one F(9)Na2Y2 tetrahedra,  an edgeedge with one F(10)NaY3 tetrahedra, and  an edgeedge with one F(12)NaY3 tetrahedra. In the third F site, F(3) is bonded to one Na(2), one Na(3), one Y(2), and one Y(3) atom to form distorted FNa2Y2 tetrahedra that share  a cornercorner with one F(5)Na2Y2 tetrahedra,  a cornercorner with one F(8)Na2Y2 tetrahedra,  a cornercorner with one F(10)NaY3 tetrahedra,  a cornercorner with one F(12)NaY3 tetrahedra, corners with two equivalent F(4)Na2Y2 tetrahedra, corners with two equivalent F(9)Na2Y2 tetrahedra, corners with two equivalent F(7)NaY3 tetrahedra, corners with three equivalent F(6)Na2Y2 tetrahedra, corners with four equivalent F(2)Na2Y2 tetrahedra,  an edgeedge with one F(11)Na2Y2 tetrahedra,  an edgeedge with one F(5)Na2Y2 tetrahedra,  an edgeedge with one F(8)Na2Y2 tetrahedra,  an edgeedge with one F(10)NaY3 tetrahedra,  an edgeedge with one F(12)NaY3 tetrahedra, and  an edgeedge with one F(1)Na2Y2 trigonal pyramid. In the fourth F site, F(4) is bonded to one Na(1), one Na(3), one Y(1), and one Y(3) atom to form FNa2Y2 tetrahedra that share  a cornercorner with one F(11)Na2Y2 tetrahedra,  a cornercorner with one F(6)Na2Y2 tetrahedra,  a cornercorner with one F(9)Na2Y2 tetrahedra,  a cornercorner with one F(7)NaY3 tetrahedra, corners with two equivalent F(3)Na2Y2 tetrahedra, corners with two equivalent F(8)Na2Y2 tetrahedra, corners with two equivalent F(10)NaY3 tetrahedra, corners with three equivalent F(5)Na2Y2 tetrahedra, corners with four equivalent F(1)Na2Y2 trigonal pyramids,  an edgeedge with one F(11)Na2Y2 tetrahedra,  an edgeedge with one F(2)Na2Y2 tetrahedra,  an edgeedge with one F(6)Na2Y2 tetrahedra,  an edgeedge with one F(9)Na2Y2 tetrahedra,  an edgeedge with one F(12)NaY3 tetrahedra, and  an edgeedge with one F(7)NaY3 tetrahedra. In the fifth F site, F(5) is bonded to one Na(1), one Na(3), one Y(2), and one Y(3) atom to form distorted FNa2Y2 tetrahedra that share  a cornercorner with one F(11)Na2Y2 tetrahedra,  a cornercorner with one F(3)Na2Y2 tetrahedra,  a cornercorner with one F(9)Na2Y2 tetrahedra,  a cornercorner with one F(7)NaY3 tetrahedra, corners with two equivalent F(6)Na2Y2 tetrahedra, corners with two equivalent F(10)NaY3 tetrahedra, corners with two equivalent F(12)NaY3 tetrahedra, corners with three equivalent F(2)Na2Y2 tetrahedra, corners with three equivalent F(4)Na2Y2 tetrahedra,  a cornercorner with one F(1)Na2Y2 trigonal pyramid,  an edgeedge with one F(11)Na2Y2 tetrahedra,  an edgeedge with one F(3)Na2Y2 tetrahedra,  an edgeedge with one F(8)Na2Y2 tetrahedra,  an edgeedge with one F(9)Na2Y2 tetrahedra,  an edgeedge with one F(7)NaY3 tetrahedra, and  an edgeedge with one F(1)Na2Y2 trigonal pyramid. In the sixth F site, F(6) is bonded to one Na(2), one Na(3), one Y(1), and one Y(3) atom to form FNa2Y2 tetrahedra that share  a cornercorner with one F(2)Na2Y2 tetrahedra,  a cornercorner with one F(4)Na2Y2 tetrahedra,  a cornercorner with one F(8)Na2Y2 tetrahedra,  a cornercorner with one F(10)NaY3 tetrahedra,  a cornercorner with one F(12)NaY3 tetrahedra, corners with two equivalent F(11)Na2Y2 tetrahedra, corners