Reppiaite Mineral Data

Reppiaite Mineral Data
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General Reppiaite Information

Help on Chemical Formula: Chemical Formula: Mn++5[(V,As)O4]2(OH)4
Help on Composition: Composition: Molecular Weight = 577.39 gm
   Manganese  47.57 %  Mn   61.43 % MnO
   Vanadium   15.88 %  V    28.35 % V2O5
   Arsenic     2.60 %  As    3.98 % As2O5
   Hydrogen    0.70 %  H     6.24 % H2O
   Oxygen     33.25 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+5(VO4)1.8(AsO4)0.2(OH)4
Help on Environment: Environment: Manganese chert ores.
Help on IMA Status: IMA Status: Approved IMA 1992
Help on Locality: Locality: Gambatesa mine, near Reppia, Val Graveglia, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Reppiaite + Pronunciation Say REPPIAITE
Help on Synonym: Synonym: ICSD 36586
  IMA1991-007
  PDF 47-1831
 

Reppiaite Image

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Reppiaite

Comments: Vitreous orange crystals of reppiaite embedded in matrix.
Location: Gambatesa mine, Genova, Ligurai, Italy. Scale: Crystal size 0.5mm.
© Tom Loomis / Dakota Matrix

Reppiaite Crystallography
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.68(1), 4.76(0.81), 2.656(0.5),
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Barbier J , European Journal of Mineralogy , 8 (1996) p.77-84, Crystal structure of Ni5(AsO4)2(OH)4 and its comparison to other, M5(XO4)2(OH)4 compounds

 

Physical Properties of Reppiaite

Help on Color: Color: Orange red.
 

Optical Properties of Reppiaite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.16 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.16 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2057,KPDmeas= 0.2057,KC= 0.2451
Ncalc = 1.96
 

Calculated Properties of Reppiaite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.71 gm/cc
note: Specific Gravity of Reppiaite =3.92 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0005576749
Boson Index = 0.9994423251
Help on Photoelectric: Photoelectric: PEReppiaite = 17.29 barns/electron
U=PEReppiaite x rElectron Density= 64.10 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Reppiaite is Not Radioactive
 

Reppiaite Classification
Help on Dana Class: Dana Class: 41.04.08.01 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.04)where (A B)5 (XO4)2 Zq
  (41.04.08)Dana Group
 
41.04.08.01 Reppiaite Mn5[(V,As)O4]2(OH)4 C 2/m 2/m
Help on Strunz Class: Strunz Class: 08.BD.20 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BD -With only medium-sized cations, (OH, etc.):RO4 = 2:1
 
08.BD.20 Reppiaite Mn5[(V,As)O4]2(OH)4 C 2/m 2/m
 

Other Reppiaite Information
Help on See Also: See Also: Links to other databases for Reppiaite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Ask about Reppiaite here :
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Print or Cut-and-Paste your Reppiaite Specimen Label here :

Reppiaite

Mn++5[(V,As)O4]2(OH)4
Dana No: 41.04.08.01 Strunz No: 08.BD.20
Locality:

 

Notes: