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Strontium Dichromate, SrCr2O7.3H2O

Strontium Dichromate, SrCr2O7.3H2O, is formed by dissolving the normal chromate in chromic acid solution and allowing to crystallise, or by treating freshly precipitated strontium chromate with solid chromic anhydride. It yields large reddish-brown monoclinic crystals,

a:b:c = 0.6023:1:0.5460; γ = 87° 28',

readily soluble in water. On heating, the water of crystallisation is completely expelled at 110° C.

The additive compound SrCr2O7.SrCl2.4HgCl2.H2O has been obtained.

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