Jahnsite-(CaFeFe) Mineral Data + Say JAHNSITE-(CAFEFE)

General Jahnsite-(CaFeFe) Information

Help on Chemical  Formula: Chemical Formula: (Ca,Mn)(Fe++,Mn++)Fe++2Fe+++2(PO4)4(OH)2·8(H2O)
Help on Composition: Composition: Molecular Weight = 851.41 gm
   Calcium      2.82 %  Ca    3.95 % CaO
   Magnesium    2.28 %  Mg    3.79 % MgO
   Manganese    3.87 %  Mn    5.00 % MnO
   Aluminum     0.32 %  Al    0.60 % Al2O3
   Iron        24.93 %  Fe   16.03 % FeO / 17.82 % Fe2O3
   Phosphorus  14.55 %  P    33.34 % P2O5
   Hydrogen     2.37 %  H    21.16 % H2O
   Oxygen      48.86 %  O
              ______        ______ 
              100.00 %      101.69 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca0.6Mn2+0.6Fe2+1.9Mg0.8Fe3+1.9Al0.1(PO4)4·10(H2O)
Help on Environment: Environment: Pliocene-Pleistocene clay deposits in vivianite nodules and secondary phosphates.
Help on IMA Status: IMA Status: Not Approved IMA
Help on Locality: Locality: Hime-Shima, Oita Prefecute and Kobe, Hyogo Prefecture, western Japan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Richard H. Jahns (1915-1983), mineralogist and pegmatite expert, Stanford University, Palo Alto, California, USA.
 

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Jahnsite-(CaFeFe) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.0849:1:1.3802
Help on Cell Dimensions: Cell Dimensions: a = 14.97, b = 7.18, c = 9.91, Z = 2; beta = 110.5° V = 997.72 Den(Calc)= 2.83
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 9.28(1)(001), 4.642(0.5)(002), 2.834(0.35)(302),1.947(0.15)(024,405), 3.091(0.12)(412), 5.017(0.12)(210),
 

Physical Properties of Jahnsite-(CaFeFe)

Help on Color: Color: Dark brown.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Vitreous - Adamantine
 

Calculated Properties of Jahnsite-(CaFeFe)

Help on Electron Density: Electron Density:

relectron=2.82 gm/cc
note: rJahnsite-(CaFeFe) =2.83 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00784
Boson Index = 0.99216
Help on Photoelectric: Photoelectric:

PEJahnsite-(CaFeFe) = 9.39 barns/electron
U=PEJahnsite-(CaFeFe) x relectron= 26.50 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Jahnsite-(CaFeFe) is Not Radioactive

 

Jahnsite-(CaFeFe) Classification

Help on  Dana Class: Dana Class: 37.0.0.0 (37)Phosphate Minerals
  (37.0)Without Dana Classification Numbers
  (Whiteite Group)
Help on  Strunz Class: Strunz Class: VII/X.00-00 VII - Phosphates, Arsenates and Vanadates
  VII/X - Unclassified Strunz Phosphates, Arsenates and Vanadates
  VII/X.00 - Whiteite Group
 

Other Jahnsite-(CaFeFe) Information

Help on References: References: NAME( AmMin, Vol 86, p 1114) PHYS. PROP.(AmMin, Vol 86, p 1114)
Help on See Also: See Also: Links to other databases for Jahnsite-(CaFeFe) :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Jahnsite-(CaFeFe)

(Ca,Mn)(Fe++,Mn++)Fe++2Fe+++2(PO4)4(OH)2·8(H2O)
Dana No: Unknown Strunz No: VII/X.00-00
Locality:

 

Notes:

 

 
   
 
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