with two equivalent F(5)Na2Y2 tetrahedra, corners with two equivalent F(9)Na2Y2 tetrahedra, corners with three equivalent F(3)Na2Y2 tetrahedra, corners with three equivalent F(1)Na2Y2 trigonal pyramids,  an edgeedge with one F(2)Na2Y2 tetrahedra,  an edgeedge with one F(4)Na2Y2 tetrahedra,  an edgeedge with one F(8)Na2Y2 tetrahedra,  an edgeedge with one F(10)NaY3 tetrahedra,  an edgeedge with one F(12)NaY3 tetrahedra, and  an edgeedge with one F(7)NaY3 tetrahedra. In the seventh F site, F(7) is bonded to one Na(1), one Y(1), one Y(2), and one Y(3) atom to form FNaY3 tetrahedra that share  a cornercorner with one F(4)Na2Y2 tetrahedra,  a cornercorner with one F(5)Na2Y2 tetrahedra,  a cornercorner with one F(9)Na2Y2 tetrahedra,  a cornercorner with one F(12)NaY3 tetrahedra, corners with two equivalent F(2)Na2Y2 tetrahedra, corners with two equivalent F(3)Na2Y2 tetrahedra, corners with two equivalent F(8)Na2Y2 tetrahedra, corners with three equivalent F(11)Na2Y2 tetrahedra, corners with three equivalent F(10)NaY3 tetrahedra,  a cornercorner with one F(1)Na2Y2 trigonal pyramid,  an edgeedge with one F(4)Na2Y2 tetrahedra,  an edgeedge with one F(5)Na2Y2 tetrahedra,  an edgeedge with one F(6)Na2Y2 tetrahedra,  an edgeedge with one F(9)Na2Y2 tetrahedra,  an edgeedge with one F(12)NaY3 tetrahedra, and  an edgeedge with one F(1)Na2Y2 trigonal pyramid. In the eighth F site, F(8) is bonded to one Na(2), one Na(3), one Y(1), and one Y(2) atom to form FNa2Y2 tetrahedra that share  a cornercorner with one F(11)Na2Y2 tetrahedra,  a cornercorner with one F(2)Na2Y2 tetrahedra,  a cornercorner with one F(3)Na2Y2 tetrahedra,  a cornercorner with one F(6)Na2Y2 tetrahedra,  a cornercorner with one F(10)NaY3 tetrahedra, corners with two equivalent F(4)Na2Y2 tetrahedra, corners with two equivalent F(7)NaY3 tetrahedra, corners with three equivalent F(9)Na2Y2 tetrahedra, corners with three equivalent F(12)NaY3 tetrahedra, corners with two equivalent F(1)Na2Y2 trigonal pyramids,  an edgeedge with one F(11)Na2Y2 tetrahedra,  an edgeedge with one F(2)Na2Y2 tetrahedra,  an edgeedge with one F(3)Na2Y2 tetrahedra,  an edgeedge with one F(5)Na2Y2 tetrahedra,  an edgeedge with one F(6)Na2Y2 tetrahedra, and  an edgeedge with one F(10)NaY3 tetrahedra. In the ninth F site, F(9) is bonded to one Na(1), one Na(3), one Y(1), and one Y(2) atom to form FNa2Y2 tetrahedra that share  a cornercorner with one F(4)Na2Y2 tetrahedra,  a cornercorner with one F(5)Na2Y2 tetrahedra,  a cornercorner with one F(7)NaY3 tetrahedra, corners with two equivalent F(3)Na2Y2 tetrahedra, corners with two equivalent F(6)Na2Y2 tetrahedra, corners with two equivalent F(10)NaY3 tetrahedra, corners with three equivalent F(8)Na2Y2 tetrahedra, corners with four equivalent F(11)Na2Y2 tetrahedra,  a cornercorner with one F(1)Na2Y2 trigonal pyramid,  an edgeedge with one F(2)Na2Y2 tetrahedra,  an edgeedge with one F(4)Na2Y2 tetrahedra,  an edgeedge with one F(5)Na2Y2 tetrahedra,  an edgeedge with one F(12)NaY3 tetrahedra,  an edgeedge with one F(7)NaY3 tetrahedra, and  an edgeedge with one F(1)Na2Y2 trigonal pyramid. In the tenth F site, F(10) is bonded