Ga2BiAs is Enargite-like structured and crystallizes in the trigonal R3m space group. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to three equivalent Bi(1) and one As(1) atom to form GaBi3As tetrahedra that share corners with six equivalent Ga(1)Bi3As tetrahedra and corners with six equivalent Ga(2)BiAs3 tetrahedra. In the second Ga site, Ga(2) is bonded to one Bi(1) and three equivalent As(1) atoms to form GaBiAs3 tetrahedra that share corners with six equivalent Ga(1)Bi3As tetrahedra and corners with six equivalent Ga(2)BiAs3 tetrahedra. Bi(1) is bonded to one Ga(2) and three equivalent Ga(1) atoms to form BiGa4 tetrahedra that share corners with six equivalent Bi(1)Ga4 tetrahedra and corners with six equivalent As(1)Ga4 tetrahedra. As(1) is bonded to one Ga(1) and three equivalent Ga(2) atoms to form AsGa4 tetrahedra that share corners with six equivalent Bi(1)Ga4 tetrahedra and corners with six equivalent As(1)Ga4 tetrahedra.
Ga2BiAs is Enargite-like structured and crystallizes in the trigonal R3m space group. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to three equivalent Bi(1) and one As(1) atom to form GaBi3As tetrahedra that share corners with six equivalent Ga(1)Bi3As tetrahedra and corners with six equivalent Ga(2)BiAs3 tetrahedra. All Ga(1)-Bi(1) bond lengths are 2.72 Å. The Ga(1)-As(1) bond length is 2.49 Å. In the second Ga site, Ga(2) is bonded to one Bi(1) and three equivalent As(1) atoms to form GaBiAs3 tetrahedra that share corners with six equivalent Ga(1)Bi3As tetrahedra and corners with six equivalent Ga(2)BiAs3 tetrahedra. The Ga(2)-Bi(1) bond length is 2.81 Å. All Ga(2)-As(1) bond lengths are 2.60 Å. Bi(1) is bonded to one Ga(2) and three equivalent Ga(1) atoms to form BiGa4 tetrahedra that share corners with six equivalent Bi(1)Ga4 tetrahedra and corners with six equivalent As(1)Ga4 tetrahedra. As(1) is bonded to one Ga(1) and three equivalent Ga(2) atoms to form AsGa4 tetrahedra that share corners with six equivalent Bi(1)Ga4 tetrahedra and corners with six equivalent As(1)Ga4 tetrahedra.