Aerinite

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
Aerinite
Aerinite2.jpg
Aerinite from Spain
General
Category Inosilicate
Formula
(repeating unit)
Ca4(Al,Fe,Mg)10Si12O35(OH)12CO3·12H2O
Strunz classification 9.DB.45
Crystal system Monoclinic
Unknown space group
Unit cell a = 14.690(15), b = 16.872(15)
c = 5.170(15) [Å]; β = 94.75°; Z = 1[1]
Identification
Color Blue to blue-green
Crystal habit fibrous
Mohs scale hardness 3
Luster vitreous
Streak bluish white
Diaphaneity translucent
Specific gravity 2.48
Optical properties Biaxial (-)
Refractive index nα1.510(5), nβ = 1.560(5), nγ = 1.580
Pleochroism Intense; X = bright blue; Y = Z = pale beige
2V angle 63° (calc.)
Dispersion δ = 0.07
References [2][3][1]
Aerinite from Spain

Aerinite (Ca4(Al,Fe,Mg)10Si12O35(OH)12CO3·12H2O) is a bluish-purple inosilicate mineral. It crystallizes in the monoclinic system and occurs as fibrous masses and coatings. It has a dark, vitreous luster, a specific gravity of 2.48 and a Mohs hardness of 3.

It is a low-temperature hydrothermal phase occurring in zeolite facies alteration of mafic rocks. Associated minerals include prehnite, scolecite and mesolite.[2]

Its name comes from a Greek root "aerinos," meaning "atmosphere" or "sky".[1]

References[edit]

  1. ^ a b c Aerinite. Mindat.org
  2. ^ a b Aerinite. Handbook of Mineralogy
  3. ^ Aerinite. Webmineral