to one Na(2), one Y(1), one Y(2), and one Y(3) atom to form FNaY3 tetrahedra that share  a cornercorner with one F(2)Na2Y2 tetrahedra,  a cornercorner with one F(3)Na2Y2 tetrahedra,  a cornercorner with one F(6)Na2Y2 tetrahedra,  a cornercorner with one F(8)Na2Y2 tetrahedra, corners with two equivalent F(4)Na2Y2 tetrahedra, corners with two equivalent F(5)Na2Y2 tetrahedra, corners with two equivalent F(9)Na2Y2 tetrahedra, corners with three equivalent F(7)NaY3 tetrahedra, corners with four equivalent F(12)NaY3 tetrahedra,  an edgeedge with one F(11)Na2Y2 tetrahedra,  an edgeedge with one F(2)Na2Y2 tetrahedra,  an edgeedge with one F(3)Na2Y2 tetrahedra,  an edgeedge with one F(6)Na2Y2 tetrahedra,  an edgeedge with one F(8)Na2Y2 tetrahedra, and  an edgeedge with one F(1)Na2Y2 trigonal pyramid. In the eleventh F site, F(11) is bonded to one Na(1), one Na(3), one Y(1), and one Y(2) atom to form FNa2Y2 tetrahedra that share  a cornercorner with one F(4)Na2Y2 tetrahedra,  a cornercorner with one F(5)Na2Y2 tetrahedra,  a cornercorner with one F(8)Na2Y2 tetrahedra, corners with two equivalent F(2)Na2Y2 tetrahedra, corners with two equivalent F(6)Na2Y2 tetrahedra, corners with two equivalent F(12)NaY3 tetrahedra, corners with three equivalent F(7)NaY3 tetrahedra, corners with four equivalent F(9)Na2Y2 tetrahedra,  a cornercorner with one F(1)Na2Y2 trigonal pyramid,  an edgeedge with one F(3)Na2Y2 tetrahedra,  an edgeedge with one F(4)Na2Y2 tetrahedra,  an edgeedge with one F(5)Na2Y2 tetrahedra,  an edgeedge with one F(8)Na2Y2 tetrahedra,  an edgeedge with one F(10)NaY3 tetrahedra, and  an edgeedge with one F(1)Na2Y2 trigonal pyramid. In the twelfth F site, F(12) is bonded to one Na(2), one Y(1), one Y(2), and one Y(3) atom to form FNaY3 tetrahedra that share  a cornercorner with one F(2)Na2Y2 tetrahedra,  a cornercorner with one F(3)Na2Y2 tetrahedra,  a cornercorner with one F(6)Na2Y2 tetrahedra,  a cornercorner with one F(7)NaY3 tetrahedra, corners with two equivalent F(11)Na2Y2 tetrahedra, corners with two equivalent F(5)Na2Y2 tetrahedra, corners with three equivalent F(8)Na2Y2 tetrahedra, corners with four equivalent F(10)NaY3 tetrahedra, corners with two equivalent F(1)Na2Y2 trigonal pyramids,  an edgeedge with one F(2)Na2Y2 tetrahedra,  an edgeedge with one F(3)Na2Y2 tetrahedra,  an edgeedge with one F(4)Na2Y2 tetrahedra,  an edgeedge with one F(6)Na2Y2 tetrahedra,  an edgeedge with one F(9)Na2Y2 tetrahedra, and  an edgeedge with one F(7)NaY3 tetrahedra.
NaYF4 crystallizes in the triclinic P1 space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to one F(1), one F(11), one F(4), one F(5), one F(7), and one F(9) atom. The Na(1)-F(1) bond length is 2.43 Å. The Na(1)-F(11) bond length is 2.22 Å. The Na(1)-F(4) bond length is 2.33 Å. The Na(1)-F(5) bond length is 2.32 Å. The Na(1)-F(7) bond length is 2.29 Å. The Na(1)-F(9) bond length is 2.30 Å. