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Lapeyreite Mineral Data
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General Lapeyreite Information
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Chemical Formula: |
Cu3O[AsO3(OH)]2•H2O |
Composition: |
Molecular Weight = 504.51 gm |
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Copper 37.79 % Cu 47.30 % CuO |
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Arsenic 29.70 % As 45.56 % As2O5 |
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Hydrogen 0.80 % H 7.14 % H2O |
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Oxygen 31.71 % O |
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______ ______ |
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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, D�me 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 |
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Lapeyreite Crystallography
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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 - Prismatic H-M Symbol (2/m) Space Group: C 2/m |
X Ray Diffraction: |
By Intensity(I/Io): 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), |
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Optical Properties of Lapeyreite
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Optical Data: |
NCalc= 1.59 - from Gladstone-Dale relationship (KC = 0.1785) where Ncalc=Dcalc*KC+1 |
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Calculated Properties of Lapeyreite
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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: |
PELapeyreite = 37.42 barns/electron U=PELapeyreite x rElectron Density= 117.07 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Lapeyreite is Not Radioactive |
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Lapeyreite Classification
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Dana Class: |
41.03.01.03 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen |
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(41.03)where (A B)3 (XO4) Zq |
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(41.03.01)Clinoclase Group |
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41.03.01.01 Clinoclase Cu3(AsO4)(OH)3 P 21/a 2/m |
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41.03.01.02 Gilmarite! Cu3(AsO4)(OH)3 P1 1 |
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41.03.01.03 Lapeyreite! Cu3O[AsO3(OH)]2•H2O C 2/m 2/m |
Strunz Class: |
08.XX.00 08 - PHOSPHATES, ARSENATES, VANADATES |
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08.X - Unclassified Strunz PHOSPHATES, ARSENATES, VANADATES |
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08.XX -Arsenites, Basic |
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08.XX.00 Arsenobismite? Bi2(AsO4)(OH)3 Unk Ortho |
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08.XX.00 Coeruleolactite (Ca,Cu)Al6(PO4)4(OH)8•4-5(H2O) P1 1 |
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08.XX.00 Cheralite-(Ce)? (Ce,Ca,Th)(P,Si)O4 P 21/n 2/m |
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08.XX.00 Chernovite-(Ce)* (Ce,Y)(AsO4) I 41/amd 4/m 2/m 2/m |
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08.XX.00 Kerstenite? PbSeO4(?) P nma 2/m 2/m 2/m |
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08.XX.00 Laubmannite? Fe3Fe6(PO4)4(OH)12 Unk Ortho |
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08.XX.00 Spodiosite? Ca2(PO4)F Pbcm 2/m 2/m 2/m |
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08.XX.00 Pseudo-autunite* (H3O)4Ca2(UO2)2(PO4)4•5(H2O)(?) Unk Ortho |
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08.XX.00 Viseite Ca10Al24(SiO4)6(PO4)7O22F3•72(H2O)(?) I a3d 4/m 3 2/m |
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08.XX.00 Vanuranylite? (H3O,Ba,Ca,K)1.6(UO2)2V2O8•4(H2O)(?) C 2/c ? 2/m |
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08.XX.00 Sodium-autunite Na2(UO2)2(PO4)2•8(H2O) P 4/nmm 4/m 2/m 2/m |
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08.XX.00 Sodium meta-autunite! Na2(UO2)2(PO4)2•6-8(H2O) P 4/nmm 4/m 2/m 2/m |
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08.XX.00 Slavkovite! Cu13(AsO4)6(AsO3OH)4•23(H2O) P1 1 |
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08.XX.00 IMA2000-020! Fe4[AsO3OH]5[AsO2(OH)2]2•20(H2O) Ortho Ortho |
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08.XX.00 Lewisite! (Ca,Fe,Na)2(Sb,Ti)2O7 F d3m 4/m 3 2/m |
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08.XX.00 Kamarizaite! Fe3(AsO4)2(OH)3•3H2O Pccm, Pcc2, Pcmm, Pcm21 Ortho |
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08.XX.00 Lapeyreite! Cu3O[AsO3(OH)]2•H2O C 2/m 2/m |
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08.XX.00 IMA2008-063 Pb[Zn0.25,[]0.75]Fe3H(AsO4)2(OH)6 C 2/c 2/m |
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08.XX.00 IMA2009-002! Cu3(AsO4)2 P 21/c 2/m |
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08.XX.00 IMA2009-005 (Y,Ca,REE)5[(Si,P)O4]3F P 63/m 6/m 2/m 2/m |
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08.XX.00 IMA2009-016 Cu4H(AsO4)2(OH)3•H2O P1 1 |
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Other Lapeyreite Information
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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
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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:
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