Hotsonite-VI Mineral Data

General Hotsonite-VI Information

Chemical Formula:

Al5(SO4)(PO4)(OH)10•8(H2O)

Composition:

Molecular Weight = 640.14 gm

Aluminum 21.07 % Al 39.82 % Al₂O₃

Phosphorus 4.84 % P 11.09 % P₂O₅

Hydrogen 4.09 % H 36.59 % H₂O

Sulfur 5.01 % S 12.51 % SO₃

Oxygen 64.98 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Al₅(SO₄)(PO₄)(OH)₁₀•8(H₂O)

Environment:

In a sillimanite quarry encrusting zaherite.

IMA Status:

Approved IMA 1984

Locality:

Hotson 42, about 65 km W of Pofadder, Bushmanland, Cape Province, South Africa. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Hotsonite-VI + Pronunciation

Hotsonite-VI Crystallography

Axial Ratios:

a:b:c =0.9631:1:0.9048

Cell Dimensions:

a = 11.23, b = 11.66, c = 10.55, Z = 2; alpha = 112.533°, beta = 107.533°, gamma = 64.45° V = 1,097.72 Den(Calc)= 1.94

Crystal System:

Triclinic Space 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-VI

Color:

White, Colorless.

Density:

2.06

Fracture:

Earthy - Dull, clay-like fractures with no visible crystalline affinities, (e.g. howlite).

Habit:

Compact - Occurs as a compact mass.

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Hardness:

2.5 - Finger Nail

Luster:

Silky

Streak:

white

Optical Properties of Hotsonite-VI

Gladstone-Dale:

CI meas= -0.013 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.116 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2781,KPDmeas= 0.2524,KC= 0.2492
Ncalc = 1.47 - 1.51

Optical Data:

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

Calculated Properties of Hotsonite-VI

Electron Density:

Bulk Density (Electron Density)=2.12 gm/cc
note: Specific Gravity of Hotsonite-VI =2.06 gm/cc.

Fermion Index:

Fermion Index = 0.000693754
Boson Index = 0.999306246

Photoelectric:

PE_Hotsonite-VI= 1.24 barns/electron
U=PE_Hotsonite-VI x rElectron Density= 2.64 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hotsonite-VI is Not Radioactive

Hotsonite-VI Classification

Dana Class:

32.04.05.01 (32)Compound Sulfates

(32.04)(hydrous) with poly-anionic formula

(32.04.05)Dana Group

32.04.05.01 Hotsonite-VI Al5(SO4)(PO4)(OH)10•8(H2O) P1 or P1 Tri

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-VI Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Hotsonite-VI :
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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Print or Cut-and-Paste your Hotsonite-VI Specimen Label here :

Hotsonite-VI

Al5(SO4)(PO4)(OH)10•8(H2O)
Dana No: 32.04.05.01 Strunz No: 08.DF.05
Locality:

Notes:

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