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Gorceixite Mineral Data

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General Gorceixite Information

Help on Chemical  Formula: Chemical Formula: BaAl3(PO4)(PO3OH)(OH)6
Help on Composition: Composition: Molecular Weight = 511.27 gm
   Barium      26.86 %  Ba   29.99 % BaO
   Aluminum    15.83 %  Al   29.91 % Al2O3
   Phosphorus  12.12 %  P    27.76 % P2O5
   Hydrogen     1.38 %  H    12.33 % H2O
   Oxygen      43.81 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: BaAl3(PO4)(PO3OH)(OH)6
Help on Environment: Environment: Alteration of apatite in fossil bones found in Cretaceous sandstone. The original fine structure of the bone is preserved.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1906
Help on Locality: Locality: Bauru Basin, southern Brazil. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the French mineralogist Claude-Henri Gorceix (1842 - 1919) founder of the Mining School (Escola de Minas) in Ouro Preto.
Help on Name Pronunciation: Name Pronunciation: Gorceixite + Pronunciation Say GORCEIXITE
Help on Synonym: Synonym: Fava pebbles
 

Gorceixite Image

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  Gorceixite   Ferrazite

Comments: Translucent platy crystals of gorceixite on tan siderite with white aragonite coatings. Ferrazite is identical to gorceixite.
Location: Rapid Creek, Yukon, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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  Gorceixite

Comments: Translucent, pseudohexagonal crystal of groceixite in matrix.
Location: Rapid Creek, Yukon, Canada. Scale: Crystal Size 3 mm.
© Tom Loomis / Dakota Matrix

Gorceixite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.44897
Help on Cell Dimensions: Cell Dimensions: a = 7.0538, c = 17.2746, Z = 3; V = 744.36 Den(Calc)= 3.42
Help on Crystal System: Crystal System: Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.002(1), 5.753(0.8), 3.516(0.7),
 

Physical Properties of Gorceixite

Help on Cleavage: Cleavage: None
Help on Color: Color: Brown, Gray white, Sky blue, White.
Help on Density: Density: 3.323
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luster: Luster: Vitreous - Dull
Help on Streak: Streak: white
 

Optical Properties of Gorceixite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.031 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.059 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1817,KPDmeas= 0.187,KC= 0.193
Ncalc = 1.64 - 1.66
Help on Optical Data: Optical Data: Uniaxial (+), w=1.618, e=1.625, bire=0.0070.
 

Calculated Properties of Gorceixite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.17 gm/cc
note: Specific Gravity of Gorceixite =3.32 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PEGorceixite = 113.92 barns/electron
U=PEGorceixite x rElectron Density= 361.32 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Gorceixite is Not Radioactive
 

Gorceixite Classification

Help on  Dana Class: Dana Class: 42.07.03.02 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.07)where (AB)5 (XO4)3 Zq � x(H2O)
  (42.07.03)Crandallite Group
 
42.07.03.01 Crandallite CaAl3(PO4)2(OH)5•(H2O) R 3m 3 2/m
 
42.07.03.02 Gorceixite BaAl3(PO4)(PO3OH)(OH)6 R 3m 3 2/m
 
42.07.03.03 Goyazite SrAl3(PO4)2(OH)5•(H2O) R 3m 3 2/m
 
42.07.03.04 Lusungite? (Sr,Pb)Fe3(PO4)2(OH)5•(H2O) R 3m 3m
 
42.07.03.05 Plumbogummite PbAl3(PO4)2(OH)5•(H2O) R 3m 3 2/m
 
42.07.03.06 Kintoreite PbFe3(PO4)2(OH,H2O)6 R 3m 3 2/m
 
42.07.03.07 Benauite! HSrFe3(PO4)2(OH)6 R 3m 3 2/m
 
42.07.03.08 Springcreekite! BaV3(PO4)2(OH,H2O)6 R 3m 3 2/m
Help on  Strunz Class: Strunz Class: 08.BL.10 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BL -With medium-sized and large cations, (OH, etc.):RO4 = 3:1
 
08.BL.10 Arsenogorceixite! BaAl3AsO3(OH)(AsO4,PO4)(OH,F)6 R 3m 3 2/m
 
08.BL.10 Arsenocrandallite (Ca,Sr)Al3[(As,P)O4]2(OH)5•(H2O) R 3m 3m
 
08.BL.10 Ferrazite? (Pb,Ba)3(PO4)2•8(H2O)(?) Tri
 
08.BL.10 Arsenowaylandite* BiAl3(AsO4)2(OH)6 R 3m 3 2/m
 
08.BL.10 Benauite! HSrFe3(PO4)2(OH)6 R 3m 3 2/m
 
08.BL.10 Arsenogoyazite (Sr,Ca,Ba)Al3(AsO4,PO4)2(OH,F)5•(H2O) R 3m 3 2/m
 
08.BL.10 Dussertite BaFe3(AsO4)2(OH)5 R 3m 3m
 
08.BL.10 Crandallite CaAl3(PO4)2(OH)5•(H2O) R 3m 3 2/m
 
08.BL.10 Goyazite SrAl3(PO4)2(OH)5•(H2O) R 3m 3 2/m
 
08.BL.10 Gorceixite BaAl3(PO4)(PO3OH)(OH)6 R 3m 3 2/m
 
08.BL.10 Kintoreite PbFe3(PO4)2(OH,H2O)6 R 3m 3 2/m
 
08.BL.10 Lusungite? (Sr,Pb)Fe3(PO4)2(OH)5•(H2O) R 3m 3m
 
08.BL.10 Philipsbornite PbAl3(AsO4)2(OH)5•(H2O) R 3m-,R 3m Trig
 
08.BL.10 Plumbogummite PbAl3(PO4)2(OH)5•(H2O) R 3m 3 2/m
 
08.BL.10 Segnitite PbFe3H(AsO4)2(OH)6 R 3m 3 2/m
 
08.BL.10 Springcreekite! BaV3(PO4)2(OH,H2O)6 R 3m 3 2/m
 

Other Gorceixite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8, AmMin 91:1951) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Gorceixite :
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 Gorceixite Specimen Label here :

Gorceixite

BaAl3(PO4)(PO3OH)(OH)6
Dana No: 42.07.03.02 Strunz No: 08.BL.10
Locality:

 

Notes:

 

 
   
 


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