ATHENA MINERAL: Mineral Data; Pierre Perroud

ATHENA

MINERALOGY

Mineral:	GLAUCOPHANE
Name:	Γλαυκοφανής
Formula:	▢Na₂(Mg₃Al₂)Si₈O₂₂(OH)₂
Crystal System:	Monoclinic
Group:	Amphibole supergroup, with (OH,F,Cl) dominant. Amphibole Na subgroup. Glaucophane group
IMA Number:	2012 s.p.
References:	EJM 4 (1992), 171; HB2/1 (1995); EJM 33 (2021), 77
Type Locality:	Syra Island, Cyclades Islands, Greece
Comments:	▢ = vacancy

Glaucophane, 6x8cm
Sonoma Co., California, USA
Amphibole bought from Ward's, 1980
Photo and Coll. P. Perroud (now in NHM Geneva).
See also: athena.unige.ch -> mineral pictures

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