Mineralogy Database

Khademite Mineral Data

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General Khademite Information

Help on Chemical  Formula: Chemical Formula: Al(SO4)F•5(H2O)
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: Al(SO4)F•5(H2O)
Help on Environment: Environment: Post mine efflorescence.
Help on IMA Status: IMA Status: Approved IMA 1973
Help on Locality: Locality: Lone Pine mine, Catron County, New Mexico, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for N. Khadem, (b1910), director, Geological Survey of Iran.
Help on Name Pronunciation: Name Pronunciation: Khademite + Pronunciation Say KHADEMITE
Help on Synonym: Synonym: ICSD 41562
  PDF 26-1011

Khademite Image

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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

Help on Axial Ratios: Axial Ratios: a:b:c =0.8569:1:0.8342
Help on Cell Dimensions: Cell Dimensions: a = 11.181, b = 13.048, c = 10.885, Z = 8; V = 1,588.01 Den(Calc)= 1.94
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pcab
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.247(1), 4.179(0.7), 2.73(0.6),

Physical Properties of Khademite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless, White.
Help on Density: Density: 1.942
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Efflorescences - Crystals covering matrix, generally produced from transpiro-evaporation.
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Hardness: Hardness: 1-2 - Between Talc and Gypsum
Help on Streak: Streak: white

Optical Properties of Khademite

Help on Gladstone-Dale: 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
Help on Optical Data: 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

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.01 gm/cc
note: Specific Gravity of Khademite =1.94 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0013403601
Boson Index = 0.9986596399
Help on Photoelectric: Photoelectric: PEKhademite = 1.32 barns/electron
U=PEKhademite x rElectron Density= 2.64 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Khademite is Not Radioactive

Khademite Classification

Help on  Dana Class: Dana Class: (31)Hydrated Sulfates Containing Hydroxyl or Halogen
  (31.09)where (A+ B++) (XO4) Zq�x(H2O)
  (31.09.11)Dana Group Khademite Al(SO4)F•5(H2O) Pcab 2/m 2/m 2/m Rostite AlSO4(OH,F)•5(H2O) Pcba 2/m 2/m 2/m
Help on  Strunz Class: 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

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: 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

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Dana No: Strunz No: 07.DB.10





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