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Oxycalcioroméite

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About OxycalcioroméiteHide

Formula:
Ca2Sb2O6O
Colour:
Reddish-brown
Lustre:
Vitreous, Resinous
Specific Gravity:
5.393 (Calculated)
Crystal System:
Isometric
Name:
Named according to the recommended pyrochlore supergroup nomenclature (Atencio et al. 2010), indicating dominant elements and its relation to other roméite group minerals.
The Ca analogue of cuproroméite and oxyplumboroméite. One of the most simple Ca-Sb minerals.


It originated from hydrothermal fluids related to Alpine metamorphism of greenschist facies.


Classification of OxycalcioroméiteHide

Approved
Approval Year:
2012

Physical Properties of OxycalcioroméiteHide

Vitreous, Resinous
Transparency:
Transparent
Colour:
Reddish-brown
Streak:
Pale yellow
Tenacity:
Brittle
Fracture:
Irregular/Uneven
Density:
5.393 g/cm3 (Calculated)

Optical Data of OxycalcioroméiteHide

Type:
Isotropic
RI values:
n = 1.950
Birefringence:
Isotropic minerals have no birefringence
Surface Relief:
Very High

Chemical Properties of OxycalcioroméiteHide

Formula:
Ca2Sb2O6O
Common Impurities:
Fe(II),Sb(III),Na,F,Ti,V

Crystallography of OxycalcioroméiteHide

Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Fd3m
Cell Parameters:
a = 10.3042(7) Å
Unit Cell V:
1094.06 ų
Z:
8

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.93Å(32)
3.105Å(24)
2.977Å(100)
2.576Å(24)
1.984Å(8)
1.824Å(45)
1.556Å(34)
1.489Å(8)

Type Occurrence of OxycalcioroméiteHide

General Appearance of Type Material:
euhedral octahedra, up to 0.1 mm
Place of Conservation of Type Material:
The Museo di Storia Naturale e del Territorio, Università di Pisa, Calci (Pisa), Italy, catalogue number 19640.
Geological Setting of Type Material:
dolostone lenses within the barite-pyrite-magnetite-hematite ore body, at the contact between metavolcanic-metasedimentary Triassic schists, dolostone, and Lower Jurassic marbles.
Associated Minerals at Type Locality:

Synonyms of OxycalcioroméiteHide

Other Language Names for OxycalcioroméiteHide

Relationship of Oxycalcioroméite to other SpeciesHide

Other Members of this group:
CuproroméiteCu2Sb2(O,OH)7Iso.
Fluorcalcioroméite(Ca,Na,◻)2Sb5+2(O,OH)6FIso. m3m (4/m 3 2/m) : Fd3m
Hydroxycalcioroméite(Ca,Sb3+)2(Sb5+,Ti)2O6(OH)Iso. m3m (4/m 3 2/m) : Fd3m
Hydroxyferroroméite(Fe2+1.50.5)Sb5+2O6(OH)Iso. m3m (4/m 3 2/m) : Fd3m
OxyplumboroméitePb2Sb2O6OIso. m3m (4/m 3 2/m) : Fd3m

Fluorescence of OxycalcioroméiteHide

Other InformationHide

IR Spectrum:
Sb-O vibrations at 873 cm-1; no bands from OH (stretching or bending)
Notes:
Raman bands [cm-1]: 199 (lattice vibrations); 295 (O-Sb-O bending); 509, 666, and 777 (Sb-O stretching); no bands from OH (stretching or bending)
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 OxycalcioroméiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Christy, A.G. and Gatedal, K. (2005) Extremely Pb-rich rock-forming silicates including a beryllian scapolite and associated minerals in a skarn from Långban, Värmland, Sweden. Mineralogical Magazine: 69: 995-1018 [as roméite].
Biagioni, C. and Orlandi, P. (2012) Oxycalcioroméite, IMA 2012-022. CNMNC Newsletter No. 14, October 2012, page 1283; Mineralogical Magazine: 76: 1281-1288.
Biagioni, C., Orlandi, P., Nestola, F., and Bianchin, S. (2013) Oxycalcioroméite, Ca2Sb2O6O, from Buca della Vena mine, Apuan Alps, Tuscany, Italy: a new member of the pyrochlore supergroup. Mineralogical Magazine: 77: 3027-3037.
Christy, A.G. and Atencio, D. (2013) Clarification of status of species in the pyrochlore supergroup. Mineralogical Magazine: 77: 13-20.
Belakovskiy, D.I., Cámara, F., Gagne, O.C., and Uvarova, Y. (2015) New mineral names. American Mineralogist: 100: 2352-2362.

Internet Links for OxycalcioroméiteHide

Localities for OxycalcioroméiteHide

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.
Austria
 
  • Lower Austria
    • Krems-Land District
      • Spitz
        • Miesling valley
Kolitsch, U. (2017): 2039) Allanit-(Ce), Cerianit-(Ce), Cheralith, Chernovit-(Y), Mineralien der Pyrochlorsupergruppe, Columbit-(Fe), Columbit-(Mn), Uraninit und weitere Mineralien aus einem Pegmatit im Blocherleitengraben im Mieslingtal bei Spitz, Waldviertel, Niederösterreich. Pp. 256-259 in Walter, F. et al. (2017): Neue Mineralfunde aus Österreich LXVI. Carinthia II, 207./127., 217-284.
Italy (TL)
 
  • Tuscany
    • Lucca Province
      • Stazzema
        • Ponte Stazzemese
Biagioni, C. and Orlandi, P. (2012): Oxycalcioroméite, IMA 2012-022. CNMNC Newsletter No. 14, October 2012, page 1283; Mineralogical Magazine, 76, 1281-1288; Biagioni, C., Orlandi, P., Nestola, F., Bianchin, S. (2013): Oxycalcioroméite, Ca2Sb2O6O, from Buca della Vena mine, Apuan Alps, Tuscany, Italy: a new member of the pyrochlore supergroup. Mineralogical Magazine, 77, 3027-3037.
Portugal
 
  • Beja
    • Beja
      • Nossa Senhora das Neves
Pedro Alves collection
Sweden
 
  • Värmland County
    • Filipstad
Christy, A.G. & Gatedal, K. (2005): Extremely Pb-rich rock-forming silicates including a beryllian scapolite and associated minerals in a skarn from Långban, Värmland, Sweden. Mineralogical Magazine: 69: 995-1018; Atencio, D., Andrade, M.B., Christy, A.G., Gieré, R., Kartashov, P.M. (2010) The pyrochlore supergroup of minerals: nomenclature. The Canadian Mineralogist: 48: 673-698.
Switzerland
 
  • Grisons
    • Hinterrhein
      • Ferrera Valley
        • Ausserferrera
Roth, P. & Meisser, N. (2013): Die seltenen Mineralien der Bündner Manganvorkommen. Schweizer Strahler 47 (3), 8-21 (in German and French).
 
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