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Wilhelmramsayite

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Koashva Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia

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Formula:
Cu
 
3
FeS
 
3
·2H
 
2
O
System:OrthorhombicColour:dark lead-grey becoming ...
Hardness:2½
Name:For Wilhelm Ramsay (January 20, 1865-January 6, 1928), an outstanding Finnish geologist, mineralogist and petrographer who completed first detailed study of the Khibiny-Lovozcro alkaline complex.
This page provides mineralogical data about Wilhelmramsayite.

Classification of Wilhelmramsayite

IMA status:Approved 2004
Strunz 8th edition ID:2/0.0-
Nickel-Strunz 10th (pending) edition ID:2.FD.40

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
F : Sulfides of arsenic, alkalies; sulfides with halide, oxide, hydroxide, H2O
D : With O, OH, H2O
mindat.org URL:http://www.mindat.org/min-27204.html
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Type Occurrence of Wilhelmramsayite

Type Locality:Koashva Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
Place of Conservation of Type Material:Fernsman Museum
Geological Setting of type material:hypcragpaitic pegmatite

Physical Properties of Wilhelmramsayite

Lustre:Metallic
Colour:dark lead-grey becoming iron-black
Streak:Black
Hardness (Mohs):2½
Hardness (Vickers):VHN100=111 - 121
Cleavage:Perfect
{001}
Fracture:Step-Like
Density (measured):2.75 g/cm3
Density (calculated):2.84 g/cm3

Crystallography of Wilhelmramsayite

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:Pmmm {P2/m 2/m 2/m}
Cell Parameters:a = 5.147Å, b = 7.289Å, c = 5.889Å
Ratio:a:b:c = 0.706 : 1 : 0.808
Unit Cell Volume:V 220.93 ų (Calculated from Unit Cell)
Morphology:Flattened on (001) rectangular lamellar and tabular crystals up to 1 X 5 x 6 mm in size
X-Ray Powder Diffraction:
d-spacingIntensity
5.12 (40)
4.21 (40)
3.69 (30)
3.104 (100)
2.727 (50)
2.292 (50)
1.897 (70)
1.828 (50)

Optical Data of Wilhelmramsayite

Type:Anisotropic
Anisotropism:weak, with bluish and brownish rotation colors
Bireflectance:Weak
Colour in reflected light:bluish-grey
Pleochroism:Weak
Comments:bluish grey to grey with slight bluish tint

Chemical Properties of Wilhelmramsayite

Formula:
Cu
 
3
FeS
 
3
·2H
 
2
O
Essential elements:Cu, Fe, H, O, S
All elements listed in formula:Cu, Fe, H, O, S

Relationship of Wilhelmramsayite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
2.FD.UKI-2004-(OS:BiCuPb)
PbCu
 
4
Bi
 
4
S
 
2
O
 
16
 (?)
2.FD.05Kermesite
Sb
 
2
S
 
2
O
2.FD.10Viaeneite
(Fe,Pb)
 
4
S
 
8
O
2.FD.20Erdite
NaFeS
 
2
 · 2H
 
2
O
2.FD.25Coyoteite
NaFe
 
3
S
 
5
 · 2H
 
2
O
2.FD.30Haapalaite
(Fe
2+
 
,Ni)
 
2
(Mg,Fe
2+
 
)
 
1.61
S
 
2
(OH)
 
3.22
2.FD.30Valleriite
(Fe
2+
 
,Cu)
 
4
(Mg,Al)
 
3
S
 
4
(OH,O)
 
6
2.FD.30Yushkinite
(Mg,Al)V
4+
 
S
 
2
(OH)
 
2
2.FD.35Tochilinite
Fe
2+
5-6
(Mg,Fe
2+
 
)
 
5
S
 
6
(OH)
 
10
2.FD.45Vyalsovite
FeCaAlS(OH)
 
5
2.FD.50Bazhenovite
Ca
 
8
S
 
2
(S
 
3
)(S
 
2
O
 
3
)(OH)
 
12
 · 20H
 
2
O

Other Names for Wilhelmramsayite

Synonyms:
IMA2004-033
Other Languages:
German:Wilhelmramsayit

Other Information

Special Storage/
Display Requirements:		In moist air, wilhelmramsayite becomes iron-black
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Wilhelmramsayite

Reference List:

- +
Pekov, I.V., Chukanov, N.V., Boldyreva, M.M., Dubinchuk, V.T. (2006): Wilhelmramsayite, Cu3FeS3•2H2O, a new mineral from Khibiny Massif, Kola Peninsula. Proceedings of the Russian Mineralogical Society, 135(1), 38-48.

Internet Links for Wilhelmramsayite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
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    • Localities for Wilhelmramsayite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Russia
     
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Khibiny Massif
    		Pekov, I.V., Chukanov, N.V., Boldyreva, M.M., Dubinchuk, V.T. (2006): Wilhelmramsayite, Cu3FeS3•2H2O, a new mineral from Khibiny Massif, Kola Peninsula. Proceedings of the Russian Mineralogical Society, 135(1), 38-48.
    Pekov, I.V., and Agakhanov, A.A. (2008): Geology of Ore Deposits 50(7), 583-589.
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