1) Cubic mineral 2) Iron mineral 3) Mineral 4) Sulfide mineral
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https://www.crosswordclues.com/clue/pentlandite
Pentlandite is an iron-nickel sulfide, (Fe,Ni)9S8. Pentlandite has a narrow variation range in Ni:Fe but it is usually described as having a Ni:Fe of 1:1. It also contains minor cobalt, usually at low wt% levels. Pentlandite forms isometric crystals, but it is normally found in massive granular aggregates. It is brittle with a hardness of 3.5 - 4 ...
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http://en.wikipedia.org/wiki/Pentlandite
A common sulphide ore of nickel, FeNiS.
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http://www.australian-shares.com/glossary-of-terms.php.html
a nickel and iron sulfide mineral, the chief source of nickel. It is nearly always found with pyrrhotite and similar minerals in silica-poor rocks ... [2 related articles]
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http://www.britannica.com/eb/a-z/p/40
Pentlandite is the most important industrial source of nickel and has the formulae (Fe,Ni)9S8 and a relative hardness of 4. Pentlandite was confirmed as a distinct species in 1856 and named after Joseph Pentland, the discoverer of it.
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http://www.probertencyclopaedia.com/browse/HP.HTM
[
n] - a mineral (iron-nickel sulphide) that is the chief ore of nickel
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http://www.webdictionary.co.uk/definition.php?query=pentlandite
noun a mineral (iron and nickel sulphide) that is the chief ore of nickel
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https://www.encyclo.co.uk/local/20974
Nickel iron sulphide, the most common nickel ore.
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https://www.encyclo.co.uk/local/22709
Nickel iron sulphide, the most common nickel ore.
Found on
https://www.encyclo.co.uk/local/22733
Nickel iron sulfide, the most common nickel ore.
Found on
https://www.encyclo.co.uk/local/22734
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