Khademite Mineral Data

Khademite Mineral Data +

General Khademite Information

Chemical Formula:

Al(SO4)F·5(H2O)

Composition:

Molecular Weight = 232.12 gm

Aluminum 11.62 % Al 21.96 % Al₂O₃

Hydrogen 4.34 % H 38.81 % H₂O

Sulfur 13.81 % S 34.49 % SO₃

Oxygen 62.03 % O

Fluorine 8.18 % F 8.18 % F

- % F -3.45 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Al(SO₄)F·5(H₂O)

Environment:

Post mine efflorescence.

IMA Status:

Approved IMA 1973

Locality:

Lone Pine mine, Catron County, New Mexico, USA. Link to MinDat.org Location Data.

Name Origin:

Named for N. Khadem, (b1910), director, Geological Survey of Iran.

Synonym:

ICSD 41562

PDF 26-1011

Khademite Image

Images:

Khademite

Comments: Pale blue botryoidal khademite on matrix.
Location: Bergmann Liegendes, Rammelsberg, Harz Mountains, Niedersachsen, Germany. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Khademite Crystallography

Axial Ratios:

a:b:c =0.8569:1:0.8342

Cell Dimensions:

a = 11.181, b = 13.048, c = 10.885, Z = 8; V = 1,588.01 Den(Calc)= 1.94

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pcab

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

By Intensity(I/I_o): 4.247(1), 4.179(0.7), 2.73(0.6),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Bachet B , Cesbron F , Chevalier R , Bulletin de Mineralogie , 104 (1981) p.19-22, Structure cristalline de la khademite Al(SO4)F*5H2O

Physical Properties of Khademite

Cleavage:

None

Color:

Colorless, White.

Density:

1.942

Diaphaniety:

Transparent

Habit:

Efflorescences - Crystals covering matrix, generally produced from transpiro-evaporation.

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Hardness:

1-2 - Between Talc and Gypsum

Streak:

white

Optical Properties of Khademite

Gladstone-Dale:

CI meas= 0.017 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.016 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2383,KPDmeas= 0.2381,KC= 0.2423

Optical Data:

Biaxial (-), a=1.44, b=1.46, g=1.487, bire=0.0470, 2V(Calc)=84, 2V(Meas)=68.

Calculated Properties of Khademite

Electron Density:

r_electron=2.01 gm/cc
note: r_Khademite=1.94 gm/cc.

Fermion Index

Fermion Index = 0.00134
Boson Index = 0.99866

Photoelectric:

PE_Khademite= 1.32 barns/electron
U=PE_Khademite x r_electron= 2.64 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Khademite is Not Radioactive

Khademite Classification

Dana Class:

31.9.11.1 (31)Hydrated Sulfates Containing Hydroxyl or Halogen

(31.9)where (A+ B++) (XO4) Zq·x(H2O)

(31.9.11)Dana Group

31.9.11.1 Khademite Al(SO4)F·5(H2O) Pcab 2/m 2/m 2/m

31.9.11.2 Rostite AlSO4(OH,F)·5(H2O) Pcba 2/m 2/m 2/m

Strunz Class:

VI/D.06-20 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/D - Water-bearing sulfates with unfamiliar anions. cations of medium size

VI/D.06 - Aluminite series, Jurbanite - Zaherite

VI/D.06-10 Jurbanite Al(SO4)(OH)·5(H2O) P 2₁/n 2/m

VI/D.06-20 Khademite Al(SO4)F·5(H2O) Pcab 2/m 2/m 2/m

VI/D.06-20* Rostite AlSO4(OH,F)·5(H2O) Pcba 2/m 2/m 2/m

VI/D.06-30 Meta-aluminite Al2(SO4)(OH)4·5(H2O) P 2₁/c ? 2/m

VI/D.06-40 Aluminite Al2(SO4)(OH)4·7(H2O) P 2₁/c 2/m

VI/D.06-50 Basaluminite Al4(SO4)(OH)10·5(H2O) P 2₁ 2

VI/D.06-60 Felsobanyaite Al4(SO4)(OH)10·5(H2O) Unk Hex

VI/D.06-70 Hydrobasaluminite Al4(SO4)(OH)10·12-36(H2O) Unk. Mono

VI/D.06-80 Zaherite Al12(SO4)5(OH)26·20H20 P1 or P1 Tri

Other Khademite Information

References:

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

See Also:

Links to other databases for Khademite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Print or Cut-and-Paste your Khademite Specimen Label here :

Khademite

Al(SO4)F·5(H2O)
Dana No: 31.9.11.1 Strunz No: VI/D.06-20
Locality:

Notes: