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Caichengyunite Mineral Data

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General Caichengyunite Information

Help on Chemical  Formula: Chemical Formula: Fe++3Al2(SO4)6•30(H2O)
Help on Composition: Composition: Molecular Weight = 1,345.76 gm
   Aluminum   4.39 %  Al    8.30 % Al2O3
   Iron      13.16 %  Fe   16.92 % FeO
   Hydrogen   4.43 %  H    39.62 % H2O
   Sulfur    14.30 %  S    35.70 % SO3
   Oxygen    63.72 %  O
            ______        ______ 
            100.00 %      100.54 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+3.17Al2.19(SO4)6•29.6(H2O)
Help on Environment: Environment: Forms on the underground walls of the mine.
Help on IMA Status: IMA Status: Not Submitted IMA 2004 (Dana # Added)
Help on Locality: Locality: Pb-Zn mine near the village of Longshu, Hiudong County, Sichuan Province, China. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Cai Chen Yung (1907-1982), Chinese geologist and teacher.

Caichengyunite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.3162:1:0.9382
Help on Cell Dimensions: Cell Dimensions: a = 7.63, b = 24.13, c = 22.64, Z = 4; beta = 111.06° V = 3,889.87 Den(Calc)= 2.30
Help on Crystal System: Crystal System: Monoclinic Space Group: Mono
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.886(1)(131), 3.776(0.21)(124), 5.494(0.14)(121),3.252(0.13)(036), 2.727(0.12)(205,117),

Physical Properties of Caichengyunite

Help on Color: Color: Grayish white.
Help on Density: Density: 2.2
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Water Soluble - Water soluble mineral.
Help on Hardness: Hardness: 1.5-2 - Talc-Gypsum
Help on Luster: Luster: Vitreous - Silky
Help on Streak: Streak: white

Optical Properties of Caichengyunite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.12 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.158 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2078,KPDmeas= 0.2172,KC= 0.2469
Ncalc = 1.54 - 1.57
Help on Optical Data: Optical Data: Biaxial (+), a=1.4756, b=1.4775, g=1.4805, bire=0.0049

Calculated Properties of Caichengyunite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.27 gm/cc
note: Specific Gravity of Caichengyunite =2.20 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0041736278
Boson Index = 0.9958263722
Help on Photoelectric: Photoelectric: PECaichengyunite = 4.81 barns/electron
U=PECaichengyunite x rElectron Density= 10.92 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Caichengyunite is Not Radioactive

Caichengyunite Classification

Help on  Dana Class: Dana Class: (29)Hydrated Acid and Sulfates
  (29.09)with miscellaneous formulae
  (29.09.04)Dana Group Caichengyunite! Fe3Al2(SO4)6•30(H2O) Mono Mono
Help on  Strunz Class: Strunz Class: 07.CB.95 07 - SULFATES (SELENATES, TELLURATES)
  07.C - Sulfates (selenates, etc.) without Additional Anions, with H2O
  07.CB -With only medium-sized cations
07.CB.95 Caichengyunite! Fe3Al2(SO4)6•30(H2O) Mono Mono

Other Caichengyunite Information

Help on References: References: NAME( AmMin, v 89, p 894) PHYS. PROP.(AmMin, v 89, p 894) OPTIC PROP.(AmMin, v 89, p 894)
Help on See Also: See Also: Links to other databases for Caichengyunite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 07.CB.95





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