General Villamaninite Information
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Chemical Formula: |
(Cu,Ni,Co,Fe)S2 |
Composition: |
Molecular Weight = 114.68 gm |
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Iron 0.24 % Fe |
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Cobalt 0.77 % Co |
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Copper 27.71 % Cu |
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Nickel 15.35 % Ni |
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Sulfur 55.92 % S |
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______ |
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100.00 % |
Empirical Formula: |
Cu0.5Ni0.3Co0.015Fe2+0.005S2 |
Environment: |
As subhedral disseminated grains in black bituminous dolostone and in white coarse-grained recrystallized dolostone or as nodular aggregates in vuggy dolomite veinlets. |
IMA Status: |
Valid Species (Pre-IMA) 1920 |
Locality: |
Providencia mine, Mina Cármenes district, near Villamanín, León province, Spain Link to MinDat.org Location Data. |
Name Origin: |
Named for the locality. |
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Villamaninite Image |
Images:
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Villamaninite Crystallography
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Cell Dimensions: |
a = 5.701, Z = 4; V = 185.29 Den(Calc)= 4.11 |
Crystal System: |
Isometric - DiploidalH-M Symbol (2/m 3) Space Group: P a3 |
X Ray Diffraction: |
By Intensity(I/Io): 2.852(1), 1.717(0.4), 2.548(0.3), |
Crystal Structure:
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Marcos C , Paniagua A , Moreiras D B , Garcia-Granda S , Diaz M R , Acta Crystallographica, Section B , 52 (1996) p.899-904, Villamaninite, a case of noncubic pyrite-type structure, Locality: Villamanin, Leon, Spain, Sample: 1, Note: anisoU s from ICSD
View Additional jPOWD Structure files for Villamaninite
[1]
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Physical Properties of Villamaninite
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Cleavage: |
[001] Perfect, [010] Perfect, [100] Perfect |
Color: |
Iron black. |
Density: |
4.523 |
Diaphaniety: |
Opaque |
Fracture: |
Brittle - Uneven - Very brittle fracture producing uneven fragments. |
Habit: |
Euhedral Crystals - Occurs as well-formed crystals showing good external form. |
Habit: |
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite) |
Habit: |
Twinning Common - Crystals are usually twinned. |
Hardness: |
4.5 - Between Fluorite and Apatite |
Luster: |
Metallic |
Streak: |
sooty black |
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Optical Properties of Villamaninite
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RL Color: |
Light blue-gray to violet gray. |
Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Villamaninite in Air
| λ |
R |
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∑ R(λ) |
| 400 nm |
26.90 |
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| 420 nm |
26.70 |
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| 440 nm |
26.50 |
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| 460 nm |
25.80 |
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| 480 nm |
25.10 |
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| 500 nm |
24.50 |
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| 520 nm |
23.80 |
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| 540 nm |
23.40 |
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| 560 nm |
23.20 |
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| 580 nm |
23.40 |
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| 600 nm |
23.90 |
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| 620 nm |
24.80 |
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| 640 nm |
26.00 |
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| 660 nm |
27.60 |
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| 680 nm |
29.40 |
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| 700 nm |
31.40 |
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Calculated Relative Intensity Colors of Villamaninite in Air
Relative Intensity |
0% |
40% |
80% |
100% |
120% |
160% |
200% |
240% |
280% |
320% |
360% |
370% |
| R |
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Calculated Properties of Villamaninite
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Electron Density: |
relectron=3.97 gm/cc note: rVillamaninite =4.11 gm/cc. |
Fermion Index |
Fermion Index = 0.00598 Boson Index = 0.99402 |
Photoelectric: |
PEVillamaninite = 21.62 barns/electron U=PEVillamaninite x relectron= 85.91 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Villamaninite is Not Radioactive |
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Villamaninite Classification
