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Hastite

Formula:
CoSe
 
2
System:OrthorhombicHardness:6


Originally reported from Trogtal Quarries, Lautenthal, Harz Mts, Lower Saxony, Germany.

Classification of Hastite

IMA status:Discredited 2008
Explanation of status:Type material proved to be ferroselite.
Strunz 8th edition ID:2/D.20-30

2 : Sulphides
D : Sulphides with metal: sulphur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold
20 : Markasite - Iridarsenite series
Hey's CIM Ref.:3.10.7

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

Hardness (Mohs):6

Crystallography of Hastite

Crystal System:Orthorhombic
Cell Parameters:a = 3.6Å, b = 4.84Å, c = 5.72Å
Ratio:a:b:c = 0.744 : 1 : 1.182
Unit Cell Volume:V 99.67 ų (Calculated from Unit Cell)

Chemical Properties of Hastite

Formula:
CoSe
 
2
Essential elements:Co, Se
All elements listed in formula:Co, Se

Relationship of Hastite to other Species

Related Minerals - Strunz Grouping):

- +
2/D.20-10Marcasite
FeS
 
2
2/D.20-20Ferroselite
FeSe
 
2
2/D.20-40Kullerudite
NiSe
 
2
2/D.20-50Frohbergite
FeTe
 
2
2/D.20-60Mattagamite
CoTe
 
2
2/D.20-70Anduoite
(Ru,Os)As
 
2
2/D.20-80Omeiite
(Os,Ru)As
 
2
2/D.20-90Iridarsenite
(Ir,Ru)As
 
2
Related Minerals - Hey's Index Grouping:

- +
3.10.1Cobaltpentlandite
(Co,Ni,Fe)
 
9
S
 
8
3.10.2Linnaeite
Co
2+
 
Co
3+
2
S
 
4
3.10.3Cattierite
CoS
 
2
3.10.4Freboldite
CoSe
3.10.5Bornhardtite
Co
2+
 
Co
3+
2
Se
 
4
3.10.6Trogtalite
CoSe
 
2
3.10.8Mattagamite
CoTe
 
2
3.10.9Modderite
(Co,Fe)As
3.10.10Safflorite
(Co,Fe,Ni)As
 
2
3.10.11Clinosafflorite
(Co,Fe,Ni)As
 
2
3.10.12Skutterudite
(Co,Fe,Ni)As
 
2-3
3.10.13Cobaltite
CoAsS
3.10.14Paracostibite
CoSbS
3.10.15Costibite
CoSbS
3.10.16Alloclasite
(Co
 
0.65
Fe
 
0.35
)AsS - CoAsS
3.10.17Glaucodot
(Co
 
0.50
Fe
 
0.50
)AsS
3.10.18Carrollite
Cu(Co,Ni)
 
2
S
 
4

Other Names for Hastite

Other Languages:
German:Hastit
Russian:Хастит
Spanish:Hastita

Other Information

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

References for Hastite

Reference List:American Mineralogist: 41: 164.

http://www.geo.vu.nl/users/ima-cnmmn/minerals08-04.pdf

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    Localities for Hastite

    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Germany
     
    • Lower Saxony
      • Harz Mts
        • Lautenthal
    		Weiss: "Mineralfundstellen, Deutschland West", 1990
    • Saxony-Anhalt
      • Harz Mts
    		Wittern: "Mineralfundorte in Deutschland", 2001
    Mineral and/or Locality
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