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Whiteite-(MnFeMg) Mineral Data

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General Whiteite-(MnFeMg) Information

Help on Chemical  Formula: Chemical Formula: (Mn++,Ca)(Fe++,Mn++)Mg2Al2(PO4)4(OH)2•8(H2O)
Help on Composition: Composition: Molecular Weight = 767.44 gm
   Calcium      1.31 %  Ca    1.83 % CaO
   Magnesium    6.33 %  Mg   10.50 % MgO
   Manganese    7.16 %  Mn    9.24 % MnO
   Aluminum     7.03 %  Al   13.29 % Al2O3
   Iron         5.46 %  Fe    7.02 % FeO
   Phosphorus  16.14 %  P    36.99 % P2O5
   Hydrogen     2.36 %  H    21.13 % H2O
   Oxygen      54.20 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+0.75Ca0.25Fe2+0.75Mn2+0.25Mg2Al2(PO4)4(OH)2�8(H2O)
Help on Environment: Environment: 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-(MnFeMg) Say WHITEITE-(MNFEMG)
 

Whiteite-(MnFeMg) Image

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  Whiteite-(MnFeMg)

Comments: Spherical micro crystalline aggregates of whiteite- (MnFeMg) on matrix to 0.3 mm.
Location: Foote Mine, Kings Mtn. Dist., Cleveland Co., North Carolina, USA. Scale: Specimen Size 2 x 1 x 1 cm.
© Tom Loomis / Dakota Matrix

Whiteite-(MnFeMg) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.1537:1:1.4568
Help on Cell Dimensions: Cell Dimensions: a = 14.99, b = 6.96, c = 10.14, Z = 2; beta = 113.32° V = 971.49 Den(Calc)= 2.62
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 9.32(1), 2.78(0.9), 2.95(0.5),4.82(0.5), 3.25(0.4), 3.52(0.4), 1.64(0.4), 5.6(0.3),
 

Physical Properties of Whiteite-(MnFeMg)

Help on Cleavage: Cleavage: {???} Good
Help on Color: Color: Chocolate brown.
Help on Density: Density: 2.63 - 2.67, Average = 2.65
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: brownish white
 

Optical Properties of Whiteite-(MnFeMg)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.011 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2233,KPDmeas= 0.2208,KC= 0.2233
Ncalc = 1.58 - 1.6
Help on Optical Data: Optical Data: Biaxial (+), a=1.58, b=1.584-1.585, g=1.59-1.591, bire=0.0100-0.0110
 

Calculated Properties of Whiteite-(MnFeMg)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.63 gm/cc
note: Specific Gravity of Whiteite-(MnFeMg) =2.62 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0077724659
Boson Index = 0.9922275341
Help on Photoelectric: Photoelectric: PEWhiteite-(MnFeMg) = 4.67 barns/electron
U=PEWhiteite-(MnFeMg) x rElectron Density= 12.30 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Whiteite-(MnFeMg) is Not Radioactive
 

Whiteite-(MnFeMg) Classification

Help on  Dana Class: Dana Class: 42.11.03.02 (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-(MnFeMg) Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Whiteite-(MnFeMg) :
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-(MnFeMg) Specimen Label here :

Whiteite-(MnFeMg)

(Mn++,Ca)(Fe++,Mn++)Mg2Al2(PO4)4(OH)2•8(H2O)
Dana No: 42.11.03.02 Strunz No: 08.DH.15
Locality:

 

Notes:

 

 
   
 


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