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: Ca_1.96Be_4.07Fe²⁺_3.44Mn²⁺_0.86Al_0.23Mg_0.09(PO₄)_5.96(OH)_3.65ƒL6.5(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

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 - PrismaticH-M Symbol (2/m) Space Group: C 2/c

Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/I_o): 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),

Click Here for Large Greifensteinite Structure Window Crystal Structure:

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Help on Above

Rastsvetaeva R K , Gurbanova O A , Chukanov N V , Doklady Chemistry , 383 (2002) p.78-81, Crystal structure of greifensteinite, Ca2Be4(Fe2+,Mn)5(PO4)6(OH)4*6H2O, Locality: Greifenstein, Saxony, Germany

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: PE_{Greifensteinite}= 7.92 barns/electron
U=PE_{Greifensteinite} 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 ƒL 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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Print or Cut-and-Paste your Greifensteinite Specimen Label here :

Greifensteinite

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

Notes: