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Achávalite

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Luis Achával
Formula:
(Fe,Cu)Se
Colour:
dark grey
Lustre:
Metallic
Hardness:
Specific Gravity:
6.58 (Calculated)
Crystal System:
Hexagonal
Member of:
Name:
Named after Luis Achával (June 8 1870, Córdoba - March 20, 1938), civil engineer. Professor at Universidad Nacional de Córdoba. Author of "Geografia de Córdoba" with Manuel Rio and president of Academia de Ciencia (Academy of Science).
Never adequately described, in need of modern reinvestigation.
Massive granular.

A phase "Fe(Se,S)" is reported by Yakovleva et al. (2001).

The Fe analogue of freboldite; chemically also the Fe analogue of klockmannite, and sederholmite (all have the same space group). Also chemically the Se-analogue of troilite.


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Classification of AchávaliteHide

Approved, 'Grandfathered' (first described prior to 1959)
Notes:
Renamed by the IMA
First Published:
1939
Approval History:
Renamed by IMA in 2015 (IMA 15-E): Spelling changed from achavalite to achávalite.
2.CC.05

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
C : Metal Sulfides, M: S = 1: 1 (and similar)
C : With Ni, Fe, Co, PGE, etc.
3.9.8

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

Physical Properties of AchávaliteHide

Metallic
Transparency:
Opaque
Colour:
dark grey
Streak:
grey-black
Hardness:
2½ on Mohs scale
Density:
6.58 g/cm3 (Calculated)

Chemical Properties of AchávaliteHide

Formula:
(Fe,Cu)Se
IMA Formula:
FeSe

Crystallography of AchávaliteHide

Crystal System:
Hexagonal
Class (H-M):
6/mmm (6/m 2/m 2/m) - Dihexagonal Dipyramidal
Space Group:
P63/mmc
Setting:
P63/mmc
Cell Parameters:
a = 3.636 Å, c = 5.946 Å
Ratio:
a:c = 1 : 1.635
Unit Cell V:
68.08 ų
Z:
2

Type Occurrence of AchávaliteHide

Geological Setting of Type Material:
selenide deposit
Associated Minerals at Type Locality:

Synonyms of AchávaliteHide

Other Language Names for AchávaliteHide

German:Achavalit
Simplified Chinese:硒铁矿
Spanish:Achavalita

Relationship of Achávalite to other SpeciesHide

Member of:
Other Members of this group:
BreithauptiteNiSbHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
FrebolditeCoSeHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
KotulskitePd(Te,Bi)Hex.
Langisite(Co,Ni)AsHex. 6 : P63
NickelineNiAsHex. 6/mmm (6/m 2/m 2/m) : P63/mcm
SobolevskitePd(Bi,Te)Hex.
Sudburyite(Pd,Ni)SbHex.

Related Minerals - Nickel-Strunz GroupingHide

2.CC.UM2007-26-S:CuFeIrNiPtRh(Ir,Cu,Ni,Pt,Rh,Fe)9S11
2.CC.05BreithauptiteNiSbHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
2.CC.05FrebolditeCoSeHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
2.CC.05KotulskitePd(Te,Bi)Hex.
2.CC.05Langisite(Co,Ni)AsHex. 6 : P63
2.CC.05NickelineNiAsHex. 6/mmm (6/m 2/m 2/m) : P63/mcm
2.CC.05Sederholmitebeta-NiSeHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
2.CC.05SobolevskitePd(Bi,Te)Hex.
2.CC.05StumpflitePt(Sb,Bi)Hex.
2.CC.05Sudburyite(Pd,Ni)SbHex.
2.CC.05JaipuriteCoSHex.
2.CC.05ZlatogoriteNiCuSb2Trig.
2.CC.10PyrrhotiteFe7S8Mon.
2.CC.10Smythite(Fe,Ni)3+xS4 (x=0-0.3)Trig. 3m (3 2/m) : R3m
2.CC.10TroiliteFeSHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
2.CC.15CherepanoviteRhAsOrth. mmm (2/m 2/m 2/m) : Pnma
2.CC.15Modderite(Co,Fe)AsOrth.
2.CC.15Ruthenarsenite(Ru,Ni)AsOrth.
2.CC.15Westerveldite(Fe,Ni,Co)AsOrth.
2.CC.20MilleriteNiSTrig. 3m : R3m
2.CC.20Mäkineniteγ-NiSeTrig.
2.CC.20UM1990-38-S:CuFeIrNiPtRh(Ni,Fe,Rh,Cu,Ir,Pt)S
2.CC.25Mackinawite(Fe,Ni)9S8Tet. 4/mmm (4/m 2/m 2/m) : P4/nmm
2.CC.30Hexatestibiopanickelite(Pd,Ni)(Sb,Te)Hex.
2.CC.30VavříniteNi2SbTe2Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
2.CC.35aBraggite(Pt,Pd,Ni)STet.
2.CC.35bCooperitePtSTet. 4/mmm (4/m 2/m 2/m) : P42/mmc
2.CC.35aVysotskite(Pd,Ni)STet.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

