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Hydroxycalcioroméite

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Formula:
(Ca,Sb
3+
 
)
 
2
(Sb
5+
 
,Ti)
 
2
O
 
6
(OH)
System:IsometricColour:Amber yellow, golden ...
Hardness:
Member of:Roméite Group > Pyrochlore Supergroup
Name:Originally named lewisite in 1895 by Eugen Hussak and George Thurland Prior in honor of William James Lewis [January 10, 1847 Llanwyddelan, Montgomeryshire, Wales, United Kingdom - April 16, 1926 Godalming, Surry, England, United Kingdom], morphological crystallographer and Professor of Mineralogy, Cambridge University, Cambridge, England, UK. Renamed in 2007 in anticipation of systematic names replacing trivial names.


Found as yellow to brown octahedral crystals to 1 mm and as earthy masses

Classification of Hydroxycalcioroméite

IMA status:Approved 1895
mindat.org URL:http://www.mindat.org/min-2389.html
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Occurrences of Hydroxycalcioroméite

Geological Setting:Sulfosalt veins

Physical Properties of Hydroxycalcioroméite

Lustre:Sub-Vitreous, Resinous, Earthy
Diaphaneity (Transparency):Transparent, Translucent
Colour:Amber yellow, golden yellow, yellow brown
Streak:Pale yelow brown
Hardness (Mohs):
Hardness Data:Measured
Tenacity:Brittle
Cleavage:Perfect
{111}
Fracture:Sub-Conchoidal
Density (measured):4.95 g/cm3
Density (calculated):5.31 g/cm3

Crystallography of Hydroxycalcioroméite

Crystal System:Isometric
Class (H-M):m3m (4/m 3 2/m) - Hexoctahedral
Space Group:Fd3m
Cell Parameters:a = 10.264Å
Unit Cell Volume:V 1,081.31 ų (Calculated from Unit Cell)
Morphology:Octahedral
Comment:ICDD 7-66
X-Ray Powder Diffraction:
d-spacingIntensity
2.94 (100)
1.813 (100)
1.548 (100)
1.179 (50)
1.150 (50)
1.050 (50)
0.989 (50)
Comments:ICDD 7-66

Optical Data of Hydroxycalcioroméite

Type:Isotropic
Pleochroism:Non-pleochroic

Chemical Properties of Hydroxycalcioroméite

Formula:
(Ca,Sb
3+
 
)
 
2
(Sb
5+
 
,Ti)
 
2
O
 
6
(OH)
Simplified for copy/paste:(Ca,Sb3+)2(Sb5+,Ti)2O6(OH)
Essential elements:Ca, H, O, Sb
All elements listed in formula:Ca, H, O, Sb, Ti

Relationship of Hydroxycalcioroméite to other Species

Member of:Roméite Group > Pyrochlore Supergroup
Other Members of Group:

- +
Cuproroméite
Cu
 
2
Sb
 
2
(O,OH)
 
7
Fluorcalcioroméite
(Ca,Na)
 
2
Sb
5+
 
 
2
O
 
6
(F,OH)
Fluornatroroméite
(Na,Ca)
 
2
Sb
 
2
(O,OH)
 
6
F
Oxycalcioroméite
Ca
 
2
Sb
 
2
O
 
7
Oxyplumboroméite
Pb
 
2
Sb
 
2
O
 
7
Common Associates:
QuartzTetrahedrite

Other Names for Hydroxycalcioroméite

Synonyms:
Lewisite
Other Languages:
German:Hydroxycalcioroméit
Lewisit
Russian:Льюисит
Simplified Chinese:钛锑钙石
锑钛钙矿
钛锑铁钙石
Spanish:Lewisita

Other Information

Fluorescence in UV light:Not fluorescent in UV
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Hydroxycalcioroméite

Reference List:

- +
Hussak and Prior (1895) Mineralogical Magazine: 11: 80.

Zeitschrift für Kristallographie (1932): 82: 72.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 1020-1022.

Journal of Solid State Chemistry: (1998): 141: 562-569.

Mineralogical Magazine (2003): 67: 31.

American Mineralogist (1998): 83: 403.

American Mineralogist (1999): 84: 1198.

draft pyrochlore report.

Burke, Ernest A.J. (2007) A Mass Discreditation of GQN Minerals. Canadian Mineralogist: 44(6): 1557-1560.

Internet Links for Hydroxycalcioroméite

Search Engines:
  • Look for Hydroxycalcioroméite on Google
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  • External Links:
  • Look for Hydroxycalcioroméite on Webmineral
  • Look for Hydroxycalcioroméite on Athena Mineralogy
  • Look for Hydroxycalcioroméite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Lewisite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
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  • Localities for Hydroxycalcioroméite

    The 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.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Austria
     
    • Lower Austria
      • Waldviertel
        • Geras
          • Kottaun
    Kolitsch, U. (2014): 1883) Bismutit, Fluorapatit, Fluorit, Galenit, Hydroxycalcioroméit(?), Kettnerit, Oxyplumboroméit, Pyromorphit, Tetraedrit, gediegen Wismut(?) und Wittichenit aus dem neuen, kleinen Steinbruch („Andradit-Bruch“) nördlich Kottaun, Geras, Waldviertel, Niederösterreich Pp. 117-119 in Niedermayr, G. et al. (2014): Neue Mineralfunde aus Österreich LXIII. Carinthia II, 204./124., 65-146.
    Brazil
     
    • Minas Gerais
      • Iron Quadrangle
        • Ouro Preto
          • Main district
    Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 1022; Contributions to Mineralogy and Petrology (1997): 127: 136; American Mineralogist (1998): 83: 403; American Mineralogist (1999): 84: 1198.; Hussak and Prior (1900) Mineralogical Magazine: 12: 244.
    Canada
     
    • Ontario
      • Thunder Bay District
        • Bomby Township
    Harris (1989)
    China
     
    • Guangxi Zhuang Autonomous Region
      • Hechi Prefecture
        • Jinchengjiang District
          • Beixiang - Furongchang ore field
    Liangming Fan, Rubo Zhang, and Xingzhen Wang (1983): Geological Review 48(6), 575-577
    New Zealand
     
    • South Island
      • Hindon
    Museum Victoria Registration Number: M 48638
    Sweden
     
    • Värmland
      • Filipstad
    Pavel M. Kartashov analytical data (2010) Ulf Nyberg specimens
    USA
     
    • Arizona
      • Cochise Co.
        • Dragoon Mts
          • Johnny Lyon Hills
            • Tres Alamos Wash
    Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 136, 276, 323.
    • Utah
      • Tooele Co.
        • Sheeprock Mts
          • Little Valley
    Norman King
      • Utah Co.
        • Oquirrh Mts
          • Fairfield
            • Clay Canyon
    Rocks & Minerals (1970): 45(11): 667-674.; Wendell Wilson (2010) The Clay Canyon Variscite Mine, Fairfield Utah. Mineralogical Record 41:321-349
    Vietnam
     
    • Hà Giang Province
    Shunso Ishihara and Pham Tich Xuan (2013)Distribution of some ore metals around the Mau Due stibnite deposits, northernmost Vietnam. Bulletin of the Geological Survey of Japan 64:51-57.
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    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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