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one F(10), one F(12), one F(2), one F(3), one F(6), and one F(8) atom. The Na(2)-F(10) bond length is 2.23 Å. The Na(2)-F(12) bond length is 2.31 Å. The Na(2)-F(2) bond length is 2.29 Å. The Na(2)-F(3) bond length is 2.34 Å. The Na(2)-F(6) bond length is 2.36 Å. The Na(2)-F(8) bond length is 2.22 Å. In the third Na site, Na(3) is bonded in a 9-coordinate geometry to one F(1), one F(11), one F(2), one F(3), one F(4), one F(5), one F(6), one F(8), and one F(9) atom. The Na(3)-F(1) bond length is 2.55 Å. The Na(3)-F(11) bond length is 2.34 Å. The Na(3)-F(2) bond length is 2.46 Å. The Na(3)-F(3) bond length is 2.52 Å. The Na(3)-F(4) bond length is 2.46 Å. The Na(3)-F(5) bond length is 2.54 Å. The Na(3)-F(6) bond length is 2.50 Å. The Na(3)-F(8) bond length is 2.33 Å. The Na(3)-F(9) bond length is 2.31 Å. There are three inequivalent Y sites. In the first Y site, Y(1) is bonded in a 9-coordinate geometry to one F(1), one F(10), one F(11), one F(12), one F(4), one F(6), one F(7), one F(8), and one F(9) atom. The Y(1)-F(1) bond length is 2.30 Å. The Y(1)-F(10) bond length is 2.33 Å. The Y(1)-F(11) bond length is 2.30 Å. The Y(1)-F(12) bond length is 2.35 Å. The Y(1)-F(4) bond length is 2.31 Å. The Y(1)-F(6) bond length is 2.29 Å. The Y(1)-F(7) bond length is 2.37 Å. The Y(1)-F(8) bond length is 2.29 Å. The Y(1)-F(9) bond length is 2.30 Å. In the second Y site, Y(2) is bonded in a 9-coordinate geometry to one F(10), one F(11), one F(12), one F(2), one F(3), one F(5), one F(7), one F(8), and one F(9) atom. The Y(2)-F(10) bond length is 2.35 Å. The Y(2)-F(11) bond length is 2.31 Å. The Y(2)-F(12) bond length is 2.34 Å. The Y(2)-F(2) bond length is 2.28 Å. The Y(2)-F(3) bond length is 2.29 Å. The Y(2)-F(5) bond length is 2.30 Å. The Y(2)-F(7) bond length is 2.35 Å. The Y(2)-F(8) bond length is 2.29 Å. The Y(2)-F(9) bond length is 2.30 Å. In the third Y site, Y(3) is bonded in a 9-coordinate geometry to one F(1), one F(10), one F(12), one F(2), one F(3), one F(4), one F(5), one F(6), and one F(7) atom. The Y(3)-F(1) bond length is 2.30 Å. The Y(3)-F(10) bond length is 2.36 Å. The Y(3)-F(12) bond length is 2.33 Å. The Y(3)-F(2) bond length is 2.30 Å. The Y(3)-F(3) bond length is 2.30 Å. The Y(3)-F(4) bond length is 2.31 Å. The Y(3)-F(5) bond length is 2.29 Å. The Y(3)-F(6) bond length is 2.30 Å. The Y(3)-F(7) bond length is 2.34 Å. There are twelve inequivalent F sites. In the first F site, F(1) is bonded to one Na(1), one Na(3), one Y(1), and one Y(3) atom to form distorted FNa2Y2 trigonal pyramids that share  a cornercorner with one F(11)Na2Y2 tetrahedra,  a cornercorner with one F(5)Na2Y2 tetrahedra,  a cornercorner with one F(9)Na2Y2 tetrahedra,  a cornercorner with one F(7)NaY3 tetrahedra, corners with two equivalent F(2)Na2Y2 tetrahedra, corners with two equivalent F(8)Na2Y2 tetrahedra, corners with two equivalent F(12)NaY3 tetrahedra, corners with three equivalent F(6)Na2Y2 tetrahedra, corners with four equivalent F(4)Na2Y2 tetrahedra,  an edgeedge with one F(11)Na2Y2 tetrahedra,  an edgeedge with one F(3)Na2Y2 tetrahedra,  an edgeedge with one F(5)Na2Y2 tetrahedra,  an edgeedge with one F(9)Na2Y2 tetrahedra,  an edgeedge with one F(10)NaY3 tetrahedra, and  an edgeedge with one F(7)NaY3 tetrahedra. In the second F site, F(2) is bonded to one Na(2), one Na(3), one Y(2), and one