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|System:||Orthorhombic||Hardness:||5½ - 6|
In technical iron alloys, cohenite is well-known as a synthetic phase and is called cementite.
Classification of Cohenite
|IMA status:||Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"|
|Strunz 8th edition ID:||1/A.09-50|
|Nickel-Strunz 10th (pending) edition ID:||1.BA.05|
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
B : Metallic Carbides, Silicides, Nitrides and Phosphides
A : Carbides
|Dana 7th edition ID:||22.214.171.124|
|Dana 8th edition ID:||126.96.36.199|
1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group
|Hey's CIM Ref.:||2.11|
2 : Carbides, Nitrides, Silicides and Phosphides
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Type Occurrence of Cohenite
|Type Locality:||Magura meteorite, Slanica, Námestovo, Námestovo Co., Žilina Region, Slovakia|
|Year of Discovery:||1889|
Physical Properties of Cohenite
|Hardness (Mohs):||5½ - 6|
Crystallography of Cohenite
|Cell Parameters:||a = 5.09Å, b = 6.74Å, c = 4.52Å|
|Ratio:||a:b:c = 0.755 : 1 : 0.671|
|Unit Cell Volume:||V 155.07 Å³ (Calculated from Unit Cell)|
Chemical Properties of Cohenite
|Simplified for copy/paste:||(Fe,Ni,Co)3C|
|Essential elements:||C, Fe|
|All elements listed in formula:||C, Co, Fe, Ni|
Relationship of Cohenite to other Species
|Related Minerals - Nickel-Strunz Grouping):|
|Related Minerals - Hey's Index Grouping:|
Other Names for Cohenite
|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 Cohenite
Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Seventh edition, Volume I: 122-123.
Transactions of the Royal Society of London: A286: 453-491.
Internet Links for Cohenite
Localities for Cohenite
The 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.
(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.
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Locality Updated: Trelissick Dyke, Feock, Wendron & Falmouth District, Cornwall, England, UKFrom Peter Haas, 2nd Sep 2014 16:55:59