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Lanmuchangite Mineral Data

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General Lanmuchangite Information

Help on Chemical  Formula: Chemical Formula: TlAl(SO4)2•12(H2O)
Help on Composition: Composition: Molecular Weight = 637.87 gm
   Aluminum   4.23 %  Al    7.99 % Al2O3
   Thallium  32.04 %  Tl   33.30 % Tl2O
   Hydrogen   3.76 %  H    33.61 % H2O
   Sulfur    10.05 %  S    25.10 % SO3
   Oxygen    49.91 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: TlAl(SO4)2•11.9(H2O)
Help on Environment: Environment: Secondary mineral in the oxidation zone.
Help on IMA Status: IMA Status: Approved IMA 2001 (Dana # Added)
Help on Locality: Locality: Lanmuchang Tl-Hg deposit, Xinren County, Guizhou Province, China. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Synonym: Synonym: IMA2001-018
 

Lanmuchangite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 12.212, Z = 4; V = 1,821.21 Den(Calc)= 2.33
Help on Crystal System: Crystal System: Isometric - Diploidal H-M Symbol (2/m 3) Space Group: P a3
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.314(1)(220), 2.801(0.7)(331), 7.03(0.54)(111),2.731(0.35)(420), 6.11(0.27)(200), 3.524(0.24)(222), 3.676(0.22),
 

Physical Properties of Lanmuchangite

Help on Color: Color: Light yellow, White.
Help on Density: Density: 2.22
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Anhedral Grains - Granular minerals without the expression of crystal shapes
Help on Habit: Habit: Water Soluble - Water soluble mineral.
Help on Hardness: Hardness: 3-3.5 - Calcite-Copper Penny
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Lanmuchangite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.044 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.005 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2124,KPDmeas= 0.223,KC= 0.2135
Ncalc = 1.47 - 1.5
Help on Optical Data: Optical Data: Isotropic, n=1.495.
 

Calculated Properties of Lanmuchangite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.26 gm/cc
note: Specific Gravity of Lanmuchangite =2.33 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.00099928
Boson Index = 0.99900072
Help on Photoelectric: Photoelectric: PELanmuchangite = 487.32 barns/electron
U=PELanmuchangite x rElectron Density=1,100.08 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lanmuchangite is Not Radioactive
 

Lanmuchangite Classification

Help on  Dana Class: Dana Class: 29.05.05.05 (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 Lanmuchangite Information

Help on References: References: NAME( AmMin, vol 87, p 996) PHYS. PROP.(AmMin, vol 87, p 996) OPTIC PROP.(AmMin, vol 87, p 996)
Help on See Also: See Also: Links to other databases for Lanmuchangite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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

Lanmuchangite

TlAl(SO4)2•12(H2O)
Dana No: 29.05.05.05 Strunz No: 07.CC.20
Locality:

 

Notes:

 

 
   
 


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