Lapeyreite Mineral Data

[Minerals for Sale] [New Minerals] [Diamond Crystals] [Gem Minerals] [My Best Minerals]
Classic minerals, out-of-print books & magazines, plus informative articles for collectors

General Lapeyreite Information

Chemical Formula:

Cu3O[AsO3(OH)]2•H2O

Composition:

Molecular Weight = 504.51 gm

Copper 37.79 % Cu 47.30 % CuO

Arsenic 29.70 % As 45.56 % As₂O₅

Hydrogen 0.80 % H 7.14 % H₂O

Oxygen 31.71 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Cu₃O(AsO₃OH)₂•(H₂O)

Environment:

Related to theoparacelsite

IMA Status:

Proposed IMA 2008 (Dana # Added)

Locality:

Roua, Dôme de Barrot, Departement Alpes-Maritimes, France Link to MinDat.org Location Data.

Name Origin:

Commission on New Minerals, Nomenclature and Classification (CNMNC)

Synonym:

IMA2003-023b

Search for Lapeyreite Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Lapeyreite Crystallography

Axial Ratios:

a:b:c =6.5249:1:3.131

Cell Dimensions:

a = 19.158, b = 2.9361, c = 9.193, Z = 2; beta = 103.26° V = 503.32 Den(Calc)= 3.33

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.984(1), 3.173(0.9), 2.484(0.8),2.396(0.4), 5.842(0.4), 2.337(0.35), 4.476(0.35), 7.36(0.3),

Optical Properties of Lapeyreite

Optical Data:

NCalc= 1.59 - from Gladstone-Dale relationship (KC = 0.1785) where Ncalc=Dcalc*KC+1

Calculated Properties of Lapeyreite

Electron Density:

Bulk Density (Electron Density)=3.13 gm/cc
note: Specific Gravity of Lapeyreite =3.33 gm/cc.

Fermion Index:

Fermion Index = 0.0001534208
Boson Index = 0.9998465792

Photoelectric:

PE_Lapeyreite= 37.42 barns/electron
U=PE_Lapeyreite x rElectron Density= 117.07 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lapeyreite is Not Radioactive

Lapeyreite Classification

Dana Class:

41.03.01.03 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen

(41.03)where (A B)3 (XO4) Zq

(41.03.01)Clinoclase Group

41.03.01.01 Clinoclase Cu3(AsO4)(OH)3 P 2₁/a 2/m

41.03.01.02 Gilmarite! Cu3(AsO4)(OH)3 P1 1

41.03.01.03 Lapeyreite! Cu3O[AsO3(OH)]2•H2O C 2/m 2/m

Strunz Class:

08.XX.00 08 - PHOSPHATES, ARSENATES, VANADATES

08.X - Unclassified Strunz PHOSPHATES, ARSENATES, VANADATES

08.XX -Arsenites, Basic

08.XX.00 Arsenobismite? Bi2(AsO4)(OH)3 Unk Ortho

08.XX.00 Coeruleolactite (Ca,Cu)Al6(PO4)4(OH)8•4-5(H2O) P1 1

08.XX.00 Cheralite-(Ce)? (Ce,Ca,Th)(P,Si)O4 P 2₁/n 2/m

08.XX.00 Chernovite-(Ce)* (Ce,Y)(AsO4) I 4₁/amd 4/m 2/m 2/m

08.XX.00 Kerstenite? PbSeO4(?) P nma 2/m 2/m 2/m

08.XX.00 Laubmannite? Fe3Fe6(PO4)4(OH)12 Unk Ortho

08.XX.00 Spodiosite? Ca2(PO4)F Pbcm 2/m 2/m 2/m

08.XX.00 Pseudo-autunite* (H3O)4Ca2(UO2)2(PO4)4•5(H2O)(?) Unk Ortho

08.XX.00 Viseite Ca10Al24(SiO4)6(PO4)7O22F3•72(H2O)(?) I a3d 4/m 3 2/m

08.XX.00 Vanuranylite? (H3O,Ba,Ca,K)1.6(UO2)2V2O8•4(H2O)(?) C 2/c ? 2/m

08.XX.00 Sodium-autunite Na2(UO2)2(PO4)2•8(H2O) P 4/nmm 4/m 2/m 2/m

08.XX.00 Sodium meta-autunite! Na2(UO2)2(PO4)2•6-8(H2O) P 4/nmm 4/m 2/m 2/m

08.XX.00 Slavkovite! Cu13(AsO4)6(AsO3OH)4•23(H2O) P1 1

08.XX.00 IMA2000-020! Fe4[AsO3OH]5[AsO2(OH)2]2•20(H2O) Ortho Ortho

08.XX.00 Lewisite! (Ca,Fe,Na)2(Sb,Ti)2O7 F d3m 4/m 3 2/m

08.XX.00 Kamarizaite! Fe3(AsO4)2(OH)3•3H2O Pccm, Pcc2, Pcmm, Pcm21 Ortho

08.XX.00 Lapeyreite! Cu3O[AsO3(OH)]2•H2O C 2/m 2/m

08.XX.00 IMA2008-063 Pb[Zn0.25,[]0.75]Fe3H(AsO4)2(OH)6 C 2/c 2/m

08.XX.00 IMA2009-002! Cu3(AsO4)2 P 2₁/c 2/m

08.XX.00 IMA2009-005 (Y,Ca,REE)5[(Si,P)O4]3F P 6₃/m 6/m 2/m 2/m

08.XX.00 IMA2009-016 Cu4H(AsO4)2(OH)3•H2O P1 1

Other Lapeyreite Information

See Also:

Links to other databases for Lapeyreite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

Search for Lapeyreite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Lapeyreite :

A Bijoux Google Search for Lapeyreite
Adam's Minerals Google Search for Lapeyreite
Cape Minerals Google Search for Lapeyreite
Dakota Matrix Minerals Google Search for Lapeyreite
Excalibur Mineral Corp. Google Search for Lapeyreite
Exceptional Minerals Google Search for Lapeyreite
John Betts Fine Minerals Search for Lapeyreite
McDougall Minerals Google Search for Lapeyreite
Mineral News Website Link
Rock and Mineral Shows Google Search for Lapeyreite
Weinrich Minerals, Inc. Google Search for Lapeyreite

Ask about Lapeyreite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Lapeyreite Specimen Label here :

Lapeyreite

Cu3O[AsO3(OH)]2•H2O
Dana No: 41.03.01.03 Strunz No: 08.XX.00
Locality:

Notes: