Arsenidogermanate

Arsenidogermanates are chemical compounds that contain anions with arsenic bonded to germanium. They are in the category of tetrelarsenides, pnictidogermanates, or tetrelpnictides.

Germanium forms two arsenides: GeAs and GeAs2.[1]

List

name formula formula

weight

crystal

system

space

group

unit cell volume density comments ref
LiGe3As3 orthorhombic Pbam a=10.0862 b=15.7612 c=3.7403 Z=4 594.60 5.01 [2]
Li5GeAs3 black [3]
NaGe6As6 908.05 monoclinic C2/m a = 22.063, b = 3.8032, c = 7.2020, β = 92.744°, Z = 2 603.64 5.00 needles [4]
Na10Ge2As6 monoclinic P121/n1 a=13.531 b=7.544 c=8.298 β = 90.2° Z=2 847.0 [5]
K2GeAs2 orthorhombic Ibam a = 13.292, b = 7.028, c = 6.548 Z = 4 moisture sensitive needles [6]
KGe3As3 481.53 orthorhombic Pnma a=9.993, b=3.7664, c=18.607 Z=4 700.34 4.568 [7]
K2Ge3As3 520.73 orthorhombic Pnnm a=14.1466 b=16.300 c=3.7489 Z=4 864.47 4.001 fibrous metallic [8]
K2NaGaAs2 Ibam a=6.733 b=14.809 c=6.574 Z=4 655.5 3.250 [9]
KCdGeAs2 triclinic P1 a = 8.004, b = 8.402, c = 8.703, α = 71.019°, β = 75.257°, γ = 73.746°, Z=4 band gap 0.8 eV; Ge2As6 units [10]
RbCdGeAs2 triclinic P1 a = 8.269, b = 8.452, c = 8.735, α = 71.163°, β = 75.601°, γ = 73.673°, Z=4 Ge2As6 units [10]
Sr3Ge2As4 red metallic; 1D As3GeGeAs3 units [11]
K5In5Ge5As14 monoclinic C2/m a=40.00,b=3.925,c=10.299, β=99.97°, Z=8 1592 4.55 air sensitive; layered [12]
K8In8Ge5As17 monoclinic P21/c a=18.394,b=19.087,c=25.360, β=105.71°, Z=4 8571 4.45 air sensitive; layered [12]
RbGe3As3 528 orthorhombic Pnma a=10.166 b=3.7595 c=19.028 Z=4 727.2 4.823 [7]
Rb(Ge1.5In0.5)As2(As1.5Ge0.5) orthorhombic Cmc21 a = 3.799, b = 16.50, c = 12.24, Z = 4 767 4.589 [13]
RbXGe2−XInXAs4 [13]
I8As21Ge25 4403 cubic Pm3n a=10.5963 Z=1 1189.8 6.1431 colourless [14]
Cs5GeAs3 metallic; unstable in air; GeAs3 units [15]
BaGe2As2 tetragonal P42mc a=7,786 c=8.664 Z=4 525.2 5.47 metallic [16]
Ba4GeAs4 dark metallic; GeAs4 units [17]
Re3Ge0.6As6.4 [18]
Re3GeAs6 1080.75 cubic Im3m a = 8.73202 Z=4 665.75 10.78 n-type semiconductor [18]
AuGeAs monoclinic Cc a 7.2729, b 6.2953, c 6.3067, β 119.209° [19]
KXGe2−XTlXAs4 [13]

References

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    1    [MX4/2]3− (M=Ga, In; X=P, As)"    . Zeitschrift für anorganische und allgemeine Chemie (in German). 613 (7): 19–25. doi:10.1002/zaac.19926130103. ISSN 0044-2313.
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  13. ^ a b c Shreeve-Keyer, Julie L.; Haushalter, Robert C. (1996), Kajimura, Koji; Kuroda, Shin-ichi (eds.), "Synthesis and Structural Characterization of a Quaternary Zintl Phase Material from the Rb:Ge:In:As System: Rb(Ge1.5ln0.5)As2(As1.5Ge0.5)", Materials and Measurements in Molecular Electronics, Springer Proceedings in Physics, vol. 81, Tokyo: Springer Japan, pp. 139–150, doi:10.1007/978-4-431-68470-1_11, ISBN 978-4-431-68472-5, retrieved 2021-12-08
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