ChemInform Abstract: An Oxide Chloride of Calcium, Ca4OCl6,
Abstract
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ChemInform Abstract
is obtained as single crystals by reacting CaCl2 with Ca and graphite in the presence of small amounts of “oxygen”. Powdered preparations can be obtained by heating CaCl2 and CaO at 900 °C. This first oxide chloride of Ca crystallizes in the hexagonal system (P63mc, Z = 2) and is isotypic to compounds as Ba4OCl6, Yb4OCl6, or K6HgS4. Its structure contains approximately regular tetrahedral (Ca4O)6+ units surrounded by 18 Cl-. Ca4OCl6 is not formed during the dehydration of CaCl2×6 H2O.
