Mineralogy Database

Rostite Mineral Data

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General Rostite Information

Help on Chemical  Formula: Chemical Formula: AlSO4(OH,F)•5(H2O)
Help on Composition: Composition: Molecular Weight = 230.53 gm
   Aluminum  11.70 %  Al   22.11 % Al2O3
   Hydrogen   4.72 %  H    42.20 % H2O
   Sulfur    13.91 %  S    34.73 % SO3
   Oxygen    68.02 %  O
   Fluorine   1.65 %  F     1.65 % F
               -   %   F    -0.69 % -O=F2    
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Al(SO4)(OH)0.8F0.2•5(H2O)
Help on Environment: Environment: Burning mine waste heaps with copiapite and ammonia alum. Dimorphous with jurbanite, compare khademite. Redefined 1987.
Help on IMA Status: IMA Status: Approved IMA 1979
Help on Locality: Locality: Schoeller Coal Mine, Libusin, Kladno district, Bohemia, Czech Republic. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Rudolph Rost (1912-), Czech mineralogist.
Help on Name Pronunciation: Name Pronunciation: Rostite Say ROSTITE
Help on Synonym: Synonym: Lapparentite

Rostite Image

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  Clairite   Rostite

Comments: Brownish crystals of clairite on white massive rostite.
Location: Anna Mine, Alsdorf, Aachen, North Rhine-Westphalia, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

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Comments: White crystals of rostite on a dark matrix.
Location: Alsdorf, Aachen, North Rhine-Westphalia, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Rostite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8567:1:0.834
Help on Cell Dimensions: Cell Dimensions: a = 11.175, b = 13.043, c = 10.878, Z = 8; V = 1,585.53 Den(Calc)= 1.93
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pcba
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.26(1), 4.19(0.6), 3.91(0.5),2.03(0.1), 2.5(0.1), 2.73(0.1), 3.27(0.1), 3.35(0.1),

Physical Properties of Rostite

Help on Color: Color: White.
Help on Density: Density: 1.892
Help on Habit: Habit: Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Streak: Streak: white

Optical Properties of Rostite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.009 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.028 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2444,KPDmeas= 0.2493,KC= 0.2515
Ncalc = 1.48 - 1.49
Help on Optical Data: Optical Data: Biaxial (+), a=1.461, b=1.47, g=1.484, bire=0.0230

Calculated Properties of Rostite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.97 gm/cc
note: Specific Gravity of Rostite =1.89 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0013767971
Boson Index = 0.9986232029
Help on Photoelectric: Photoelectric: PERostite = 1.30 barns/electron
U=PERostite x rElectron Density= 2.56 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Rostite is Not Radioactive

Rostite 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 Rostite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Rostite :
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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Dana No: Strunz No: 07.DB.10





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