Crystal structure of Ba8Ga4.44Ge39.14□2.42, Ba8Ga8.62Ge36□1.38, and Ba8Ga12.35Ge33.27□0.38, three clathrate-I variants
Year: 2002
Type: article
Abstract: BaeGa4.44Ge39.14 (1).cubic, Prrßn (No. 223), a = 10.6861(2)Â, V= 1220.3Â 3 , Z= 1, RgJF) = 0.019, wR oe ((F*) = 0.037, T= 293 Κ.BagGa8.62Ge36(2), cubic, Pm3n (No. 223), a = 10.7274(2)Â, V= 1234.5 Â 3 , Z= 1, Rg(F) = 0.022, wR^F 2 ) = 0.047, Γ= 293 Κ.Ba8Ga12.35Ge33.27(3), cubic, Pm3n (No. 223), a = 10.7659(2)À, V= 1247.8Â 3 , Z= 1, RfffF) = 0.022, wR^F 2 ) = 0.046, T= 293 Κ Source of materialThe samples with nominal composition BagGa4Ge39 (S-l), BagGagGe36 (S-2) and BaeGai2Ge33 (S-3) were prepared by highfrequency induction melting of the elements (argon atmosphere, open glassy carbon crucible), and annealed at 1023 Κ for 9 days.The materials are grey metallic, brittle and stable in air.As shown by XRD and metallographic studies, the samples S-l, S-2 and S-3 contain minor amounts of Ba^Ge^ (-3% -9%).Chemical composition of the majority phase determined by WDX analysis (CAMECA electron microprobe) was found to be Bae.02(i)Ga4.44(i)Ge39.i2C)(S-l, 1), Ba7.95(3)Ga8.62(3)Ge36.Q5(4) (S-2,2) and Bas.oo(2)Gai2.35(5)Ge33.27(8)(S-3,3), respectively.
Language: German
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $848
OpenAlex ID: W807460514