ErYAl6(BO3)8 is Calcite-derived structured and crystallizes in the monoclinic P2 space group. Er(1) is bonded in a 6-coordinate geometry to two equivalent O(6), two equivalent O(7), and two equivalent O(9) atoms. Y(1) is bonded in a 6-coordinate geometry to two equivalent O(10), two equivalent O(5), and two equivalent O(8) atoms. There are four inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(1), one O(11), one O(14), one O(4), one O(8), and one O(9) atom to form edge-sharing AlO6 octahedra. In the second Al site, Al(2) is bonded to one O(10), one O(12), one O(13), one O(2), one O(3), and one O(7) atom to form edge-sharing AlO6 octahedra. In the third Al site, Al(3) is bonded to two equivalent O(1), two equivalent O(11), and two equivalent O(5) atoms to form edge-sharing AlO6 octahedra. In the fourth Al site, Al(4) is bonded to two equivalent O(12), two equivalent O(2), and two equivalent O(6) atoms to form edge-sharing AlO6 octahedra. There are six inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(12), one O(5), and one O(7) atom. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(11), one O(6), and one O(8) atom. In the third B site, B(3) is bonded in a trigonal planar geometry to one O(13) and two equivalent O(9) atoms. In the fourth B site, B(4) is bonded in a trigonal planar geometry to one O(14) and two equivalent O(10) atoms. In the fifth B site, B(5) is bonded in a trigonal planar geometry to one O(3) and two equivalent O(1) atoms. In the sixth B site, B(6) is bonded in a trigonal planar geometry to one O(4) and two equivalent O(2) atoms. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Al(1), one Al(3), and one B(5) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Al(2), one Al(4), and one B(6) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Al(2) and one B(5) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Al(1) and one B(6) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Y(1), one Al(3), and one B(1) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Er(1), one Al(4), and one B(2) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Er(1), one Al(2), and one B(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Y(1), one Al(1), and one B(2) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Er(1), one Al(1), and one B(3) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Y(1), one Al(2), and one B(4) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to one Al(1), one Al(3), and one B(2) atom. In the twelfth O site, O(12) is bonded in a distorted trigonal planar geometry to one Al(2), one Al(4), and one B(1) atom. In the thirteenth O site, O(13) is bonded in a distorted trigonal planar geometry to two equivalent Al(2) and one B(3) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal planar geometry to two equivalent Al(1) and one B(4) atom.
ErYAl6(BO3)8 is Calcite-derived structured and crystallizes in the monoclinic P2 space group. Er(1) is bonded in a 6-coordinate geometry to two equivalent O(6), two equivalent O(7), and two equivalent O(9) atoms. Both Er(1)-O(6) bond lengths are 2.32 Å. Both Er(1)-O(7) bond lengths are 2.32 Å. Both Er(1)-O(9) bond lengths are 2.32 Å. Y(1) is bonded in a 6-coordinate geometry to two equivalent O(10), two equivalent O(5), and two equivalent O(8) atoms. Both Y(1)-O(10) bond lengths are 2.34 Å. Both Y(1)-O(5) bond lengths are 2.34 Å. Both Y(1)-O(8) bond lengths are 2.34 Å. There are four inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(1), one O(11), one O(14), one O(4), one O(8), and one O(9) atom to form edge-sharing AlO6 octahedra. The Al(1)-O(1) bond length is 1.93 Å. The Al(1)-O(11) bond length is 1.94 Å. The Al(1)-O(14) bond length is 1.94 Å. The Al(1)-O(4) bond length is 1.93 Å. The Al(1)-O(8) bond length is 1.88 Å. The Al(1)-O(9) bond length is 1.88 Å. In the second Al site, Al(2) is bonded to one O(10), one O(12), one O(13), one O(2), one O(3), and one O(7) atom to form edge-sharing AlO6 octahedra. The Al(2)-O(10) bond length is 1.88 Å. The Al(2)-O(12) bond length is 1.94 Å. The Al(2)-O(13) bond length is 1.94 Å. The Al(2)-O(2) bond length is 1.93 Å. The Al(2)-O(3) bond length is 1.93 Å. The Al(2)-O(7) bond length is 1.88 Å. In the third Al site, Al(3) is bonded to two equivalent O(1), two equivalent O(11), and two equivalent O(5) atoms to form edge-sharing AlO6 octahedra. Both Al(3)-O(1) bond lengths are 1.93 Å. Both Al(3)-O(11) bond lengths are 1.94 Å. Both Al(3)-O(5) bond lengths are 1.88 Å. In the fourth Al site, Al(4) is bonded to two equivalent O(12), two equivalent O(2), and two equivalent O(6) atoms to form edge-sharing AlO6 octahedra. Both Al(4)-O(12) bond lengths are 1.94 Å. Both Al(4)-O(2) bond lengths are 1.93 Å. Both Al(4)-O(6) bond lengths are 1.88 Å. There are six inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(12), one O(5), and one O(7) atom. The B(1)-O(12) bond length is 1.39 Å. The B(1)-O(5) bond length is 1.38 Å. The B(1)-O(7) bond length is 1.38 Å. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(11), one O(6), and one O(8) atom. The B(2)-O(11) bond length is 1.39 Å. The B(2)-O(6) bond length is 1.38 Å. The B(2)-O(8) bond length is 1.38 Å. In the third B site, B(3) is bonded in a trigonal planar geometry to one O(13) and two equivalent O(9) atoms. The B(3)-O(13) bond length is 1.39 Å. Both B(3)-O(9) bond lengths are 1.38 Å. In the fourth B site, B(4) is bonded in a trigonal planar geometry to one O(14) and two equivalent O(10) atoms. The B(4)-O(14) bond length is 1.39 Å. Both B(4)-O(10) bond lengths are 1.38 Å. In the fifth B site, B(5) is bonded in a trigonal planar geometry to one O(3) and two equivalent O(1) atoms. The B(5)-O(3) bond length is 1.39 Å. Both B(5)-O(1) bond lengths are 1.39 Å. In the sixth B site, B(6) is bonded in a trigonal planar geometry to one O(4) and two equivalent O(2) atoms. The B(6)-O(4) bond length is 1.39 Å. Both B(6)-O(2) bond lengths are 1.39 Å. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Al(1), one Al(3), and one B(5) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Al(2), one Al(4), and one B(6) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Al(2) and one B(5) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Al(1) and one B(6) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Y(1), one Al(3), and one B(1) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Er(1), one Al(4), and one B(2) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Er(1), one Al(2), and one B(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Y(1), one Al(1), and one B(2) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Er(1), one Al(1), and one B(3) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Y(1), one Al(2), and one B(4) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to one Al(1), one Al(3), and one B(2) atom. In the twelfth O site, O(12) is bonded in a distorted trigonal planar geometry to one Al(2), one Al(4), and one B(1) atom. In the thirteenth O site, O(13) is bonded in a distorted trigonal planar geometry to two equivalent Al(2) and one B(3) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal planar geometry to two equivalent Al(1) and one B(4) atom.