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Crystal Structures of Hydrates of Simple Inorganic Salts. II. Water-rich Calcium Bromide and Iodide Hydrates: CaBr2 · 9H2O, CaI2 · 8H2O, CaI2 · 7H2O and CaI2 · 6.5H2O

Crystal Structures of Hydrates of Simple Inorganic Salts. II. Water-rich Calcium Bromide and Iodide Hydrates: CaBr2 · 9H2O, CaI2 · 8H2O, CaI2 · 7H2O and CaI2 · 6.5H2O

Erik Hennings, Horst Schmidt, Wolfgang Voigt

Acta Crystallogr C Struct Chem. 2014 Sep;70(Pt 9):876-81.

PMID: 25186361

Abstract:

Single crystals of calcium bromide enneahydrate, CaBr(2) · 9H2O, calcium iodide octahydrate, CaI(2) · 8H2O, calcium iodide heptahydrate, CaI(2) · 7H2O, and calcium iodide 6.5-hydrate, CaI(2) · 6.5H2O, were grown from their aqueous solutions at and below room temperature according to the solid-liquid phase diagram. The crystal structure of CaI(2) · 6.5H2O was redetermined. All four structures are built up from distorted Ca(H2O)8 antiprisms. The antiprisms of the iodide hydrate structures are connected either via trigonal-plane-sharing or edge-sharing, forming dimeric units. The antiprisms in calcium bromide enneahydrate are monomeric.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP10102688	Calcium iodide		10102-68-8	Price
AP71626987	Calcium iodide hydrate		71626-98-7	Price

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