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Lapeyreite

Formula:
Cu
 
3
O[AsO
 
3
(OH)]
 
2
·0.75H
 
2
O
System:Monoclinic


Related to theoparacelsite.

Classification of Lapeyreite

IMA status:Approved 2008
mindat.org URL:http://www.mindat.org/min-38830.html
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Type Occurrence of Lapeyreite

Type Locality:Roua Mines (Clue de Roua), Daluis, Guillaumes, Alpes-Maritimes, Provence-Alpes-Côte d'Azur, France

Crystallography of Lapeyreite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:B2/m {B1 1 2/m} {C2/m} {C1 2/m 1}
Cell Parameters:a = 19.158Å, b = 2.9361Å, c = 9.193Å
β = 103.26°
Ratio:a:b:c = 6.525 : 1 : 3.131
Unit Cell Volume:V 503.32 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
7.36 (30)
5.842 (40)
4.476 (35)
3.173 (90)
2.984 (100)
2.484 (80)
2.396 (40)

Chemical Properties of Lapeyreite

Formula:
Cu
 
3
O[AsO
 
3
(OH)]
 
2
·0.75H
 
2
O
Idealised Formula:
Cu
 
3
O[AsO
 
3
(OH)]
 
2
·1H
 
2
O
Essential elements:As, Cu, H, O
All elements listed in formula:As, Cu, H, O

Other Names for Lapeyreite

Synonyms:
IMA2003-023b
Other Languages:

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 Lapeyreite

Reference List:Proposals approved in September 2008

Sarp, H., Cerny, R., Babalýk, H., Hatýpoðlu, M., Mari, G. (2009): Lapeyreite, Cu3O[AsO3(OH)]2.0·75H2O, a new mineral: its description and crystal structure. American Mineralogist, 94, (under review).

Sarp, H., Mari, G., Mari, D., Rolland, P., Lapeyre, L. (2000): Gilmarite, rollandite, théoparacelsite, radovanite, nouvelles espèces minérales de Roua (Daluis de Guillaumes, Alpes-Maritimes, France). Riviéra Scientifique, 84, 19-24. [preliminary data]

Internet Links for Lapeyreite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Lapeyreite in the Natural History Museum (London) online catalogue
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    Localities for Lapeyreite

    (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.
    France
     
    • Provence-Alpes-Côte d'Azur
      • Alpes-Maritimes
        • Guillaumes
          • Daluis
    		IMA website - Sept. 2008
    Mineral and/or Locality
    Google
     
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