Y(3) atom to form FNa2Y2 tetrahedra that share  a cornercorner with one F(6)Na2Y2 tetrahedra,  a cornercorner with one F(8)Na2Y2 tetrahedra,  a cornercorner with one F(10)NaY3 tetrahedra,  a cornercorner with one F(12)NaY3 tetrahedra, corners with two equivalent F(11)Na2Y2 tetrahedra, corners with two equivalent F(7)NaY3 tetrahedra, corners with three equivalent F(5)Na2Y2 tetrahedra, corners with four equivalent F(3)Na2Y2 tetrahedra, corners with two equivalent F(1)Na2Y2 trigonal pyramids,  an edgeedge with one F(4)Na2Y2 tetrahedra,  an edgeedge with one F(6)Na2Y2 tetrahedra,  an edgeedge with one F(8)Na2Y2 tetrahedra,  an edgeedge with one F(9)Na2Y2 tetrahedra,  an edgeedge with one F(10)NaY3 tetrahedra, and  an edgeedge with one F(12)NaY3 tetrahedra. In the third F site, F(3) is bonded to one Na(2), one Na(3), one Y(2), and one Y(3) atom to form distorted FNa2Y2 tetrahedra that share  a cornercorner with one F(5)Na2Y2 tetrahedra,  a cornercorner with one F(8)Na2Y2 tetrahedra,  a cornercorner with one F(10)NaY3 tetrahedra,  a cornercorner with one F(12)NaY3 tetrahedra, corners with two equivalent F(4)Na2Y2 tetrahedra, corners with two equivalent F(9)Na2Y2 tetrahedra, corners with two equivalent F(7)NaY3 tetrahedra, corners with three equivalent F(6)Na2Y2 tetrahedra, corners with four equivalent F(2)Na2Y2 tetrahedra,  an edgeedge with one F(11)Na2Y2 tetrahedra,  an edgeedge with one F(5)Na2Y2 tetrahedra,  an edgeedge with one F(8)Na2Y2 tetrahedra,  an edgeedge with one F(10)NaY3 tetrahedra,  an edgeedge with one F(12)NaY3 tetrahedra, and  an edgeedge with one F(1)Na2Y2 trigonal pyramid. In the fourth F site, F(4) is bonded to one Na(1), one Na(3), one Y(1), and one Y(3) atom to form FNa2Y2 tetrahedra that share  a cornercorner with one F(11)Na2Y2 tetrahedra,  a cornercorner with one F(6)Na2Y2 tetrahedra,  a cornercorner with one F(9)Na2Y2 tetrahedra,  a cornercorner with one F(7)NaY3 tetrahedra, corners with two equivalent F(3)Na2Y2 tetrahedra, corners with two equivalent F(8)Na2Y2 tetrahedra, corners with two equivalent F(10)NaY3 tetrahedra, corners with three equivalent F(5)Na2Y2 tetrahedra, corners with four equivalent F(1)Na2Y2 trigonal pyramids,  an edgeedge with one F(11)Na2Y2 tetrahedra,  an edgeedge with one F(2)Na2Y2 tetrahedra,  an edgeedge with one F(6)Na2Y2 tetrahedra,  an edgeedge with one F(9)Na2Y2 tetrahedra,  an edgeedge with one F(12)NaY3 tetrahedra, and  an edgeedge with one F(7)NaY3 tetrahedra. In the fifth F site, F(5) is bonded to one Na(1), one Na(3), one Y(2), and one Y(3) atom to form distorted FNa2Y2 tetrahedra that share  a cornercorner with one F(11)Na2Y2 tetrahedra,  a cornercorner with one F(3)Na2Y2 tetrahedra,  a cornercorner with one F(9)Na2Y2 tetrahedra,  a cornercorner with one F(7)NaY3 tetrahedra, corners with two equivalent F(6)Na2Y2 tetrahedra, corners with two equivalent F(10)NaY3 tetrahedra, corners with two equivalent F(12)NaY3 tetrahedra, corners with three equivalent F(2)Na2Y2 tetrahedra, corners with three equivalent F(4)Na2Y2 tetrahedra,  a cornercorner with one F(1)Na2Y2 trigonal pyramid,  an edgeedge with one F(11)Na2Y2 tetrahedra,  an