3.9.1PyrrhotiteFe7S8Mon.
3.9.3PyriteFeS2Iso. m3 (2/m 3) : Pa3
3.9.4MarcasiteFeS2Orth. mmm (2/m 2/m 2/m) : Pnnm
3.9.5GreigiteFe2+Fe3+2S4Iso. m3m (4/m 3 2/m) : Fd3m
3.9.6Mackinawite(Fe,Ni)9S8Tet. 4/mmm (4/m 2/m 2/m) : P4/nmm
3.9.7Smythite(Fe,Ni)3+xS4 (x=0-0.3)Trig. 3m (3 2/m) : R3m
3.9.9FerroseliteFeSe2Orth. mmm (2/m 2/m 2/m) : Pnnm
3.9.10FrohbergiteFeTe2Orth. mmm (2/m 2/m 2/m) : Pnnm
3.9.11LöllingiteFeAs2Orth. mmm (2/m 2/m 2/m) : Pnnm
3.9.12ArsenopyriteFeAsSMon. 2/m : P21/b
3.9.13GudmunditeFeSbSMon. 2/m : P21/b

Other InformationHide

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 AchávaliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Olsacher J (1939) Achavalita, seleniuro de hierro. Nueva especie mineral. Boletin de la Facultad de Ciencias Exactas, Fisicas y Naturales, Universidad Nacional de Cordoba, Argentina 2, 73-78
Min. Abs. (1953), 12, 236.
Bernardini, G.P., Mazzetti, G. (1979) Phase relations in the copper-iron-selenium system at 900 and 700C. Rendiconti della Societa Italiana di Mineralogia e Petrologia: 35: 71-90.
Franz, E.D. (1972) X-ray diffraction data on mixed phases in the pyrite (FeS2)-ferroselite (FeSe2)/pyrrhotite (FeS)-achavalite (FeSe) system. Neues Jahrbuch für Mineralogie, Monatshefte: 1972: 276-280.
Strunz, H., Nickel, E.H. (2001) Strunz Mineralogical Tables. Ninth Edition. Schweizerbart, Stuttgart.
Yakovleva, V.A., Nesterov, A.R., Belogub, E.V., Novoselov, K.A. (2001) Secondary sulfides, selenides and arsenides in the supergene zone of Zapadno-Ozernoe massive sulfide deposit, South Urals. Vestnik Sankt-Peterburgskogo Universiteta, Seriya 7: Geologiya, Geografiya: 2001: 3: 73-79. [in Russian]
Brodtkorb, M.K. (2002) Las Especies Minerales de la República Argentina (1. edition) Asociación Mineralógica Argentina, Buenos Aires.
Wyckoff, R.W.G (1963): Crystal Structures: 1: 85-237 (Second edition). Interscience Publishers, New York.

Internet Links for AchávaliteHide

Localities for AchávaliteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Argentina
 
  • Mendoza
    • Luján de Cuyo department
      • Cacheuta
Econ Geol (1997) 92:468-484
          • Cerro de Cacheuta
[Clark, 1993 - "Hey's Mineral Index, 3rd Edition"]; Ahlfeld Friedrich and Angelelll Vlctorio 1948 Las especies minerales de la Republica Argentina Univ Nac Tucumftn Inst Geologla y Mineria Jujuy Pub no 458 p 47 48 49 50 54 67 69 70 71 120 121 133 134
China
 
  • Hubei Province
    • Enshi Autonomous Prefecture (E'xi Autonomous Prefecture)
      • Enshi Co.
Handong Qian, Zhenghua Zhao, Xiang Zheng, Chengyi Lin, Jiahu Zeng, Xuemei Wu, and Wu Chen (2006): Acta Geologica Sinica 80(11), 1706-1710
Mineral and/or Locality  
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