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  3. Richterite

Collectible minerals - full range in stock "Richterite"

Richterite is a mineral of the group of alkaline amphiboles, forming fibrous crystals and asbestos-like accumulations. Occurs in alkaline igneous rocks, as well as in high-temperature metamorphosed limestones, and among hydrothermal products of basic igneous rocks, and in marbles.

You can see richterite stone for sale and buy it in the Minerals of Russia online store.

Physical properties of Richterite

General
Category Inosilicates
Formula
(repeating unit)		 Na(NaCa)Mg5Si8O22(OH)2#
IMA symbol Rct
Strunz classification 9.DE.20
Crystal system Monoclinic
Crystal class Prismatic (2/m)
(same H-M symbol)
Space group C2/m
Identification
Color Brown, yellow, red, or green
Crystal habit Prismatic; acicular or asbestiform
Twinning Simple or multiple parallel to {100}
Cleavage Perfect
Fracture Uneven, brittle
Mohs scale hardness 5-6
Luster Vitreous
Streak Pale yellow
Diaphaneity Transparent to translucent
Specific gravity 3.0-3.5
Optical properties Biaxial (-)
Refractive index nα = 1.615 nβ = 1.629 nγ = 1.636
Birefringence δ = 0.021
Pleochroism Strong: pale yellow, orange, and red
2V angle 68° measured
Richterite
Code: 1458
Richterite
Mica quarry, Kovdor massif, Murmansk region, Kola Peninsula, RF
51*26*19mm

0.00 $ $25.00

Richterite archived
Code: 1457
Richterite
Mica quarry, Kovdor massif, Murmansk region, Kola Peninsula, RF
35*21*20mm

0.00 $ $17.33

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