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Hotsonite-VII Mineral Data

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General Hotsonite-VII Information

Help on Chemical  Formula: Chemical Formula: Al11(SO4)3(PO4)2(OH)21•16(H2O)
Help on Composition: Composition: Molecular Weight = 1,420.33 gm
   Aluminum    20.90 %  Al   39.48 % Al2O3
   Phosphorus   4.36 %  P     9.99 % P2O5
   Hydrogen     3.76 %  H    33.61 % H2O
   Sulfur       6.77 %  S    16.91 % SO3
   Oxygen      64.21 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Al11(SO4)3(PO4)2(OH)21•16(H2O)
Help on IMA Status: IMA Status: Approved IMA 1984
Help on Locality: Locality: Hotson farm, Pofadder, South Africa. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Hotsonite-VII + Pronunciation Say HOTSONITE-VII

Hotsonite-VII Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9631:1:0.9048
Help on Cell Dimensions: Cell Dimensions: a = 11.23, b = 11.66, c = 10.55, Z = 1; alpha = 112.54°, beta = 107.53°, gamma = 64.45° V = 1,097.68 Den(Calc)= 2.15
Help on Crystal System: Crystal System: Triclinic Space Group: P1 or P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 10.05(1), 8.45(0.4), 4.63(0.2),

Physical Properties of Hotsonite-VII

Help on Color: Color: White.
Help on Density: Density: 2.06
Help on Habit: Habit: Compact - Occurs as a compact mass.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Silky
Help on Streak: Streak: white

Optical Properties of Hotsonite-VII

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.034 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.024 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.25,KPDmeas= 0.2524,KC= 0.2442
Ncalc = 1.5 - 1.51
Help on Optical Data: Optical Data: Biaxial (?), a=1.519, g=1.521, bire=0.0020

Calculated Properties of Hotsonite-VII

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.14 gm/cc
note: Specific Gravity of Hotsonite-VII =2.08 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0008218107
Boson Index = 0.9991781893
Help on Photoelectric: Photoelectric: PEHotsonite-VII = 1.31 barns/electron
U=PEHotsonite-VII x rElectron Density= 2.80 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hotsonite-VII is Not Radioactive

Hotsonite-VII Classification

Help on  Dana Class: Dana Class: (43)Compound Phosphates, etc.
  (43.05)(Hydrated Compound Anions With Hydroxyl or Halogen)
  (43.05.18)Dana Group Hotsonite-VII Al11(SO4)3(PO4)2(OH)21•16(H2O) P1 or P1 Tri
Help on  Strunz Class: Strunz Class: 08.DF.05 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DF -With only medium-sized cations, (OH,etc.):RO4 > 3:1
08.DF.05 Hotsonite-VI Al5(SO4)(PO4)(OH)10•8(H2O) P1 or P1 Tri
08.DF.05 Hotsonite-VII Al11(SO4)3(PO4)2(OH)21•16(H2O) P1 or P1 Tri

Other Hotsonite-VII Information

Help on References: References: NAME( Dana8) 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 Hotsonite-VII :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 08.DF.05





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