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Parabrandtite Mineral Data

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General Parabrandtite Information

Help on Chemical  Formula: Chemical Formula: Ca2Mn++(AsO4)•2(H2O)
Help on Composition: Composition: Molecular Weight = 448.96 gm
   Calcium    17.85 %  Ca   24.98 % CaO
   Manganese  12.24 %  Mn   15.80 % MnO
   Arsenic    33.38 %  As   51.19 % As2O5
   Hydrogen    0.90 %  H     8.03 % H2O
   Oxygen     35.64 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2Mn2+(AsO4)2•2(H2O)
Help on Environment: Environment: Found in a cavity in primary ore at Sterling.
Help on IMA Status: IMA Status: Approved IMA 1987
Help on Locality: Locality: Sterling Hill mine, Susex County, New Jersey, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its dimorphic relationship to brandtite.
Help on Name Pronunciation: Name Pronunciation: Parabrandtite + Pronunciation Say PARABRANDTITE
 

Parabrandtite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8377:1:0.8021
Help on Cell Dimensions: Cell Dimensions: a = 5.89, b = 7.031, c = 5.64, Z = 1; alpha = 96.77°, beta = 109.32°, gamma = 108.47° V = 207.60 Den(Calc)= 3.59
Help on Crystal System: Crystal System: Triclinic Space Group: P1,P 1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.811(1), 3.09(0.8), 3.61(0.7),
 

Physical Properties of Parabrandtite

Help on Cleavage: Cleavage: {010} Perfect, {110} Perfect
Help on Color: Color: Colorless.
Help on Density: Density: 3.55
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Hardness: Hardness: 3-4 - Calcite-Fluorite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Parabrandtite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.053 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.016 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1968,KPDmeas= 0.204,KC= 0.1938
Ncalc = 1.69 - 1.71
Help on Optical Data: Optical Data: Biaxial (+), a=1.701, b=1.721, g=1.751, bire=0.0500, 2V(Calc)=80, 2V(Meas)=79.9. Dispersion r > v weak.
 

Calculated Properties of Parabrandtite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.52 gm/cc
note: Specific Gravity of Parabrandtite =3.68 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0004134249
Boson Index = 0.9995865751
Help on Photoelectric: Photoelectric: PEParabrandtite = 28.02 barns/electron
U=PEParabrandtite x rElectron Density= 98.76 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Parabrandtite is Not Radioactive
 

Parabrandtite Classification

Help on  Dana Class: Dana Class: 40.02.02.08 (40)Hydrated Phosphates, etc
  (40.02)where A++ (B++)2 (XO4) � x(H2O)
  (40.02.02)Fairfieldite Subgroup (Triclinic: P-1�)
 
40.02.02.01 Fairfieldite Ca2(Mn,Fe)(PO4)2•2(H2O) P1 1
 
40.02.02.02 Messelite Ca2(Fe,Mn)(PO4)2•2(H2O) P1 1
 
40.02.02.03 Collinsite Ca2(Mg,Fe)(PO4)2•2(H2O) P1 1
 
40.02.02.04 Cassidyite Ca2(Ni,Mg)(PO4)2•2(H2O) P1 1
 
40.02.02.05 Talmessite Ca2Mg(AsO4)2•2(H2O) P1 1
 
40.02.02.06 Gaitite Ca2Zn(AsO4)2•2(H2O) P1 1
 
40.02.02.07 Roselite-beta Ca2(Co,Mg)(AsO4)2•2(H2O) P 1 or P1 Tri
 
40.02.02.08 Parabrandtite Ca2Mn(AsO4)•2(H2O) P1,P 1 Tri
 
40.02.02.09 Hillite! Ca2(Zn,Mg)[PO4]2•2(H2O) P1 1
 
40.02.02.10 Nickeltalmessite! Ca2Ni(AsO4)2•2H2O P 1
Help on  Strunz Class: Strunz Class: 08.CG.05 08 - PHOSPHATES, ARSENATES, VANADATES
  08.C - Phosphates without Additional Anions, with H2O
  08.CG -With large and medium-sized cations, RO4:H2O = 1:1
 
08.CG.05 Collinsite Ca2(Mg,Fe)(PO4)2•2(H2O) P1 1
 
08.CG.05 Gaitite Ca2Zn(AsO4)2•2(H2O) P1 1
 
08.CG.05 Cassidyite Ca2(Ni,Mg)(PO4)2•2(H2O) P1 1
 
08.CG.05 Fairfieldite Ca2(Mn,Fe)(PO4)2•2(H2O) P1 1
 
08.CG.05 Messelite Ca2(Fe,Mn)(PO4)2•2(H2O) P1 1
 
08.CG.05 Parabrandtite Ca2Mn(AsO4)•2(H2O) P1,P 1 Tri
 
08.CG.05 Uranophane-beta Ca[(UO2)SiO3(OH)]2•(H2O) P 21/a 2/m
 
08.CG.05 Talmessite Ca2Mg(AsO4)2•2(H2O) P1 1
 
08.CG.05 Hillite! Ca2(Zn,Mg)[PO4]2•2(H2O) P1 1
 

Other Parabrandtite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Am.Min.,Vol.73,p1496,1988)
Help on See Also: See Also: Links to other databases for Parabrandtite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

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

Parabrandtite

Ca2Mn++(AsO4)•2(H2O)
Dana No: 40.02.02.08 Strunz No: 08.CG.05
Locality:

 

Notes:

 

 
   
 


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