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Lewisite

Formula:
(Ca,Fe,Na)
 
2
(Sb,Ti)
 
2
(O,OH)
 
7
Name:After W.J. Lewis (1847-1926), former Professor of Mineralogy, Cambridge University, Cambridge, England, UK.
A variety of Roméite

Stibiconite Group.

A titanian variety of Roméite.
Originally reported from Tripuhy (Fazenda Tres Cruzes; Tripui), Ouro Preto, Minas Gerais, Southeast Region, Brazil.

Classification of Lewisite

Strunz 8th edition ID:4/C.11-30

4 : Oxides & Hydroxides
C : Oxides with metal : oxygen = 2:3 (M2O3 and related compounds)
11 : Stibiconite group, Partzite - Bindheimite series
Hey's CIM Ref.:24.3.1

24 : Antimonates and Antimonites
3 : Antimonates of Ti and Pb
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Chemical Properties of Lewisite

Formula:
(Ca,Fe,Na)
 
2
(Sb,Ti)
 
2
(O,OH)
 
7
Essential elements:Ca, O, Sb
All elements listed in formula:Ca, Fe, H, Na, O, Sb, Ti

Relationship of Lewisite to other Species

Related Minerals - Strunz Grouping):

- +
4/C.11-10Partzite
Cu
 
2
Sb
 
2
(O,OH)
 
7
4/C.11-20Stetefeldtite
Ag
 
2
Sb
 
2
(O,OH)
 
7
4/C.11-40Roméite
(Ca,Fe,Mn,Na)
 
2
(Sb,Ti)
 
2
O
 
6
(O,OH,F)
4/C.11-50Stibiconite
Sb
3+
 
Sb
5+
2
O
 
6
(OH)
4/C.11-60Bismutostibiconite
Bi(Sb
5+
 
,Fe
3+
 
)
 
2
O
 
7
4/C.11-70Bindheimite
Pb
 
2
Sb
 
2
O
 
6
(O,OH)
Related Minerals - Hey's Index Grouping:

- +
24.3.2Derbylite
(Fe,Fe,Ti)
 
7
SbO
 
13
(OH)
24.3.3Hemloite
(As,Sb)
 
2
(Ti,V,Fe,Al)
 
12
O
 
23
(OH)
24.3.4Nadorite
PbSb[O
 
2
|Cl]
24.3.5Bindheimite
Pb
 
2
Sb
 
2
O
 
6
(O,OH)
24.3.6Monimolite
(Pb,Ca,Fe)
 
3
Sb
 
2
O
 
7
24.3.7Thorikosite
Pb
 
3
[OH|(SbO
 
3
,AsO
 
3
)|Cl
 
2
]

Other Names for Lewisite

Other Languages:
German:Lewisit
Russian:Льюисит
Spanish:Lewisita

Other Information

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 Lewisite

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 Lewisite

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    Localities for Lewisite

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    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.
    Brazil
     
    • Southeast Region
      • Minas Gerais
        • Ouro Preto
    		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.
    New Zealand
     
    • South Island
      • Hindon
    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
      • Utah Co.
        • Oquirrh Mts
          • Fairfield
            • Clay Canyon
    		Rocks & Minerals (1970): 45(11): 667-674.
    Mineral and/or Locality
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