hydrogrossularite

noun

hy·​dro·​grossularite

: a mineral Ca₃Al₂(SiO₄)_3−x(OH)_4x, consisting of silicate of calcium and aluminum in which silicon is partly replaced by hydrogen with x near ¹/₂ : one of the hydrogarnets intermediate between grossularite (x =0) and hibschite (x =1)

Word History

Etymology

hydr- + grossularite

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