Hotsonite-VII Mineral Data

Hotsonite-VII Mineral Data +

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General Hotsonite-VII Information

Chemical Formula:

Al11(SO4)3(PO4)2(OH)21·16(H2O)

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

Empirical Formula:

Al₁₁(SO₄)₃(PO₄)₂(OH)₂₁·16(H₂O)

IMA Status:

Approved IMA 1984

Locality:

Hotson farm, Pofadder, South Africa. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

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Hotsonite-VII Crystallography

Axial Ratios:

a:b:c =0.9631:1:0.9048

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

Crystal System:

TriclinicSpace Group: P1 or P1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 10.05(1), 8.45(0.4), 4.63(0.2),

Physical Properties of Hotsonite-VII

Color:

White.

Density:

2.06

Habit:

Compact - Occurs as a compact mass.

Hardness:

2.5 - Finger Nail

Luster:

Silky

Streak:

white

Optical Properties of Hotsonite-VII

Gladstone-Dale:

CI meas= -0.034 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.01 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2419,KPDmeas= 0.2524,KC= 0.2442

Optical Data:

Biaxial (?), a=1.519, g=1.521, bire=0.0020

Calculated Properties of Hotsonite-VII

Electron Density:

r_electron=2.21 gm/cc
note: r_{Hotsonite-VII}=2.15 gm/cc.

Fermion Index

Fermion Index = 0.00082
Boson Index = 0.99918

Photoelectric:

PE_{Hotsonite-VII}= 1.31 barns/electron
U=PE_{Hotsonite-VII} x r_electron= 2.90 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Hotsonite-VII is Not Radioactive

Hotsonite-VII Classification

Dana Class:

43.5.18.1 (43)Compound Phosphates, etc.

(43.5)(Hydrated Compound Anions With Hydroxyl or Halogen)

(43.5.18)Dana Group

43.5.18.1 Hotsonite-VII Al11(SO4)3(PO4)2(OH)21·16(H2O) P1 or P1 Tri

Strunz Class:

VII/D.21-10 VII - Phosphates, Arsenates and Vanadates

VII/D - Water-bearing phosphates with unfamiliar anions, cations of medium size: Cu, Zn, Mn, Al, Fe

VII/D.21 - Hotsonite series

VII/D.21-10* Hotsonite-VI Al5(SO4)(PO4)(OH)10·8(H2O) P1 or P1 Tri

VII/D.21-10 Hotsonite-VII Al11(SO4)3(PO4)2(OH)21·16(H2O) P1 or P1 Tri

Other Hotsonite-VII Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Hotsonite-VII :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Print or Cut-and-Paste your Hotsonite-VII Specimen Label here :

Hotsonite-VII

Al11(SO4)3(PO4)2(OH)21·16(H2O)
Dana No: 43.5.18.1 Strunz No: VII/D.21-10
Locality:

Notes: