Magnesite

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Magnesite
Magnesite.jpg
Magnesite frae Bahia, Brazil (9.7 x 7.1 x 6 cm)
General
CategoryCarbonate mineral
Formula
(repeatin unit)
MgCO3
Strunz clessification05.AB.05
Creestal seestemTrigonal - Hexagonal Scalenohedral H-M Seembol 32/m Space Group: R3c
Identification
ColourColourless, white, fauch yellae, fauch broun, faint pink, lilac-rose
Creestal habitUisually massive, rare as rhombohedrons or hexagonal prisms
Cleavage[1011] perfect
FracturConchoidal
TenacityBrickle
Mohs scale haurdness3.5 - 4.5
SkinkleVitreous
Streakwhite
DiaphaneitySkyre tae leamin
Speceefic gravity3.0 - 3.2
Optical propertiesUniaxial (-)
Refractive indexnω=1.508 - 1.510 nε=1.700
Birefringence0.191
Fusibilityinfusible
SolubilityEffervesces in het HCl
Ither chairacteristicsMay 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