Greifensteinite Mineral Data

General Greifensteinite Information

Chemical Formula: Ca2Be4(Fe++,Mn)5(PO4)6(OH)4•6(H2O) 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 Empirical Formula: Ca_1.96Be_4.07Fe²⁺_3.44Mn²⁺_0.86Al_0.23Mg_0.09(PO₄)_5.96(OH)_3.65·6.5(H₂O) Environment: Miarolitic cavities in lithium-rich granite pegmatite. (Fe-dominant analogue of monoclinic roscherite and zanazziite; structure) IMA Status: Approved IMA 2002 (Dana # Added) Locality: Greifenstein, Saxony, Germany. Link to MinDat.org Location Data. Name Origin: Named for the locality. Synonym: IMA2001-044  

Greifensteinite Image

Images:

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

Axial Ratios: a:b:c =1.338:1:0.5618 Cell Dimensions: a = 15.903, b = 11.885, c = 6.677, Z = 2; beta = 94.68° V = 1,257.79 Den(Calc)= 2.93 Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c 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), Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
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

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

Optical Properties of Greifensteinite

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 Optical Data: Biaxial (-), a=1.624, b=1.634, g=1.638, bire=0.0140  

Calculated Properties of Greifensteinite

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

Greifensteinite Classification

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

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

References: NAME( AmMin, 88:1176) PHYS. PROP.(AmMin, 88:1176) OPTIC PROP.(AmMin, 88:1176) 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
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Greifensteinite :

A Bijoux Google Search for Greifensteinite
Adam's Minerals Google Search for Greifensteinite
Cape Minerals Google Search for Greifensteinite
Dakota Matrix Minerals Google Search for Greifensteinite
Excalibur Mineral Corp. Google Search for Greifensteinite
Exceptional Minerals Google Search for Greifensteinite
John Betts Fine Minerals Search for Greifensteinite
McDougall Minerals Google Search for Greifensteinite
Mineral News Website Link
Rock and Mineral Shows Google Search for Greifensteinite
Weinrich Minerals, Inc. Google Search for Greifensteinite

Ask about Greifensteinite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Greifensteinite Specimen Label here :