Download boron arsenide

BORON ARSENIDE
B12As2
The compound B12As2 is of importance as a semiconductor material, but is difficult to
obtain in high quality. The structure is similar to that of boron carbide, B 4C, with icosahedra
of B12 linked through external B-B bonds and the resultant holes filled with As2 molecules.
The space group is R3, with the rhombohedral cell dimensions a = 5.337Å and = 70.216º,
(personal communication), and there are two independent B atoms and one independent As
atom in the asymmetric unit. The intraicosahedral B-B distances are 1.74, 1.80, 1.84 and
1.89Å, and the intericosahedral B-B distance is 1.77Å . The As-As bond is 2.40Å and the
length of the B-As bond is 1.99Å.
The model shows a full rhombohedral cell, with eight
associated As2 molecules. It contains 110 balls and 295 rods.
B icosahedra and the
BORON ARSENIDE
B12As2
Overstrike 3 in space group
BORON ARSENIDE
B12As2
The compound B12As2 is of importance as a semiconductor material, but is difficult to
obtain in high quality. The structure is similar to that of boron carbide, B 4C, with icosahedra
of B12 linked through external B-B bonds and the resultant holes filled with As2 molecules.
The space group is R3, with the rhombohedral cell dimensions a = 5.337Å and = 70.216º,
(personal communication), and there are two independent B atoms and one independent As
atom in the asymmetric unit. The intraicosahedral B-B distances are 1.74, 1.80, 1.84 and
1.89Å, and the intericosahedral B-B distance is 1.77Å . The As-As bond is 2.40Å and the
length of the B-As bond is 1.99Å.
The model shows a full rhombohedral cell, with eight
associated As2 molecules. It contains 110 balls and 295 rods.
BORON ARSENIDE
B12As2
Overstrike 3 in space group
B icosahedra and the