Mineralogy Database

Wilhelmramsayite Mineral Data

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General Wilhelmramsayite Information

Help on Chemical  Formula: Chemical Formula: Cu3FeS3•2(H2O)
Help on Composition: Composition: Molecular Weight = 378.36 gm
   Potassium   0.31 %  K
   Sodium      0.12 %  Na
   Thallium    0.54 %  Tl
   Iron       15.35 %  Fe
   Copper     48.87 %  Cu
   Hydrogen    1.05 %  H
   Sulfur     25.42 %  S
   Oxygen      8.33 %  O
             100.00 % 
Help on Empirical Formula: Empirical Formula: Cu2.91Fe2+1.04S3K0.03Na0.02Tl0.01•1.97(H2O)
Help on Environment: Environment: Occurs in the core zone of an ultra-agpaitic pegmatite generally of potassium feldspar�nepheline�sodalite�alkali amphibole-pyroxene composition.
Help on IMA Status: IMA Status: Approved IMA 2004 (Dana # Added)
Help on Locality: Locality: Koashva Mountain, Khibiny massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Name for Wilhelm Ramsay, Finnish geologist who did the first detailed study of the Khibiny-Lovozero alkaline complexes.
Help on Synonym: Synonym: IMA2004-033

Wilhelmramsayite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.7061:1:0.8079
Help on Cell Dimensions: Cell Dimensions: a = 5.147, b = 7.289, c = 5.889, Z = 1; V = 220.93 Den(Calc)= 2.84
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P mmm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.104(1), 1.897(0.7), 1.828(0.5),2.292(0.5), 2.727(0.5), 4.21(0.4), 5.12(0.4), 3.69(0.3),

Physical Properties of Wilhelmramsayite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Dark lead gray, Iron black.
Help on Density: Density: 2.75
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Flexible - Flexible fragments.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Metallic
Help on Magnetism: Magnetism: Weakly ferromagnetic

Optical Properties of Wilhelmramsayite

Help on RL Anisotrophism: RL Anisotrophism: Weak with no internal reflections.
Help on RL Bireflectance: RL Bireflectance: Weakly bluish gray to gray with bluish tints.
Help on RL Color: RL Color: Bluish gray.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Wilhelmramsayite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   14.95   17.45 
 470 nm   13.70   16.35 
 546 nm   11.35   14.00 
 589 nm   10.00   12.55 
 650 nm    8.65   11.00 
 700 nm    8.00    9.80 
Calculated Relative Intensity Colors of Wilhelmramsayite in Air
   0%   90% 100% 180% 270% 360% 450% 540% 630% 720% 810% 880%

Calculated Properties of Wilhelmramsayite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.71 gm/cc
note: Specific Gravity of Wilhelmramsayite =2.84 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0052030927
Boson Index = 0.9947969073
Help on Photoelectric: Photoelectric: PEWilhelmramsayite = 35.94 barns/electron
U=PEWilhelmramsayite x relectron= 97.50 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 4.28 (Gamma Ray American Petroleum Institute Units)
Concentration of Wilhelmramsayite per GRapi unit = 23.39 (%)

Estimated Radioactivity from Wilhelmramsayite - barely detectable


Wilhelmramsayite Classification

Help on  Dana Class: Dana Class: (02)Sulfides - Including Selenides and Tellurides
  (02.14)(Hydroxyl or Hydrated)
  (02.14.08)Dana Group Wilhelmramsayite! Cu3FeS3•2(H2O) P mmm 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 02.FD.40 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.F - Sulfides of Arsenic, Alkalies; Sulfides with Halide, Oxide, Hydroxide, H2O
  02.FD -With O, OH, H2O
02.FD.40 Wilhelmramsayite! Cu3FeS3•2(H2O) P mmm 2/m 2/m 2/m

Other Wilhelmramsayite Information

Help on References: References: NAME( AmMin, v94:407) PHYS. PROP.(AmMin, v94:407) OPTIC PROP.(AmMin, v94:407)
Help on See Also: See Also: Links to other databases for Wilhelmramsayite :
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: 02.FD.40





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