Willyamite (original) (raw)

A valid IMA mineral species - grandfathered

About WillyamiteHide

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May contain variable amounts of Ni substituting for Co.

Colour:

Tin-white, steel-gray

Name:

For the type locality, Willyama Township, New South Wales, Australia. Willyama was the original Aboriginal name of Broken Hill.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:4295:2

b8f012f2-7677-40c6-92c2-fe501f707dbf

IMA Classification of WillyamiteHide

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Approved, 'Grandfathered' (first described prior to 1959)

IMA status notes:

Redefined by the IMA

Type description reference:

Classification of WillyamiteHide

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2.EB.25

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
E : Metal Sulfides, M: S <= 1:2
B : M:S = 1:2, with Fe, Co, Ni, PGE, etc.

2.12.3.4

2 : SULFIDES
12 : AmBnXp, with (m+n):p = 1:2

3.11.39

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

Mineral SymbolsHide

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

Physical Properties of WillyamiteHide

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Colour:

Tin-white, steel-gray

Comment:

Slightly harder than ullmannite.

Fracture:

Irregular/Uneven

Density:

6.76(3) g/cm3 (Measured)

Chemistry of WillyamiteHide

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Mindat Formula:

CoSbS

May contain variable amounts of Ni substituting for Co.

Crystallography of WillyamiteHide

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Cell Parameters:

a = 5.86 Å

Morphology:

Zoned crystals to several mm.

Comment:

Symmetry and space group unknown, but probably monoclinic or triclinic. Pseudocubic; a ~ b ~ c within error limits.

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Geological Setting:

Calcite - siderite veins.

Type Occurrence of WillyamiteHide

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General Appearance of Type Material:

Crystals several mm on a side, showing zonal growth patterns.

Place of Conservation of Type Material:

National Museum of Natural History, Washington, D.C., USA, R849A.

Associated Minerals at Type Locality:

Reference:

Cabri, L.J., Harris, D.C., Stewart, J.M., Rowland, J.F. (1970): Willyamite redefined. Proceedings of the Australasian Institute of Mining and Metallurgy 233, 95-100.

Other Language Names for WillyamiteHide

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Relationship of Willyamite to other SpeciesHide

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Other Members of this group:

Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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Other InformationHide

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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 WillyamiteHide

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References for WillyamiteHide

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Localities for WillyamiteHide

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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

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- 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.