Vantasselite Mineral Data

General Vantasselite Information

Chemical Formula: Al4(PO4)3(OH)3•9(H2O) Composition: Molecular Weight = 606.00 gm    Aluminum    17.81 %  Al   33.65 % Al₂O₃    Phosphorus  15.33 %  P    35.13 % P₂O₅    Hydrogen     3.49 %  H    31.21 % H₂O    Oxygen      63.36 %  O               ______        ______                100.00 %      100.00 % = TOTAL OXIDE Empirical Formula: Al₄(PO₄)₃(OH)₃•9(H₂O) Environment: On the dumps of a quartzite quarry. IMA Status: Approved IMA 1987 Locality: Stavelot massif, Bihain, Belgium. Link to MinDat.org Location Data. Name Origin: Named for Rene Van Tassel (1916-), mineralogist of phosphate and sulfate minerals. Name Pronunciation: Vantasselite + Pronunciation  

Vantasselite Image

Images:

Vantasselite Crystallography

Axial Ratios: a:b:c =0.6364:1:1.2316 Cell Dimensions: a = 10.528, b = 16.541, c = 20.373, Z = 8; V = 3,547.83 Den(Calc)= 2.27 Crystal System: OrthorhombicSpace Group: Pma2,P 2₁am,Pmam X Ray Diffraction: By Intensity(I/I_o): 10.22(1), 2.892(0.5), 3.395(0.4),  

Physical Properties of Vantasselite

Cleavage: {001} Good Color: Pearl white. Density: 2.3 Diaphaneity: Transparent to Translucent Habit: Rosette - Bundled tabular aggregates resembling rose flower petals. Hardness: 2-2.5 - Gypsum-Finger Nail Luster: Greasy (Oily) Streak: white  

Optical Properties of Vantasselite

Gladstone-Dale: CI meas= 0.005 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.009 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2422,KPDmeas= 0.239,KC= 0.2401
Ncalc = 1.54 - 1.55 Optical Data: Biaxial (-), a=1.511-1.5111, b=1.56, g=1.578, bire=0.0669-0.0670, 2V(Calc)=60, 2V(Meas)=61.  

Calculated Properties of Vantasselite

Electron Density: Bulk Density (Electron Density)=2.35 gm/cc
note: Specific Gravity of Vantasselite =2.30 gm/cc.
Fermion Index: Fermion Index = 0.0003093864
Boson Index = 0.9996906136 Photoelectric: PE_Vantasselite = 1.33 barns/electron
U=PE_Vantasselite x rElectron Density= 3.12 barns/cc.
Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Vantasselite is Not Radioactive  

Vantasselite Classification

Dana Class: 42.12.01.01 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen   (42.12)with miscellaneous formulae   (42.12.01)Dana Group  

42.12.01.01 Vantasselite Al4(PO4)3(OH)3•9(H2O) Pma2,P 2₁am,Pmam Ortho

Strunz Class: 08.DC.37 08 - PHOSPHATES, ARSENATES, VANADATES   08.D - Phosphates, etc   08.DC -With only medium-sized cations, (OH, etc.):RO4 = 1:1 and < 2:1  

08.DC.37 Vantasselite Al4(PO4)3(OH)3•9(H2O) Pma2,P 2₁am,Pmam Ortho

 

Other Vantasselite Information

References: NAME( Dana8) PHYS. PROP.(Bull.Miner.,Vol.107-111,1984-1988) OPTIC PROP.(Bull.Miner.,Vol.107-111,1984-1988) See Also: Links to other databases for Vantasselite :
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
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

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