Wilhelmramsayite Mineral Data

Advertisment

General Wilhelmramsayite Information

Chemical Formula:

Cu3FeS3•2(H2O)

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 %

Empirical Formula:

Cu_2.91Fe²⁺_1.04S₃K_0.03Na_0.02Tl_0.01•1.97(H₂O)

Environment:

Occurs in the core zone of an ultra-agpaitic pegmatite generally of potassium feldspar–nepheline–sodalite–alkali amphibole-pyroxene composition.

IMA Status:

Approved IMA 2004 (Dana # Added)

Locality:

Koashva Mountain, Khibiny massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Name for Wilhelm Ramsay, Finnish geologist who did the first detailed study of the Khibiny-Lovozero alkaline complexes.

Synonym:

IMA2004-033

Search for Wilhelmramsayite Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Wilhelmramsayite Crystallography

Axial Ratios:

a:b:c =0.7061:1:0.8079

Cell Dimensions:

a = 5.147, b = 7.289, c = 5.889, Z = 1; V = 220.93 Den(Calc)= 2.84

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: P mmm

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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

Cleavage:

{001} Perfect

Color:

Dark lead gray, Iron black.

Density:

2.75

Diaphaneity:

Opaque

Fracture:

Flexible - Flexible fragments.

Habit:

Platy - Sheet forms (e.g. micas).

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

2.5 - Finger Nail

Luster:

Metallic

Magnetism:

Weakly ferromagnetic

Optical Properties of Wilhelmramsayite

RL Anisotrophism:

Weak with no internal reflections.

RL Bireflectance:

Weakly bluish gray to gray with bluish tints.

RL Color:

Bluish gray.

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**
Relative Intensity	0%	90%	100%	180%	270%	360%	450%	540%	630%	720%	810%	880%
R₁
R₂

Calculated Properties of Wilhelmramsayite

Electron Density:

Bulk Density (Electron Density)=2.71 gm/cc
note: Specific Gravity of Wilhelmramsayite =2.84 gm/cc.

Fermion Index:

Fermion Index = 0.0052030927
Boson Index = 0.9947969073

Photoelectric:

PE_{Wilhelmramsayite}= 35.94 barns/electron
U=PE_{Wilhelmramsayite} x r_electron= 97.50 barns/cc.

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

Dana Class:

02.14.08.01 (02)Sulfides - Including Selenides and Tellurides

(02.14)(Hydroxyl or Hydrated)

(02.14.08)Dana Group

02.14.08.01 Wilhelmramsayite! Cu3FeS3•2(H2O) P mmm 2/m 2/m 2/m

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

References:

NAME( AmMin, v94:407) PHYS. PROP.(AmMin, v94:407) OPTIC PROP.(AmMin, v94:407)

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

Search for Wilhelmramsayite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Wilhelmramsayite :

Dakota Matrix Minerals Google Search for Wilhelmramsayite
John Betts Fine Minerals Search for Wilhelmramsayite
McDougall Minerals Google Search for Wilhelmramsayite
Rock and Mineral Shows Google Search for Wilhelmramsayite
Weinrich Minerals, Inc. Google Search for Wilhelmramsayite

Ask about Wilhelmramsayite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Wilhelmramsayite

Cu3FeS3•2(H2O)
Dana No: 02.14.08.01 Strunz No: 02.FD.40
Locality:

Notes: