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Footemineite Mineral Data

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General Footemineite Information

Help on Chemical  Formula: Chemical Formula: Ca2Mn++Mn++2Mn++2Be4(PO4)6(OH)4•6H2O
Help on Composition: Composition: Molecular Weight = 1,122.79 gm
   Barium       0.24 %  Ba    0.27 % BaO
   Strontium    0.23 %  Sr    0.28 % SrO
   Lithium      0.11 %  Li    0.23 % Li2O
   Calcium      6.75 %  Ca    9.44 % CaO
   Magnesium    0.11 %  Mg    0.18 % MgO
   Manganese   20.31 %  Mn   26.22 % MnO
   Beryllium    3.45 %  Be    9.58 % BeO
   Aluminum     0.07 %  Al    0.14 % Al2O3
   Iron         2.59 %  Fe    2.75 % FeO /  0.64 % Fe2O3
   Silicon      0.20 %  Si    0.43 % SiO2
   Phosphorus  16.03 %  P    36.73 % P2O5
   Hydrogen     1.47 %  H    13.12 % H2O
   Oxygen      48.45 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca1.89Sr0.03Ba0.02Mn2+0.9Li0.17Mg0.05Mn2+3.25Fe2+0.43Fe3+0.09Al0.03Be4.3P5.81 Si0.08O24(OH)3.64(H2O)0.36�6(H2O)
Help on Environment: Environment: Late fracture-filling mineral in a quartz-microcline-spodumene pegmatite. Dimorphous with roscherite. Isostructural with atencioite.
Help on IMA Status: IMA Status: Approved IMA 2006 (Dana # Added)
Help on Locality: Locality: Foote Mine, Kings Mountain District, Cleveland Co.unty, North Carolina, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Synonym: Synonym: IMA2006-029
  Roscherite (C-1)

Footemineite Image

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Comments: Yellow, barrel-shaped, prismatic footemineite crystal (AmMin v93:2.
Location: Foote Lithium Co. Mine (Foote Mine), Kings Mountain District, Cleveland Co., North Carolina, U.S.A. Scale: Crystal size 0.8 mm.
© American Mineralogist

Footemineite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.6807:1:1.0042
Help on Cell Dimensions: Cell Dimensions: a = 6.788, b = 9.972, c = 10.014, Z = 2; alpha = 73.84°, beta = 85.34°, gamma = 87.44° V = 648.26 Den(Calc)= 5.75
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 5.998(1)(011), 9.575(0.53)(010), 3.192(0.44)(210),2.803(0.38)(103), 2.65(0.29)(202), 4.848(0.26)(021), 2.424(0.14)(231), 3.003(0.14)(022),

Physical Properties of Footemineite

Help on Cleavage: Cleavage: {011} Good, {100} Good
Help on Color: Color: Yellow.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Bladed - Aggregates of thin lath-like crystals (e.g. kyanite).
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: white

Optical Properties of Footemineite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.496 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.109,KC= 0.2165
Ncalc = 2.24
Help on Optical Data: Optical Data: Biaxial (+), a=1.62, b=1.627, g=1.634, bire=0.0140, 2V(Calc)=88, 2V(Meas)=80. Dispersion r < v or r>v, weak.

Calculated Properties of Footemineite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.66 gm/cc
note: Specific Gravity of Footemineite =5.75 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEFootemineite = 8.80 barns/electron
U=PEFootemineite x rElectron Density= 49.80 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Footemineite is Not Radioactive

Footemineite Classification

Help on  Dana Class: Dana Class: (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.07)where (AB)5 (XO4)3 Zq � x(H2O)
  (42.07.07)Roscherite group Roscherite Ca(Mn,Fe)5Be4(PO4)6(OH)4•6(H2O) C1 1 Zanazziite Ca2(Mg,Fe)(Mg,Fe,Al,Mn,Fe)4Be4(PO4)6(OH)4•6(H2O) C 2/c 2/m Greifensteinite! Ca2Be4(Fe,Mn)5(PO4)6(OH)4•6(H2O) C 2/c 2/m Atencioite! Ca2Fe[]Mg2Fe2Be4(PO4)6(OH)4•6H2O P1 1 Guimaraesite Ca2(Zn,Mg,Fe)5Be4(PO4)6(OH)4•6H2O C 2/c 2/m Footemineite! Ca2MnMn2Mn2Be4(PO4)6(OH)4•6H2O P1 1 Ruifrancoite! Ca2([],Mn)2(Fe,Mn,Mg)4Be4(PO4)6(OH)4•6H2O C 2/c 2/m
Help on  Strunz Class: Strunz Class: 08.DA.10 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DA -With small (and occasionally larger) cations
08.DA.10 Roscherite Ca(Mn,Fe)5Be4(PO4)6(OH)4•6(H2O) C1 1
08.DA.10 Zanazziite Ca2(Mg,Fe)(Mg,Fe,Al,Mn,Fe)4Be4(PO4)6(OH)4•6(H2O) C 2/c 2/m
08.DA.10 Footemineite! Ca2MnMn2Mn2Be4(PO4)6(OH)4•6H2O P1 1
08.DA.10 Atencioite! Ca2Fe[]Mg2Fe2Be4(PO4)6(OH)4•6H2O P1 1
08.DA.10 Greifensteinite! Ca2Be4(Fe,Mn)5(PO4)6(OH)4•6(H2O) C 2/c 2/m
08.DA.10 Ruifrancoite! Ca2([],Mn)2(Fe,Mn,Mg)4Be4(PO4)6(OH)4•6H2O C 2/c 2/m
08.DA.10 Guimaraesite Ca2(Zn,Mg,Fe)5Be4(PO4)6(OH)4•6H2O C 2/c 2/m

Other Footemineite Information

Help on References: References: NAME( AmMin, v93:1) PHYS. PROP.(AmMin, v93:1) OPTIC PROP.(AmMin, v93:1)
Help on See Also: See Also: Links to other databases for Footemineite :
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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Dana No: Strunz No: 08.DA.10





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