Ophirite (original) (raw)

A valid IMA mineral species

About OphiriteHide

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Formula:

Ca2Mg4[Zn2Mn3+2(H2O)2(Fe3+W9O34)2] · 46H2O

Specific Gravity:

4.060 (Calculated)

Name:

Names for the type locality, Ophir Hill Consolidated mine, Ophir District, Oquirrh Mountains, Tooele County, Utah

Ophirite is the first known mineral to contain a lacunary defect derivative of the Keggin anion, a heteropolyanion that is well known in synthetic phases.

Awarded 'Mineral of the Year' by the IMA-CNMNC in 2014.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:43845:8

6349bccd-5200-43ea-9916-3ad1f0022390

IMA Classification of OphiriteHide

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IMA Formula:

Ca2Mg4[Zn2Mn3+2(H2O)2(Fe3+W9O34)2] · 46H2O

Classification of OphiriteHide

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7.GB.80

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
G : Molybdates, Wolframates and Niobates
B : With additional anions and/or H2O

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 OphiriteHide

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Fracture:

Irregular/Uneven

Density:

4.060 g/cm3 (Calculated)

Optical Data of OphiriteHide

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RI values:

_n_α = 1.730(3) _n_β = 1.735(3) _n_γ = 1.770(3)

δ = 0.040

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Comments:

X = light orange brown, Y = light orange brown, Z = orange brown; X < Y << Z

Chemistry of OphiriteHide

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Mindat Formula:

Ca2Mg4[Zn2Mn3+2(H2O)2(Fe3+W9O34)2] · 46H2O

heteropolytungstate

Crystallography of OphiriteHide

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Class (H-M):

1 - Pinacoidal

Cell Parameters:

a = 11.9860(2) Å, b = 13.2073(2) Å, c = 17.689(1) Å
α = 69.690(5)°, β = 85.364(6)°, γ = 64.875(5)°

Ratio:

a:b:c = 0.908 : 1 : 1.339

Morphology:

Tablets on {001} with irregular {100} and {110} bounding forms.

Crystal StructureHide

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X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Type Occurrence of OphiriteHide

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General Appearance of Type Material:

orange-brown tablets on {001} with irregular {100} and {110} bounding forms. Individual crystals up to about 1mm in maximum dimension.

Place of Conservation of Type Material:

Cotype specimens - Natual History Museum of Los Angeles County, Los Angeles, California, catalog numbers 64029 and 64030

Synonyms of OphiriteHide

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Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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Fluorescence of OphiriteHide

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Does not fluoresce in short- or long-wave ultraviolet radiation

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 OphiriteHide

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References for OphiriteHide

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Reference List:

Kampf, A. R., Hughes, J. M., Nash, B. P., Wright, S. E., Rossman, G. R., Marty, J. (2014) Ophirite, Ca2Mg4[Zn2Mn3+2(H2O)2(Fe3+W9O34)2]·46H2O, a new mineral with a heteropolytungstate tri-lacunary Keggin anion. American Mineralogist, 99 (5) 1045-1051 doi:10.2138/am.2014.4699

Localities for OphiriteHide

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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.