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Whiteite-(CaFeMg) Mineral Data

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General Whiteite-(CaFeMg) Information

Help on Chemical  Formula: Chemical Formula: Ca(Fe++,Mn++)Mg2Al2(PO4)4(OH)2•8(H2O)
Help on Composition: Composition: Molecular Weight = 756.29 gm
   Calcium      5.30 %  Ca    7.41 % CaO
   Magnesium    6.43 %  Mg   10.66 % MgO
   Manganese    1.82 %  Mn    2.34 % MnO
   Aluminum     7.14 %  Al   13.48 % Al2O3
   Iron         5.54 %  Fe    7.12 % FeO
   Phosphorus  16.38 %  P    37.54 % P2O5
   Hydrogen     2.40 %  H    21.44 % H2O
   Oxygen      55.00 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaFe2+0.75Mn2+0.25Mg2Al2(PO4)4(OH)2�8(H2O)
Help on Environment: Environment: Found in pegmatites.
Help on IMA Status: IMA Status: Approved IMA 1978
Help on Locality: Locality: Ilha de Taquaral, Minas Gerias, Brazil. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for John S. White, Jr. (1933-), former editor of the Mineralogical Record and professional curator of minerals and gems.
Help on Name Pronunciation: Name Pronunciation: Whiteite-(CaFeMg) Say WHITEITE-(CAFEMG)
 

Whiteite-(CaFeMg) Image

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  Whiteite-(CaFeMg)

Comments: Blocky, beige-pink whiteite-(CaFeMg) crystals on matrix.
Location: Cross-cut Creek, Yukon Territory, Canada. Scale: Crystal size 2x3x3.5 cm.
© Dave Barthelmy

Whiteite-(CaFeMg) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.1346:1:1.4512
Help on Cell Dimensions: Cell Dimensions: a = 14.9, b = 6.98, c = 10.13, Z = 2; beta = 113.12° V = 968.92 Den(Calc)= 2.59
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 9.27(1), 2.781(0.8), 2.941(0.7),
 

Physical Properties of Whiteite-(CaFeMg)

Help on Cleavage: Cleavage: {???} Perfect
Help on Color: Color: Yellow, Yellow brown.
Help on Density: Density: 2.58
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Vitreous - Dull
Help on Streak: Streak: white
 

Optical Properties of Whiteite-(CaFeMg)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.01 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.007 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2259,KPDmeas= 0.2267,KC= 0.2244
Ncalc = 1.58
Help on Optical Data: Optical Data: Biaxial (+), a=1.58, b=1.585, g=1.59, bire=0.0100, 2V(Calc)=88, 2V(Meas)=40-50.
 

Calculated Properties of Whiteite-(CaFeMg)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.61 gm/cc
note: Specific Gravity of Whiteite-(CaFeMg) =2.59 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0079406591
Boson Index = 0.9920593409
Help on Photoelectric: Photoelectric: PEWhiteite-(CaFeMg) = 3.87 barns/electron
U=PEWhiteite-(CaFeMg) x rElectron Density= 10.12 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Whiteite-(CaFeMg) is Not Radioactive
 

Whiteite-(CaFeMg) Classification

Help on  Dana Class: Dana Class: 42.11.03.01 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.11)where (AB)4 (XO4)3 Zq � x(H2O)
  (42.11.03)Whiteite Group
 
42.11.03.01 Whiteite-(CaFeMg) Ca(Fe,Mn)Mg2Al2(PO4)4(OH)2•8(H2O) P 21/a 2/m
 
42.11.03.02 Whiteite-(MnFeMg) (Mn,Ca)(Fe,Mn)Mg2Al2(PO4)4(OH)2•8(H2O) P 2/a 2/m
 
42.11.03.03 Whiteite-(CaMnMg) CaMnMg2Al2(PO4)4(OH)2•8(H2O) P 2/a 2/m
 
42.11.03.04 Rittmannite MnMnFeAl2(OH)2(PO4)4•8(H2O) P 2/a 2/m
 
42.11.03.05 Jahnsite-(CaFeFe)! (Ca,Mn)(Fe,Mn)Fe2Fe2(PO4)4(OH)2•8(H2O) P 2/a 2/m
 
42.11.03.06 Jahnsite-(NaFeMg)! NaFeMg2Fe2(PO4)4(OH)2•8H2O P 2/a 2/m
 
42.11.03.07 Jahnsite-(CaMgMg)! CaMgMg2Fe2(PO4)4(OH)2•8H2O P 2/a 2/m
 
42.11.03.08 Jahnsite-(NaMnMg)! NaMnMg2Fe2(PO4)4(OH)2•8H2O P 2/a 2/m
Help on  Strunz Class: Strunz Class: 08.DH.15 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DH -With large and medium-sized cations, (OH, etc.):RO4 < 1:1
 
08.DH.15 Keckite Ca(Mn,Zn)2Fe3(PO4)4(OH)3•2(H2O) P 21/a 2/m
 
08.DH.15 Jahnsite-(CaMnFe) CaMnFe2Fe2(PO4)4(OH)2•8(H2O) P 2/a 2/m
 
08.DH.15 Jahnsite-(CaMnMg) CaMnMg2Fe2(PO4)4(OH)2•8(H2O) P 2/a 2/m
 
08.DH.15 Jahnsite-(CaMnMn) CaMnMn2Fe2(PO4)4(OH)2•8(H2O) P 2/a 2/m
 
08.DH.15 Jahnsite-(MnMnMn)* MnMnMn2Fe2(PO4)4(OH)2•8(H2O) P 2/a 2/m
 
08.DH.15 Kaluginite* (Mn,Ca)MgFe(PO4)2(OH)•4(H2O) C cca 2/m 2/m 2/m
 
08.DH.15 Rittmannite MnMnFeAl2(OH)2(PO4)4•8(H2O) P 2/a 2/m
 
08.DH.15 Whiteite-(MnFeMg) (Mn,Ca)(Fe,Mn)Mg2Al2(PO4)4(OH)2•8(H2O) P 2/a 2/m
 
08.DH.15 Whiteite-(CaFeMg) Ca(Fe,Mn)Mg2Al2(PO4)4(OH)2•8(H2O) P 21/a 2/m
 
08.DH.15 Whiteite-(CaMnMg) CaMnMg2Al2(PO4)4(OH)2•8(H2O) P 2/a 2/m
 
08.DH.15 Jahnsite-(CaFeFe)! (Ca,Mn)(Fe,Mn)Fe2Fe2(PO4)4(OH)2•8(H2O) P 2/a 2/m
 
08.DH.15 Jahnsite-(NaFeMg)! NaFeMg2Fe2(PO4)4(OH)2•8H2O P 2/a 2/m
 
08.DH.15 Jahnsite-(CaMgMg)! CaMgMg2Fe2(PO4)4(OH)2•8H2O P 2/a 2/m
 
08.DH.15 Jahnsite-(NaMnMg)! NaMnMg2Fe2(PO4)4(OH)2•8H2O P 2/a 2/m
 

Other Whiteite-(CaFeMg) Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Whiteite-(CaFeMg) :
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 Whiteite-(CaFeMg) Specimen Label here :

Whiteite-(CaFeMg)

Ca(Fe++,Mn++)Mg2Al2(PO4)4(OH)2•8(H2O)
Dana No: 42.11.03.01 Strunz No: 08.DH.15
Locality:

 

Notes:

 

 
   
 


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