Lonecreekite Mineral Data

Lonecreekite Mineral Data
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General Lonecreekite Information

Help on Chemical Formula: Chemical Formula: (NH4)(Fe+++,Al)(SO4)2•12(H2O)
Help on Composition: Composition: Molecular Weight = 474.98 gm
   Aluminum   1.42 %  Al    2.68 % Al2O3
   Iron       8.82 %  Fe   12.61 % Fe2O3
   Hydrogen   0.85 %  H      -   % Calc as (NH4)2O
   Hydrogen   5.09 %  H    45.51 % H2O
   Sulfur    13.50 %  S    33.71 % SO3
   Nitrogen   2.95 %  N     5.48 % (NH4)2O
   Oxygen    67.37 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: (NH4)Fe3+0.75Al0.25(SO4)2•12(H2O)
Help on IMA Status: IMA Status: Approved IMA 1983
Help on Locality: Locality: Lone Creek Fall cave, near Sabie, eastern Transvaal, South Africa. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Lonecreekite + Pronunciation Say LONECREEKITE
 

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Lonecreekite Crystallography
Help on Cell Dimensions: Cell Dimensions: a = 12.302, Z = 4; V = 1,861.78 Den(Calc)= 1.69
Help on Crystal System: Crystal System: Isometric - DiploidalH-M Symbol (2/m 3) Space Group: P a3
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.356(1), 7.12(0.7), 3.289(0.65),
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Physical Properties of Lonecreekite

Help on Color: Color: Colorless.
Help on Density: Density: 1.693
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Lonecreekite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.099 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.101 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2858,KPDmeas= 0.2853,KC= 0.2597
Ncalc = 1.44
Help on Optical Data: Optical Data: Isotropic, n=1.483.
 

Calculated Properties of Lonecreekite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.78 gm/cc
note: Specific Gravity of Lonecreekite =1.69 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PELonecreekite = 3.44 barns/electron
U=PELonecreekite x rElectron Density= 6.13 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lonecreekite is Not Radioactive
 

Lonecreekite Classification
Help on Dana Class: Dana Class: 29.05.05.04 (29)Hydrated Acid and Sulfates
  (29.05)where A B (XO4)2 · x(H2O)
  (29.05.05)Alum Group
 
29.05.05.01 Alum-(K) KAl(SO4)2•12(H2O) P a3 2/m 3
 
29.05.05.02 Alum-(Na) NaAl(SO4)2•12(H2O) P a3 2/m 3
 
29.05.05.03 Tschermigite (NH4)Al(SO4)2•12(H2O) P a3 2/m 3
 
29.05.05.04 Lonecreekite (NH4)(Fe,Al)(SO4)2•12(H2O) P a3 2/m 3
 
29.05.05.05 Lanmuchangite! TlAl(SO4)2•12(H2O) P a3 2/m 3
Help on Strunz Class: Strunz Class: 07.CC.20 07 - SULFATES (SELENATES, TELLURATES)
  07.C - Sulfates (selenates, etc.) without Additional Anions, with H2O
  07.CC -With medium-sized and large cations
 
07.CC.20 Lonecreekite (NH4)(Fe,Al)(SO4)2•12(H2O) P a3 2/m 3
 
07.CC.20 Alum-(K) KAl(SO4)2•12(H2O) P a3 2/m 3
 
07.CC.20 Alum-(Na) NaAl(SO4)2•12(H2O) P a3 2/m 3
 
07.CC.20 Lanmuchangite! TlAl(SO4)2•12(H2O) P a3 2/m 3
 
07.CC.20 Tschermigite (NH4)Al(SO4)2•12(H2O) P a3 2/m 3
 

Other Lonecreekite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Lonecreekite :
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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Lonecreekite

(NH4)(Fe+++,Al)(SO4)2•12(H2O)
Dana No: 29.05.05.04 Strunz No: 07.CC.20
Locality:

 

Notes: