Magnesite

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Magnesite
Magnesite.jpg
Magnesite frae Bahia, Brazil (9.7 x 7.1 x 6 cm)
General
Category Carbonate mineral
Formula
(repeatin unit)
MgCO3
Strunz clessification 05.AB.05
Creestal seestem Trigonal - Hexagonal Scalenohedral H-M Seembol 32/m Space Group: R3c
Identification
Colour Colourless, white, fauch yellae, fauch broun, faint pink, lilac-rose
Creestal habit Uisually massive, rare as rhombohedrons or hexagonal prisms
Cleavage [1011] perfect
Fractur Conchoidal
Tenacity Brickle
Mohs scale haurdness 3.5 - 4.5
Skinkle Vitreous
Streak white
Diaphaneity Skyre tae leamin
Speceefic gravity 3.0 - 3.2
Optical properties Uniaxial (-)
Refractive index nω=1.508 - 1.510 nε=1.700
Birefringence 0.191
Fusibility infusible
Solubility Effervesces in het HCl
Ither chairacteristics May exhibit fauch green tae fauch blae fluorescence an phosphorescence unner UV; triboluminescent
References [1][2][3][4]

Magnesite is a mineral wi the chemical formula MgCO3 (magnesium carbonate).

References[eedit | eedit soorce]

  1. http://rruff.geo.arizona.edu/doclib/hom/magnesite.pdf Handbook of Mineralogy
  2. http://www.mindat.org/min-2482.html Mindat.org
  3. http://webmineral.com/data/Magnesite.shtml Webmineral data
  4. Klein, Cornelis and Cornelius S. Hurlbut, Jr., Manual of Mineralogy, Wiley, 20th ed., p. 332 ISBN 0-471-80580-7