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2004
Structure
D 2000
48- 012
Alkali Scandium Arsenates. Part 2. The Framework Structures of α- and
β-CsSc(HAsO4)2. — The hydrothermal reaction of Sc2O3, H3AsO4, and Cs2CO3
(493 K, autoclave, 7 d) affords α- and β-CsSc(HAsO4)2 in 2% and 98% yield, respectively. α-CsSc(HAsO4)2 crystallizes in the triclinic space group P1 (Z = 3) and is isotypic with (NH4)FeIII(HPO4)2 and β-CsSc(HAsO4)2 crystallizes in the monoclinic space
group P21/c with Z = 4 and is isotypic with (H 3O)FeIII(HPO4)2, as determined by single
crystal XRD. The compounds represent the first arsenate examples of their structure
types. — (SCHWENDTNER, K.; KOLITSCH*, U.; Acta Crystallogr., Sect. C: Cryst.
Struct. Commun. 60 (2004) 9, i84-i88; Inst. Mineral. Kristallogr., Univ. Wien,
A-1090 Wien, Austria; Eng.) — Schramke
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