1910–1911
Britannica 11th
Encyclopaedia Britannica · 11th edition
ERYTHRITE, the name given to (i) a mineral composed of a hydrated cobalt arsenate, and (2) in chemistry, a tetrahydric alcohol, (i) The mineral erythrite has the formula Co3(AsO4)2-8H2O, and crystallizes in the monoclinic system and is isomorphous with vivianite. It sometimes occurs as beautiful radially-arranged groups of blade-shaped crystals with a bright crimson colour and brilliant lustre. On exposure to light the colour and lustre deteriorate. There is a perfect cleavage parallel to the plane of symmetry, on …
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- Vol. 9, pp. 758-758