Mineral Information and Data:

Apuanite
Fe3+4Fe2+Sb3+4O12S [CNMNC approved formula]

Named for the locality: Buca della Vena mine, northeast of Stazzema, Apuan Alps, Tuscany, Italy.

IMA status : Approved Species 1978 (IMA1978-069)
CLASSIFICATION 
Dana
(8th edition) :
45.01.09.01  
  (45) Acid and normal Antimonites, Arsenites and Phosphites
  (45.01) with miscellaneous formulae
  (45.01.09)
  
Nickel-Strunz
(10th edition) :
04.JA.25
  (04) Oxides and Hydroxides
  (04.J) Arsenites, Antimonites, Bismuthites, Sulfites,
  (04.JA) Arsenites, antimonites, bismuthites; without additional anions, without H2O
  
Crystal system: Tetragonal System
Point group (H-M): 4/mmm (or 4/m 2/m 2/m) — ditetragonal-dipyramidal
Unit cell: a = 8.372 Å, c = 17.974 Å
Crystal Habit: Crystals platy or tabular; commonly massive aggregates
  
Color: Black
Diaphaneity: Opaque
Luster: Metallic
Hardness (Mohs): 4
Measured Density: 5.33 g/cm3
Cleavage: 1; {110} perfect
Streak: Black
  
Geologic Setting: In an iron deposit in barite formed by low-grade metasomatic processes at the contact between phyllites and dolostones.
Mineral Association: Versiliaite, barite, magnetite, hematite, pyrite
  

 

Apuanite
Origin: Buca della Vena Mine, Stazzema (Ponte Stazzemese) , Versilia, Apuan Alps, Lucca Province, Tuscany, Italy
Picture size: 1.2 mm
Photo and Owner: Thomas Witzke

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