Arsenoclasite Mineral Data

Arsenoclasite Mineral Data
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General Arsenoclasite Information

Help on Chemical Formula: Chemical Formula: Mn5(AsO4)2(OH)4
Help on Composition: Composition: Molecular Weight = 620.56 gm
   Manganese  44.27 %  Mn   57.16 % MnO
   Arsenic    24.15 %  As   37.04 % As2O5
   Hydrogen    0.65 %  H     5.81 % H2O
   Oxygen     30.94 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+5(AsO4)2(OH)4
Help on Environment: Environment: A rare fissure mineral in a metamorphosed Fe-Mn orebody (Langban, Sweden); in a sedimentary Fe-Mn deposit (Iron Monarch quarry, Australia).
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1931
Help on Locality: Locality: At Langban, Varmland, Sweden. Crystallized from the Iron Monarch quarry, Iron Knob, South Australia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named from "arsenic" and the Greek for "breaking," for its excellent cleavage.
Help on Name Pronunciation: Name Pronunciation: Arsenoclasite + Pronunciation Say ARSENOCLASITE
Help on Synonym: Synonym: ICSD 15210
  PDF 20-704
 

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Arsenoclasite Crystallography
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.933(1), 2.739(0.75), 4.55(0.7),
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Moore P B , Molin-Case J , American Mineralogist , 56 (1971) p.1539-1552, Crystal chemistry of the basic manganese arsenates: V. Mixed manganese, coordination in the atomic arrangement of arsenoclasite

 

Physical Properties of Arsenoclasite

Help on Color: Color: Orange brown, Red.
 

Optical Properties of Arsenoclasite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.005 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.022 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1967,KPDmeas= 0.1933,KC= 0.1923
Ncalc = 1.79 - 1.8
 

Calculated Properties of Arsenoclasite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.90 gm/cc
note: Specific Gravity of Arsenoclasite =4.16 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0001494805
Boson Index = 0.9998505195
Help on Photoelectric: Photoelectric: PEArsenoclasite = 28.33 barns/electron
U=PEArsenoclasite x rElectron Density= 110.52 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Arsenoclasite is Not Radioactive
 

Arsenoclasite Classification
Help on Dana Class: Dana Class: 41.04.01.01 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.04)where (A B)5 (XO4)2 Zq
  (41.04.01)Dana Group
 
41.04.01.01 Arsenoclasite Mn5(AsO4)2(OH)4 P 212121 2 2 2
 
41.04.01.02 Gatehouseite Mn5(PO4)2(OH)4 P 212121 2 2 2
Help on Strunz Class: Strunz Class: 08.BD.10 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.10 Arsenoclasite Mn5(AsO4)2(OH)4 P 212121 2 2 2
 
08.BD.10 Gatehouseite Mn5(PO4)2(OH)4 P 212121 2 2 2
 

Other Arsenoclasite Information
Help on See Also: See Also: Links to other databases for Arsenoclasite :
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
15 - WWW-MINCRYST

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Arsenoclasite

Mn5(AsO4)2(OH)4
Dana No: 41.04.01.01 Strunz No: 08.BD.10
Locality:

 

Notes: