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Mineralpedia Details for Aerinite

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Aerinite

Aerinite

Named after the Greek word aerinos, meaning “airy,” in reference to the mineral’s typical sky blue color. Aerinite is a rare mineral that occurs at its French locality at Saint Pendelon as “a hydrothermal mineral of the zeolite facies, formed at relatively low temperatures in fractures cutting mafic igneous rocks” in association with prehenite, scoleite, and mesolite. Additional localities for aerinite include in Spain and the United States.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/aerinite.pdf

Formula
(Ca5.1Na0.5)(Fe3+,Al,Fe2+,Mg)4(Al,Mg)6[HSi12O36(OH)12][(CO3)1.2(H2O)12
Crystal System
Trigonal 
Crystal Habit
Fibrous 
Luster
Vitreous (Glassy) 
Color
blue, blue green, sky blue 
Streak
bluish white 
Class
Trigonal - Ditrigonal Pyramidal 
Hardness
WebMineral
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Mindat
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Aerinite from Estopiñán del Castillo, Aragón, Spain

Aerinite
            from Estopiñán del Castillo, Aragón, Spain

Compact fibrous rich blue mineral composing most of matrix.

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Aerinite from Aran Valley, Lerida, Catalonia, Spain

Aerinite
            from Aran Valley, Lerida, Catalonia, Spain

Dull blue mass.

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