glaucophane

[glaw-kuh-feyn]

Origin of glaucophane

First recorded in 1840–50; glauco- + -phane
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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glaucophane in Science

glaucophane

[gloukə-fān′]
  1. A blue to grayish-blue or bluish-black monoclinic mineral of the amphibole group. Glaucophane occurs as fibrous prisms in schists (especially blueschists) formed by the regional metamorphism of sodium-rich rocks. Chemical formula: Na2(Mg,Fe)3Al2Si8O22(OH)2.
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