Germanide halide

Germanide halides are compound that include the germanide (Ge4−) anion and a halide such as chloride (Cl−), bromide (Br−) or iodide (I−). They include germanide iodides, germanide bromides or germanide chlorides. They can be considered as mixed anion compounds. They are in the category of tetrelidehalides. Related compounds include the silicide iodides, and carbide iodides.

List

Chlorides
formula system space group unit cell Å volume density comment ref
La3Cl2Ge3 monoclinic C2/m a=18.047 b=4.927 c=10.739 β=98.25 Z=4 824.2 5.685 air and water sensitive [1]

Bromides
formula system space group unit cell Å volume density comment ref
Br2Ge3La3 monoclinic C2/m a =18.622 b =4.3263 c =10.897 β =98° Z=4 869.4 6.069 air and water sensitive [2]
Gd2GeBr2 trigonal R3m a = 4.1442, c = 29.487 [3]
Gd2GeBr2 trigonal P3m1 a = 4.1668, c = 9.8173 semiconductor [3]

Iodides
formula system space group unit cell Å volume density comment ref
Y2GeI2 trigonal R3m a = 4.2135 c = 31.480 Z=3 484 5.19 bronze [3]
GeI2La2 trigonal P3m1 a=4.45 c=10.868 Z=1 186.46 3.381 air and water sensitive [2]
GeI2La2 trigonal R3m a=4.465 c=32.591 Z=3 562.7 5.349 air and water sensitive [2]
Ge2I2La2 trigonal P3m1 a=4.272 c=11.8349 Z=1 187.11 6.006 air and water sensitive [2]
GeI3La3 cubic I4132 a=12.6036 Z=8 2002.1 5.773 air and water sensitive [2]
Ge3I5La6 monooclinic C2/m a=19.338 b=4.423 c=14.895, β=128.16° Z=2 1001.7 5.589 air and water sensitive [2]
GeI12La7 trigonal R3 a=16.122 c =10.768 Z=3 2423.8 5.487 air and water sensitive [2]
Gd2GeI2 trigonal R3m a = 4.2527 c = 31.657 Z=3 495.84 6.44 bronze [3]

References
  1. Mattausch, Hansjürgen; Zheng, Chong; Ryazanov, Mikhail; Simon, Arndt (February 2005). "Reduced Lanthanum Halides with Ge as Interstitials: La2I2Ge, La2I2Ge2, La3Cl2Ge3, La3Br2Ge3, La3I3Ge, La6I5Ge3 and La7+xI12Ge". Zeitschrift für anorganische und allgemeine Chemie (in German). 631 (2–3): 302–308. doi:10.1002/zaac.200400269. ISSN 0044-2313.
  2. Mattausch, Hansjürgen; Zheng, Chong; Ryazanov, Mikhail; Simon, Arndt (February 2005). "Reduced Lanthanum Halides with Ge as Interstitials: La2I2Ge, La2I2Ge2, La3Cl2Ge3, La3Br2Ge3, La3I3Ge, La6I5Ge3 and La7+xI12Ge". Zeitschrift für anorganische und allgemeine Chemie (in German). 631 (2–3): 302–308. doi:10.1002/zaac.200400269. ISSN 0044-2313.
  3. Lukachuk, Mar'yana; Kremer, Reinhard K.; Mattausch, Hansjürgen; Simon, Arndt (2007-04-01). "New Layered Germanide Halides RE 2 GeX 2 (RE = Y, Gd; X = Br, I)". Inorganic Chemistry. 46 (8): 3231–3235. doi:10.1021/ic062425d. ISSN 0020-1669. PMID 17373789.
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