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Bravoite

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Formula:
(Fe,Ni)S2
System:
Isometric
Colour:
Steel gray
Lustre:
Metallic
Hardness:
Name:
Named after the Peruvian scientist, Jose J. Bravo (1874-1928).
A variety of Pyrite

A nickeloan variety of pyrite.
Compare the nickel analogue of pyrite, vaesite.

Originally reported from Ragra Mine (Minasragra), Junín, Cerro de Pasco, Alcides Carrión Province, Pasco Department, Peru.


Classification of Bravoite

Discredited
2/0.0-00

2 : Sulphides
0 :
0 :
3.11.10

3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
11 : Sulphides etc. of Ni
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Physical Properties of Bravoite

Metallic
Diaphaneity (Transparency):
Opaque
Colour:
Steel gray
Streak:
Black
Hardness (Mohs):
Hardness (Vickers):
VHN100=889 - 927 kg/mm2
Tenacity:
Brittle
Cleavage:
Distinct/Good
{001}
Fracture:
Irregular/Uneven, Conchoidal
Density:
4.62 - 4.72 g/cm3 (Measured)    100 g/cm3 (Calculated)

Crystallography of Bravoite

Crystal System:
Isometric
Class (H-M):
m3 (2/m 3) - Diploidal
Space Group:
Pa3
Space Group Setting:
Pa3
Cell Parameters:
a = 5.57Å
Unit Cell Volume:
V 172.81 ų (Calculated from Unit Cell)
Z:
4

Chemical Properties of Bravoite

Formula:
(Fe,Ni)S2
Essential elements:
All elements listed in formula:

Relationship of Bravoite to other Species

2/0.0-Jeromite
2/0.0-SpeculiteAuTe2
2/0.0-Wurtzite GroupMX
2/0.0-Schlemaite(Cu,◻)6(Pb,Bi)Se4
2/0.0-WilhelmramsayiteCu3FeS3·2H2O
2/0.0-Britvinite[Pb7(OH)3F(BO3)2(CO3)][Mg4.5(OH)3(Si5O14)]
3.11.1HeazlewooditeNi3S2
3.11.2Godlevskite(Ni,Fe)9S8
3.11.3MilleriteNiS
3.11.4PolydymiteNi2+Ni23+S4
3.11.5VaesiteNiS2
3.11.6ShanditeNi3Pb2S2
3.11.7DonharrisiteNi8Hg3S9
3.11.8ViolariteFe2+Ni23+S4
3.11.9Pentlandite(Fe,Ni)9S8
3.11.11SiegeniteCoNi2S4
3.11.12FletcheriteCu(Ni,Co)2S4
3.11.13Villamaninite(Cu,Ni,Co,Fe)S2
3.11.14Mäkineniteγ-NiSe
3.11.15Sederholmitebeta-NiSe
3.11.16TrüstedtiteNi3Se4
3.11.17WilkmaniteNi3Se4
3.11.18KulleruditeNiSe2
3.11.19Penroseite(Ni,Co,Cu)Se2
3.11.20TyrrelliteCu(Co3+,Ni3+)2Se4
3.11.21ImgreiteNiTe (?)
3.11.22MeloniteNiTe2
3.11.23KitkaiteNiTeSe
3.11.24Dienerite
3.11.25OrceliteNi5-xAs2, x ~ 0.25
3.11.26MaucheriteNi11As8
3.11.27NickelineNiAs
3.11.28RammelsbergiteNiAs2
3.11.29PararammelsbergiteNiAs2
3.11.30NickelskutteruditeNiAs3-x
3.11.31OregoniteNi2FeAs2
3.11.32Westerveldite(Fe,Ni,Co)As
3.11.33Langisite(Co,Ni)As
3.11.34GersdorffiteNiAsS
3.11.35JolliffeiteNiAsSe
3.11.36BreithauptiteNiSb
3.11.38UllmanniteNiSbS
3.11.39Willyamite(Co,Ni)SbS

Other Names for Bravoite

Name in Other Languages:

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Bravoite

Reference List:
Hillebrand (1907), American Journal mof Science: 24: 149.

Henglein (1914), Cbl. Min.: 129 (as kobaltnickelpyrit).

Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 290-291.

Petruk, W., Harris, D.C., and Stewart, J.M. (1969) Langisite, a new mineral, and the rare minerals cobalt pentlandite, siegenite, parkerite, and bravoite from the Langis mine, Cobalt-Gowganda area, Ontario, Canada. Canadian Mineralogist: 9: 597-605.

Klemm, D. (1962): Untersuchungen über die Mischkristallbildung im Dreiecksdiagramm FeS2-CoS2-NiS2 und ihre Beziehungen im Aufbau der natürlichen "Bravoite", Neues Jahrbuch für Mineralogie, Monatshefte, 1962, 76-91.

Bayliss, P. (1989): Crystal chemistry and crystallography of some minerals within the pyrite group, American Mineralogist, 74, 1168-1176.

Internet Links for Bravoite

Localities for Bravoite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
Mineral and/or Locality  
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