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Ophirite

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About OphiriteHide

Formula:
Ca2Mg4[Zn2Mn3+2(H2O)2(Fe3+W9O34)2] · 46H2O
heteropolytungstate
Colour:
orange-brown
Lustre:
Vitreous
Hardness:
2
Specific Gravity:
4.060 (Calculated)
Crystal System:
Triclinic
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.


Classification of OphiriteHide

Approved
Approval Year:
2013

Physical Properties of OphiriteHide

Vitreous
Transparency:
Transparent
Colour:
orange-brown
Streak:
pale orange
Hardness:
Hardness Data:
Measured
Tenacity:
Brittle
Cleavage:
None Observed
Parting:
none
Fracture:
Irregular/Uneven
Density:
4.060 g/cm3 (Calculated)

Optical Data of OphiriteHide

Type:
Biaxial (+)
RI values:
nα = 1.730(3) nβ = 1.735(3) nγ = 1.770(3)
2V:
Measured: 43° (2)
Max Birefringence:
δ = 0.040
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r > v strong
Pleochroism:
Visible
Comments:
X = light orange brown, Y = light orange brown, Z = orange brown; X < Y << Z

Chemical Properties of OphiriteHide

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

heteropolytungstate
IMA Formula:
Ca2Mg4[Zn2Mn3+2(H2O)2(Fe3+W9O34)2] · 46H2O

Crystallography of OphiriteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Setting:
P1
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
Unit Cell V:
2370.35 ų
Z:
1
Morphology:
Tablets on {001} with irregular {100} and {110} bounding forms.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
16.72Å(38)
11.33Å(91)
10.69Å(100)
8.27Å(55)
5.44Å(33)
2.992Å(75)
2.760Å(55)
2.594Å(33)

Type Occurrence of OphiriteHide

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

Fluorescence of OphiriteHide

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

Other InformationHide

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

References for OphiriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Kampf, A.R., Hughes, J.M., Marty, J., Nash, B.P., Wright, S.E. (2013) Ophirite, IMA 2013-017. CNMNC Newsletter No. 16, 2013, page 2704. Mineralogical Magazine: 77: 2695-2709.
Kampf, A.R., Hughes, J.M., Nash, B.P., Wright, S., 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: 1045-1051.

Internet Links for OphiriteHide

Localities for OphiriteHide

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

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
USA (TL)
 
  • Utah
    • Tooele Co.
      • Oquirrh Mountains
        • Ophir Mining District
          • Ophir
Kampf, A.R., Hughes, J.M., Marty, J., Nash, B.P. and Wright, S.E. (2013) Ophirite, IMA 2013-017. CNMNC Newsletter No. 16, 2013, page 2704, Mineralogical Magazine, 77, 2695-2709
 
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