Reppiaite Mineral Data

Reppiaite Mineral Data
Search Webmineral :
   
Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images       News Help About



[Newest Minerals] [Equipment] [Analytical Services] [About Us] [Mineral Gallery] [eBay Store]
See Also: [Diamond Crystals] [Mineral News] [Hudson Institute] [Minerals on CDROM]
Rare Minerals, Meteorites, Equipment and Analytical Services
Excalibur Mineral Company, World leaders in the supply of rare species
Serving the scientific and collector communities since 1974


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

Click Here for Larger Reppiaite Image in a New Browser Window Images:
Click Here for Larger Reppiaite Image

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),
Click Here for Large Reppiaite Structure Window Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
 Help on Above


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 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info

Search for Reppiaite using:

Google
 
Web webmineral.com
[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Reppiaite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

Excalibur Minerals

Exceptional Minerals

Fabre Minerals

Heliodor

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Reppiaite Mineral Data :

Ask about Reppiaite 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 Espaņol

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: