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

Fluorescent Minerals (UV) "Ankerite"

Ankerite is a mineral belonging to the dolomite group. The extreme member of the isomorphic series of dolomite-ankerite. Found in hydrothermal deposits. The crystals have a lentil-like shape. Also found in solid masses. Named after M.Y. Anker - Austrian mineralogist.

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

Physical properties of Ankerite

General
Category Carbonate mineral
Formula
(repeating unit)
Ca(Fe,Mg,Mn)(CO3)2
IMA symbol Ank
Strunz classification 5.AB.10
Crystal system Trigonal
Crystal class Rhombohedral (3)
H-M symbol: (3)
Space group R3
Unit cell a = 4.8312(2)
c = 16.1663(3) [Å]; Z = 3
Identification
Color Brown, yellow, white
Crystal habit Chrystals rhombohedral with curved faces; columnar, stalactitic, granular, massive
Twinning Simple t {0001}, {1010}. {1120}
Cleavage Perfect on {1011}
Fracture Subconchoidal
Tenacity Brittle
Mohs scale hardness 3.5–4
Luster Vitreous to pearly
Streak White
Diaphaneity Translucent to transparent
Specific gravity 2.93–3.10
Optical properties Uniaxial (-)
Refractive index nω = 1.690 - 1.750 nε = 1.510 - 1.548
Birefringence δ = 0.180 - 0.202
Dispersion Strong
Code: 1300
Murzinskoye (Au) field, Altai, RF
40*35*/25mm

0.00 $ $42.55

Code: 1301
Murzinskoye (Au) field, Altai, RF
38*26*18mm

0.00 $ $42.55

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