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.

Name Pronunciation:

Khademite + Pronunciation

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 - Dipyramidal H-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),

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:

PE_Khademite= 1.32 barns/electron
U=PE_Khademite x rElectron 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) Zqï¿½x(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

Search for Khademite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Khademite :

Ask about Khademite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Khademite

Al(SO4)F•5(H2O)
Dana No: 31.09.11.01 Strunz No: 07.DB.10
Locality:

Notes:

Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.