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Greifensteinite Mineral Data

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General Greifensteinite Information

Help on Chemical  Formula: Chemical Formula: Ca2Be4(Fe++,Mn)5(PO4)6(OH)4•6(H2O)
Help on Composition: Composition: Molecular Weight = 1,108.19 gm
   Calcium      7.09 %  Ca    9.92 % CaO
   Magnesium    0.20 %  Mg    0.33 % MgO
   Manganese    4.26 %  Mn    5.51 % MnO
   Beryllium    3.31 %  Be    9.19 % BeO
   Aluminum     0.56 %  Al    1.06 % Al2O3
   Iron        17.34 %  Fe   22.30 % FeO
   Phosphorus  16.66 %  P    38.17 % P2O5
   Hydrogen     1.51 %  H    13.53 % H2O
   Oxygen      49.07 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca1.96Be4.07Fe2+3.44Mn2+0.86Al0.23Mg0.09(PO4)5.96(OH)3.65�6.5(H2O)
Help on Environment: Environment: Miarolitic cavities in lithium-rich granite pegmatite. (Fe-dominant analogue of monoclinic roscherite and zanazziite; structure)
Help on IMA Status: IMA Status: Approved IMA 2002 (Dana # Added)
Help on Locality: Locality: Greifenstein, Saxony, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Synonym: Synonym: IMA2001-044
 

Greifensteinite Image

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  Greifensteinite

Comments: Tabular crystal of greifensteinite impaled on acicular tourmaline.
Location: Greifenstein Rocks, Ehrenfriedersdorf, Erzgebirge, Saxony, Germany. Scale: Picture size 1 mm.
© Thomas Witzke / Abraxas-Verlag

Greifensteinite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.338:1:0.5618
Help on Cell Dimensions: Cell Dimensions: a = 15.903, b = 11.885, c = 6.677, Z = 2; beta = 94.68° V = 1,257.79 Den(Calc)= 2.93
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 9.48(1)(110), 3.96(0.9)(400), 2.783(0.8)(240),5.94(0.8)(020), 2.638(0.7)(600), 2.982(0.7)(202), 3.068(0.6)(510), 4.82(0.6)(310),
 

Physical Properties of Greifensteinite

Help on Cleavage: Cleavage: {100} Parting
Help on Color: Color: Dark olive green.
Help on Density: Density: 2.93
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: green
 

Optical Properties of Greifensteinite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.006 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.006 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2157,KPDmeas= 0.2157,KC= 0.2144
Ncalc = 1.63
Help on Optical Data: Optical Data: Biaxial (-), a=1.624, b=1.634, g=1.638, bire=0.0140
 

Calculated Properties of Greifensteinite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.90 gm/cc
note: Specific Gravity of Greifensteinite =2.93 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEGreifensteinite = 7.92 barns/electron
U=PEGreifensteinite x rElectron Density= 22.96 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Greifensteinite is Not Radioactive
 

Greifensteinite Classification

Help on  Dana Class: Dana Class: 42.07.07.04 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.07)where (AB)5 (XO4)3 Zq � x(H2O)
  (42.07.07)Roscherite group
 
42.07.07.01 Roscherite Ca(Mn,Fe)5Be4(PO4)6(OH)4•6(H2O) C1 1
 
42.07.07.03 Zanazziite Ca2(Mg,Fe)(Mg,Fe,Al,Mn,Fe)4Be4(PO4)6(OH)4•6(H2O) C 2/c 2/m
 
42.07.07.04 Greifensteinite! Ca2Be4(Fe,Mn)5(PO4)6(OH)4•6(H2O) C 2/c 2/m
 
42.07.07.05 Atencioite! Ca2Fe[]Mg2Fe2Be4(PO4)6(OH)4•6H2O P1 1
 
42.07.07.06 Guimaraesite Ca2(Zn,Mg,Fe)5Be4(PO4)6(OH)4•6H2O C 2/c 2/m
 
42.07.07.07 Footemineite! Ca2MnMn2Mn2Be4(PO4)6(OH)4•6H2O P1 1
 
42.07.07.08 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 Greifensteinite Information

Help on References: References: NAME( AmMin, 88:1176) PHYS. PROP.(AmMin, 88:1176) OPTIC PROP.(AmMin, 88:1176)
Help on See Also: See Also: Links to other databases for Greifensteinite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Greifensteinite

Ca2Be4(Fe++,Mn)5(PO4)6(OH)4•6(H2O)
Dana No: 42.07.07.04 Strunz No: 08.DA.10
Locality:

 

Notes:

 

 
   
 


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