glaucophane


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glaucophane

(glô`kəfān'): see amphiboleamphibole
, any of a group of widely distributed rock-forming minerals, magnesium-iron silicates, often with traces of calcium, aluminum, sodium, titanium, and other elements.
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glaucophane

[′glȯ·kə‚fān]
(mineralogy)
Na2Mg3 Al2Si8 A blue to black monoclinic sodium amphibole; blue to black coloration with marked pleochroism.
References in periodicals archive ?
Being an etymologist she searches for herself in dictionaries and relishes the "lovely words: pyrolusite, ignimbrite, omphacite, uvarovite, glaucophane, schist, shale, gneiss, tuff.
Diamondiferous zones are characterised by dynamic and thermal metamorphism and the presence of grossular garnets, glaucophane and other minerals of high-pressure zones.
Jitang metamorphic complexes: 40Ar/39Ar age of Phengite in Mica-quartzose Schist 230+-1 Ma (Wang GH, 2008); Gemuri metamorphic complexes: Ar-Ar age of Glaucophane 222Ma, Crossite 223-220Ma or 221Ma, and Phengite 215Ma (Table 1); Jitang metamorphic complexes in this study: 40Ar/39Ar ages of Phengite in Mica-quartzose Schist 219.
Louderback studied the glaucophane and associated schists of the Coast Ranges and cooperated in a study of the effects of the great San Francisco earthquake of 1906.
But in fact neither glaucophane nor jadeite nor omphacite have ever been observed in the blocks of Puerto Nuevo Canyon.
it) put out about 15 specimens of glaucophane in slabs to 30 cm across, which he personally collected some years ago at Pollone, Piemonte, Italy.