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Achávalite

A valid IMA mineral species - grandfathered
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About AchávaliteHide

03492930014946333498113.jpg
Luis Achával
Formula:
FeSe
Fe may be replaced by minor Cu.
Colour:
dark grey to black
Lustre:
Metallic, Sub-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). The IMA approved name was achavalite (without diacritic) until 2015 when it was changed to achávalite.
Never adequately described, in need of modern reinvestigation.
Massive fine-grained 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.


Unique IdentifiersHide

Mindat ID:
14
Long-form identifier:
mindat:1:1:14:3
GUID
(UUID V4):
000fc41c-f772-466a-a7ef-6db39fba04bd

IMA Classification of AchávaliteHide

Approved, 'Grandfathered' (first described prior to 1959)
IMA status notes:
Renamed by the IMA
First published:
1939
Approval history:
Renamed by IMA in 2015 (IMA 15-E): Spelling changed from achavalite to achávalite.

Classification of AchávaliteHide

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

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
AhvIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of AchávaliteHide

Metallic, Sub-Metallic
Transparency:
Opaque
Colour:
Dark grey to black
Streak:
Grey-black
Hardness:
2½ on Mohs scale
Tenacity:
Brittle
Density:
6.58 g/cm3 (Calculated)

Chemistry of AchávaliteHide

Mindat Formula:
FeSe

Fe may be replaced by minor Cu.

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

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.778 Å(100)
2.159 Å(90)
1.815 Å(70)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
High-𝑇 alteration and/or metamorphism
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12])

Type Occurrence of AchávaliteHide

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)2-x (x ≈ 0.4)Hex.
LangisiteCoAsHex. 6 : P63
NickelineNiAsHex. 6/mmm (6/m 2/m 2/m) : P63/mcm
Sederholmitebeta-NiSeHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
SobolevskitePdBiHex.
StumpflitePtSbHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
SudburyitePdSbHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
VavříniteNi2SbTe2Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
ZlatogoriteNiCuSb2Trig. 3m (3 2/m) : P3 1m

Related Minerals - Strunz-mindat GroupingHide

2.CC.TilkerodeitePd2HgSe3Trig. 3m (3 2/m) : P3m1
2.CC.UM2007-26-S:CuFeIrNiPtRh(Ir,Cu,Ni,Pt,Rh,Fe)9S11
2.CC.Crowningshieldite(Ni0.9Fe0.1)SHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
2.CC.EliopoulositeV7S8Trig. 3 2 : P32 2 1
2.CC.KuvaeviteIr5Ni10S16Trig. 3m (3 2/m) : R3m
2.CC.TorryweiseriteRh5Ni10S16Trig. 3m (3 2/m) : R3m
2.CC.TamuraiteIr5Fe10S16Trig. 3m (3 2/m) : R3m
2.CC.FerrotorryweiseriteRh5Fe10S16Trig. 3m (3 2/m) : R3m
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)2-x (x ≈ 0.4)Hex.
2.CC.05LangisiteCoAsHex. 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.05SobolevskitePdBiHex.
2.CC.05StumpflitePtSbHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
2.CC.05SudburyitePdSbHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
2.CC.05JaipuriteCoSHex.
2.CC.05ZlatogoriteNiCuSb2Trig. 3m (3 2/m) : P3 1m
2.CC.10PyrrhotiteFe1-xSMon.
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. mmm (2/m 2/m 2/m)
2.CC.15Ruthenarsenite(Ru,Ni)AsOrth. mmm (2/m 2/m 2/m) : Pnma
2.CC.15Westerveldite(Fe,Ni,Co)AsOrth. mmm (2/m 2/m 2/m)
2.CC.15MinakawaiteRhSbOrth. mmm (2/m 2/m 2/m) : Pnma
2.CC.20MilleriteNiSTrig. 3m : R3m
2.CC.20Mäkineniteγ-NiSeTrig. 3m
2.CC.20UM1990-38-S:CuFeIrNiPtRh(Ni,Fe,Rh,Cu,Ir,Pt)S
2.CC.25MackinawiteFeSTet. 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.35aBraggitePdPt3S4Tet. 4/m : P42/m
2.CC.35bCooperitePtSTet. 4/mmm (4/m 2/m 2/m) : P42/mmc
2.CC.35aVysotskitePdSTet. 4/m : P42/m
2.CC.45JacutingaitePt2HgSe3Trig. 3m (3 2/m) : P3m1
2.CC.50ImgreiteNiTe (?)Hex.

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.

Internet Links for AchávaliteHide

References for AchávaliteHide

Reference List:

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 references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Argentina
 
  • Mendoza Province
    • Luján de Cuyo department
      • Cacheuta District
Simon et al. (1997)
          • Cerro de Cacheuta
Ahlfeld Friedrich and Angelelll ... +1 other reference
China
 
  • Hubei
    • Enshi Autonomous Prefecture (E'xi Autonomous Prefecture)
      • Enshi Co.
Handong Qian et al. (2006)
 
and/or  
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