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 % Al2 O3
Hydrogen 4.34 % H 38.81 % H2 O
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(H2 O)
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.
Name Pronunciation:
Khademite + Pronunciation
Synonym:
ICSD 41562
PDF 26-1011
Khademite Image
Images:
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 - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pcab
X Ray Diffraction:
By Intensity(I/Io ): 4.247(1), 4.179(0.7), 2.73(0.6),
Physical Properties of Khademite
Cleavage:
None
Color:
Colorless, White.
Density:
1.942
Diaphaneity:
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 Ncalc = 1.47
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:
Bulk Density (Electron Density)=2.01 gm/cc note: Specific Gravity of Khademite =1.94 gm/cc.
Fermion Index:
Fermion Index = 0.0013403601 Boson Index = 0.9986596399
Photoelectric:
PEKhademite = 1.32 barns/electronU=PEKhademite x r Electron Density= 2.64 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Khademite is Not Radioactive
Khademite Classification
Dana Class:
31.09.11.01 (31) Hydrated Sulfates Containing Hydroxyl or Halogen
(31.09) where (A+ B++) (XO4) Zq�x(H2O)
(31.09.11) Dana Group
31.09.11.01 Khademite Al(SO4)F•5(H2O) Pcab 2/m 2/m 2/m
31.09.11.02 Rostite AlSO4(OH,F)•5(H2O) Pcba 2/m 2/m 2/m
Strunz Class:
07.DB.10 07 - SULFATES (SELENATES, TELLURATES)
07.D - Sulfates (selenates, etc.) with additional anions, with H2O
07.DB -With only medium-sized cations; insular octahedra and finite groups
07.DB.10 Khademite Al(SO4)F•5(H2O) Pcab 2/m 2/m 2/m
07.DB.10 Rostite AlSO4(OH,F)•5(H2O) Pcba 2/m 2/m 2/m
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 - 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
15 - WWW-MINCRYST
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Khademite
Al(SO4)F•5(H2O)
Dana No: 31.09.11.01 Strunz No: 07.DB.10
Locality:
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