edgeedge with one F(3)Na2Y2 tetrahedra,  an edgeedge with one F(8)Na2Y2 tetrahedra,  an edgeedge with one F(9)Na2Y2 tetrahedra,  an edgeedge with one F(7)NaY3 tetrahedra, and  an edgeedge with one F(1)Na2Y2 trigonal pyramid. In the sixth F site, F(6) is bonded to one Na(2), one Na(3), one Y(1), and one Y(3) atom to form FNa2Y2 tetrahedra that share  a cornercorner with one F(2)Na2Y2 tetrahedra,  a cornercorner with one F(4)Na2Y2 tetrahedra,  a cornercorner with one F(8)Na2Y2 tetrahedra,  a cornercorner with one F(10)NaY3 tetrahedra,  a cornercorner with one F(12)NaY3 tetrahedra, corners with two equivalent F(11)Na2Y2 tetrahedra, corners with two equivalent F(5)Na2Y2 tetrahedra, corners with two equivalent F(9)Na2Y2 tetrahedra, corners with three equivalent F(3)Na2Y2 tetrahedra, corners with three equivalent F(1)Na2Y2 trigonal pyramids,  an edgeedge with one F(2)Na2Y2 tetrahedra,  an edgeedge with one F(4)Na2Y2 tetrahedra,  an edgeedge with one F(8)Na2Y2 tetrahedra,  an edgeedge with one F(10)NaY3 tetrahedra,  an edgeedge with one F(12)NaY3 tetrahedra, and  an edgeedge with one F(7)NaY3 tetrahedra. In the seventh F site, F(7) is bonded to one Na(1), one Y(1), one Y(2), and one Y(3) atom to form FNaY3 tetrahedra that share  a cornercorner with one F(4)Na2Y2 tetrahedra,  a cornercorner with one F(5)Na2Y2 tetrahedra,  a cornercorner with one F(9)Na2Y2 tetrahedra,  a cornercorner with one F(12)NaY3 tetrahedra, corners with two equivalent F(2)Na2Y2 tetrahedra, corners with two equivalent F(3)Na2Y2 tetrahedra, corners with two equivalent F(8)Na2Y2 tetrahedra, corners with three equivalent F(11)Na2Y2 tetrahedra, corners with three equivalent F(10)NaY3 tetrahedra,  a cornercorner with one F(1)Na2Y2 trigonal pyramid,  an edgeedge with one F(4)Na2Y2 tetrahedra,  an edgeedge with one F(5)Na2Y2 tetrahedra,  an edgeedge with one F(6)Na2Y2 tetrahedra,  an edgeedge with one F(9)Na2Y2 tetrahedra,  an edgeedge with one F(12)NaY3 tetrahedra, and  an edgeedge with one F(1)Na2Y2 trigonal pyramid. In the eighth F site, F(8) is bonded to one Na(2), one Na(3), one Y(1), and one Y(2) atom to form FNa2Y2 tetrahedra that share  a cornercorner with one F(11)Na2Y2 tetrahedra,  a cornercorner with one F(2)Na2Y2 tetrahedra,  a cornercorner with one F(3)Na2Y2 tetrahedra,  a cornercorner with one F(6)Na2Y2 tetrahedra,  a cornercorner with one F(10)NaY3 tetrahedra, corners with two equivalent F(4)Na2Y2 tetrahedra, corners with two equivalent F(7)NaY3 tetrahedra, corners with three equivalent F(9)Na2Y2 tetrahedra, corners with three equivalent F(12)NaY3 tetrahedra, corners with two equivalent F(1)Na2Y2 trigonal pyramids,  an edgeedge with one F(11)Na2Y2 tetrahedra,  an edgeedge with one F(2)Na2Y2 tetrahedra,  an edgeedge with one F(3)Na2Y2 tetrahedra,  an edgeedge with one F(5)Na2Y2 tetrahedra,  an edgeedge with one F(6)Na2Y2 tetrahedra, and  an edgeedge with one F(10)NaY3 tetrahedra. In the ninth F site, F(9) is bonded to one Na(1), one Na(3), one Y(1), and one Y(2) atom to form FNa2Y2 tetrahedra that share  a cornercorner with one F(4)Na2Y2 tetrahedra,  a cornercorner with one F(5)Na2Y2 tetrahedra,  a cornercorner with one F(7)NaY3 tetrahedra, corners with two equivalent F(3)Na2Y2 tetrahedra, corners with two equivalent F(6)Na2Y2 tetrahedra, corners with two equivalent F(10)NaY3 tetrahedra, corners with three equivalent F(8)Na2Y2 tetrahedra, corners with four equivalent F(11)Na2Y2 tetrahedra,  a cornercorner with one F(1)Na2Y2 trigonal pyramid,  an edgeedge with one F(2)Na2Y2 tetrahedra,  an edgeedge with one F(4)Na2Y2 tetrahedra,  an edgeedge with one F(5)Na2Y2 tetrahedra,  an edgeedge with one F(12)NaY3 tetrahedra,  an edgeedge with one F(7)NaY3 tetrahedra, and  an edgeedge with one F(1)Na2Y2 trigonal pyramid. In the tenth F site, F(10) is bonded to one Na(2), one Y(1), one Y(2), and one Y(3) atom to form FNaY3 tetrahedra that share  a cornercorner with one F(2)Na2Y2 tetrahedra,  a cornercorner with one F(3)Na2Y2 tetrahedra,  a cornercorner with one F(6)Na2Y2 tetrahedra,  a cornercorner with one F(8)Na2Y2 tetrahedra, corners with two equivalent F(4)Na2Y2 tetrahedra, corners with two equivalent F(5)Na2Y2 tetrahedra, corners with two equivalent F(9)Na2Y2 tetrahedra, corners with three equivalent F(7)NaY3 tetrahedra, corners with four equivalent F(12)NaY3 tetrahedra,  an edgeedge with one F(11)Na2Y2 tetrahedra,  an edgeedge with one F(2)Na2Y2 tetrahedra,  an edgeedge with one F(3)Na2Y2 tetrahedra,  an edgeedge with one F(6)Na2Y2 tetrahedra,  an edgeedge with one F(8)Na2Y2 tetrahedra, and  an edgeedge with one F(1)Na2Y2 trigonal pyramid. In the eleventh F site, F(11) is bonded to one Na(1), one Na(3), one Y(1), and one Y(2) atom to form FNa2Y2 tetrahedra that share  a cornercorner with one F(4)Na2Y2 tetrahedra,  a cornercorner with one F(5)Na2Y2 tetrahedra,  a cornercorner with one F(8)Na2Y2 tetrahedra, corners with two equivalent F(2)Na2Y2 tetrahedra, corners with two equivalent F(6)Na2Y2 tetrahedra, corners with two equivalent F(12)NaY3 tetrahedra, corners with three equivalent F(7)NaY3 tetrahedra, corners with four equivalent F(9)Na2Y2 tetrahedra,  a cornercorner with one F(1)Na2Y2 trigonal pyramid,  an edgeedge with one F(3)Na2Y2 tetrahedra,  an edgeedge with one F(4)Na2Y2 tetrahedra,  an edgeedge with one F(5)Na2Y2 tetrahedra,  an edgeedge with one F(8)Na2Y2 tetrahedra,  an edgeedge with one F(10)NaY3 tetrahedra, and  an edgeedge with one F(1)Na2Y2 trigonal pyramid. In the twelfth F site, F(12) is bonded to one Na(2), one Y(1), one Y(2), and one Y(3) atom to form FNaY3 tetrahedra that share  a cornercorner with one F(2)Na2Y2 tetrahedra,  a cornercorner with one F(3)Na2Y2 tetrahedra,  a cornercorner with one F(6)Na2Y2 tetrahedra,  a cornercorner with one F(7)NaY3 tetrahedra, corners with two equivalent F(11)Na2Y2 tetrahedra, corners with two equivalent F(5)Na2Y2 tetrahedra, corners with three equivalent F(8)Na2Y2 tetrahedra, corners with four equivalent F(10)NaY3 tetrahedra, corners with two equivalent F(1)Na2Y2 trigonal pyramids,  an edgeedge with one F(2)Na2Y2 tetrahedra,  an edgeedge with one F(3)Na2Y2 tetrahedra,  an edgeedge with one F(4)Na2Y2 tetrahedra,  an edgeedge with one F(6)Na2Y2 tetrahedra,  an edgeedge with one F(9)Na2Y2 tetrahedra, and  an edgeedge with one F(7)NaY3 tetrahedra.