Magnetite

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Magnetite
Magnetite-118736.jpg
Magnetite frae Bolivie
General
Category
Formula
(repeatin unit)
iron(II,III) oxide, Fe2+Fe3+2O4
Strunz clessification4.BB.05
Creestal seestemIsometric
Creestal clessHexoctahedral (m3m)
H-M seembol: (4/m 3 2/m)
Space groupFd3m
Unit cella = 8.397 Å; Z = 8
Identification
ColourBlack, gray wi brounish tint in reflectit sun
Creestal habitOctahedral, fine granular tae massive
TwinninOn {Ill} as baith twin an composeetion plane, the spinel law, as contact twins
CleavageIndistinct, pairtin on {Ill}, verra guid
FracturUneven
TenacityBrittle
Mohs scale haurdness5.5–6.5
SkinkleMetallic
StreakBlack
DiaphaneityOpaque
Speceefic gravity5.17–5.18
SolubilityDissolves slowly in hydrochloric acid
References[1][2][3][4]
Major varieties
LodestaneMagnetic wi definite north an sooth poles

Magnetite is a rock mineral an ane o the main airn ures.

References[eedit | eedit soorce]

  1. Handbook of Mineralogy
  2. Mindat.org Mindat.org
  3. Webmineral data
  4. Hurlbut, Cornelius S.; Klein, Cornelis (1985). Manual of Mineralogy (20th ed.). Wiley. ISBN 0-471-80580-7.