Warwickite
(Mg,Fe2+)3Ti[O,BO3]2IMA symbol Wwk[1] Strunz classification 6.AB.20 Crystal system Orthorhombic Crystal class Dipyramidal (mmm)
H-M symbol: (2/m 2/m 2/m) Space group Pnam Identification Color dark brown, grey to black¨ Cleavage perfect on {100} Fracture irregular/uneven Mohs scale hardness 3-4 Luster sub-Vitreous, pearly, sub-metallic, dull Streak bluish black Specific gravity 3.34 - 3.36 References [2] Oxide minerals
Silicate minerals Other
H-M symbol: (2/m 2/m 2/m)
Warwickite is an iron magnesium titanium borate mineral with the chemical formula (MgFe)3Ti(O, BO3)2 or Mg(Ti,Fe3+, Al)(BO3)O. It occurs as brown to black prismatic orthorhombic crystals which are vitreous and transparent. It has a Mohs hardness of 3 to 4 and a specific gravity of 3.36.[3][4]
Occurrence
It occurs metasomatized limestone skarns and in lamproite and carbonatite veinlets. It was first described in 1838 near Warwick, Orange County, New York. It has also been reported from Bancroft, Ontario; in Murcia Province, Spain; in Siberia and near Pyongyang, North Korea.[5]
References
- ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
- ^ Mineralienatlas
- ^ http://webmineral.com/data/Warwickite.shtml Webmineral
- ^ http://www.mindat.org/min-4245.html Mindat
- ^ http://rruff.geo.arizona.edu/doclib/hom/warwickite.pdf Handbook of Mineralogy
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Titanium minerals
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Mixed |
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- Sabinaite (carbonate mineral)
- Warwickite (borate mineral)
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