Mineralogy Database

Goedkenite Mineral Data

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General Goedkenite Information

Help on Chemical  Formula: Chemical Formula: (Sr,Ca)2Al(PO4)2(OH)
Help on Composition: Composition: Molecular Weight = 385.40 gm
   Strontium   34.10 %  Sr   40.33 % SrO
   Calcium      5.20 %  Ca    7.28 % CaO
   Aluminum     7.00 %  Al   13.23 % Al2O3
   Phosphorus  16.07 %  P    36.83 % P2O5
   Hydrogen     0.26 %  H     2.34 % H2O
   Oxygen      37.36 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Sr1.5Ca0.5Al(PO4)2(OH)
Help on IMA Status: IMA Status: Approved IMA 1975
Help on Locality: Locality: Palermo pegmatite, North Groton, Grafton County, New Hampshire, USA Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for V. L. Goedken.
Help on Name Pronunciation: Name Pronunciation: Goedkenite + Pronunciation Say GOEDKENITE
 

Goedkenite Image

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  Goedkenite

Comments: Clear, pointed goedkenite crystals epitaxially overgrown on palermoite.
Location: Palermo #1 mine, North Groton, Grafton County, New Hampshire, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Goedkenite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.4721:1:1.2648
Help on Cell Dimensions: Cell Dimensions: a = 8.45, b = 5.74, c = 7.26, Z = 2; beta = 113.7° V = 322.43 Den(Calc)= 3.97
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.061(1), 2.585(0.7), 2.841(0.6),
 

Physical Properties of Goedkenite

Help on Cleavage: Cleavage: {100} Good
Help on Color: Color: Colorless, Light yellow.
Help on Density: Density: 3.83
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Vitreous - Adamantine
Help on Streak: Streak: white
 

Optical Properties of Goedkenite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.003 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.032 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1708,KPDmeas= 0.177,KC= 0.1765
Ncalc = 1.68 - 1.7
Help on Optical Data: Optical Data: Biaxial (+), a=1.669, b=1.673, g=1.692, bire=0.0230, 2V(Calc)=50, 2V(Meas)=45-50.
 

Calculated Properties of Goedkenite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.64 gm/cc
note: Specific Gravity of Goedkenite =3.83 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEGoedkenite = 39.61 barns/electron
U=PEGoedkenite x rElectron Density= 144.08 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Goedkenite is Not Radioactive
 

Goedkenite Classification

Help on  Dana Class: Dana Class: 41.10.04.01 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.10)where (A++ B++)3 (XO4)2 Zq
  (41.10.04)Goedkenite Group
 
41.10.04.01 Goedkenite (Sr,Ca)2Al(PO4)2(OH) P 21/m 2/m
 
41.10.04.02 Bearthite Ca2Al(PO4)2(OH) P 21/m 2/m
 
41.10.04.03 Gamagarite Ba2(Fe,Mn)(VO4)2(OH) P 21/m 2/m
 
41.10.04.04 Tokyoite! Ba2Mn(VO4)2(OH) P 21/m 2/m
Help on  Strunz Class: Strunz Class: 08.BG.05 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BG -With medium-sized and large cations, (OH, etc.):RO4 = 0.5:1
 
08.BG.05 Arsenbrackebuschite Pb2(Fe,Zn)(AsO4)2•(H2O) P 21/m 2/m
 
08.BG.05 Bearthite Ca2Al(PO4)2(OH) P 21/m 2/m
 
08.BG.05 Arsentsumebite Pb2Cu(AsO4)(SO4)(OH) P 21/m 2/m
 
08.BG.05 Brackebuschite Pb2(Mn,Fe)(VO4)2(OH) P 21/m 2/m
 
08.BG.05 Feinglosite! Pb2(Zn,Fe)[(As,S)O4]2•(H2O) P 21,P 21/m Mono
 
08.BG.05 Gamagarite Ba2(Fe,Mn)(VO4)2(OH) P 21/m 2/m
 
08.BG.05 Goedkenite (Sr,Ca)2Al(PO4)2(OH) P 21/m 2/m
 
08.BG.05 Tsumebite Pb2Cu(PO4)(SO4)(OH) P 21/m 2/m
 
08.BG.05 Calderonite! Pb2Fe(VO4)2(OH) P 21/m 2/m
 
08.BG.05 Bushmakinite! Pb2Al(PO4)(VO4)(OH) P 21/m 2/m
 
08.BG.05 Tokyoite! Ba2Mn(VO4)2(OH) P 21/m 2/m
 

Other Goedkenite Information

Help on References: References: PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Goedkenite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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

Goedkenite

(Sr,Ca)2Al(PO4)2(OH)
Dana No: 41.10.04.01 Strunz No: 08.BG.05
Locality:

 

Notes:

 

 
   
 


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