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Diameter, mm (1mm - 0,039inch)

Collectible minerals - full range in stock "Lepidolite"

Lepidolite is a mineral of the mica group. It has, like all micas, a layered structure, with which its name is associated: it comes from the Greek "scales". Lepidolite occurs in pegmatites. Rich in lithium. In addition, it is a source of rubidium and cesium. Moreover, the chemical element rubidium was discovered while studying this mineral. Currently, lepidolite is excluded from the official IMA list of minerals, but in practice this name is still used to refer to light-colored micas rich in lithium when it is not possible to diagnose them more precisely.

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

Physical properties of Lepidolite

General
Category Phyllosilicate
Formula
(repeating unit)
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
IMA symbol Lpd
Strunz classification 9.EC.20
Crystal system Monoclinic
Crystal class Prismatic (2/m)
(same H-M symbol)
Space group C2/m, Cm
Unit cell a = 5.209(2) Å, b = 9.011(5) Å,
c = 10.149(5) Å;
β = 100:77(4)°; Z = 2
Identification
Color Pink, light purple, purple, rose-red, violet-gray, yellowish, white, colorless other colors possible but are rare.
Crystal habit Tabular to prismatic pseudohexagonal crystals, scaly aggregates and massive
Twinning Rare, composition plane {001}
Cleavage {001} perfect
Fracture Uneven
Mohs scale hardness 2.5–3
Luster Vitreous to pearly
Streak White
Diaphaneity Transparent to translucent
Specific gravity 2.8–2.9
Optical properties Biaxial (-)
Refractive index nα=1.525–1.548, nβ=1.551–1.58, nγ=1.554–1.586
Birefringence 0.0290–0.0380
Pleochroism X = almost colorless; Y = Z = pink, pale violet
2V angle 0° - 58° measured

Code: 192
Lipovka deposit, Middle Urals, RF
105*56*50mm

0.00 $ $54.44

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