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Dana Class: |
2.12.1.6 (2)Sulfides - Including Selenides and Tellurides |
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(2.12)where Am Bn Xp, with (m+n):p=1:2 |
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(2.12.1)Pyrite Group (Isometric: Pa3) |
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2.12.1.1 Pyrite FeS2 P a3 2/m 3 |
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2.12.1.2 Vaesite NiS2 P a3 2/m 3 |
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2.12.1.3 Cattierite CoS2 P a3 2/m 3 |
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2.12.1.4 Penroseite (Ni,Co,Cu)Se2 P a3 2/m 3 |
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2.12.1.5 Trogtalite CoSe2 P a3 2/m 3 |
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2.12.1.6 Villamaninite (Cu,Ni,Co,Fe)S2 P a3 2/m 3 |
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2.12.1.7 Fukuchilite Cu3FeS8 P a3 2/m 3 |
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2.12.1.8 Krutaite CuSe2 P a3 2/m 3 |
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2.12.1.9 Hauerite MnS2 P a3 2/m 3 |
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2.12.1.10 Laurite RuS2 P a3 2/m 3 |
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2.12.1.11 Aurostibite AuSb2 P a3 2/m 3 |
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2.12.1.12 Krutovite NiAs2 P a3 2/m 3 |
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2.12.1.13 Sperrylite PtAs2 P a3 2/m 3 |
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2.12.1.14 Geversite Pt(Sb,Bi)2 P a3 2/m 3 |
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2.12.1.15 Insizwaite Pt(Bi,Sb)2 P a3 2/m 3 |
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2.12.1.16 Erlichmanite OsS2 P a3 2/m 3 |
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2.12.1.17 Dzharkenite FeSe2 P a3 2/m 3 |
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2.12.1.18 Gaotaiite Ir3Te8 P a3 2/m 3 |
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2.12.1.19 Mayingite IrBiTe P a3 2/m 3 |
Strunz Class: |
II/D.17-20 II - Sulfides and sulphosalts |
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II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold |
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II/D.17 - Pyrite group and related compounds, Fukuchilite - Micherenite |
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II/D.17-10 Fukuchilite Cu3FeS8 P a3 2/m 3 |
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II/D.17-20 Villamaninite (Cu,Ni,Co,Fe)S2 P a3 2/m 3 |
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II/D.17-30 Pyrite FeS2 P a3 2/m 3 |
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II/D.17-40 Cattierite CoS2 P a3 2/m 3 |
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II/D.17-50 Vaesite NiS2 P a3 2/m 3 |
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II/D.17-60 Hauerite MnS2 P a3 2/m 3 |
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II/D.17-65 Dzharkenite FeSe2 P a3 2/m 3 |
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II/D.17-70 Krutaite CuSe2 P a3 2/m 3 |
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II/D.17-80 Trogtalite CoSe2 P a3 2/m 3 |
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II/D.17-90 Penroseite (Ni,Co,Cu)Se2 P a3 2/m 3 |
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II/D.17-100 Laurite RuS2 P a3 2/m 3 |
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II/D.17-110 Erlichmanite OsS2 P a3 2/m 3 |
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II/D.17-120 Sperrylite PtAs2 P a3 2/m 3 |
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II/D.17-130 Aurostibite AuSb2 P a3 2/m 3 |
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II/D.17-140 Geversite Pt(Sb,Bi)2 P a3 2/m 3 |
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II/D.17-150 Insizwaite Pt(Bi,Sb)2 P a3 2/m 3 |
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II/D.17-153 Changchengite! IrBiS P 213 2 3 |
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II/D.17-155 Mayingite IrBiTe P a3 2/m 3 |
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II/D.17-160 Maslovite PtBiTe P 213 2 3 |
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II/D.17-170 Testibiopalladite PdTe(Sb,Te) P 213 2 3 |
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II/D.17-175 Padmaite PdBiSe P 213 2 3 |
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II/D.17-180 Michenerite (Pd,Pt)BiTe P 213 2 3 |
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Other Villamaninite Information
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References: |
NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
See Also: |
Links to other databases for Villamaninite :
1 -Am. Min. Crystal Structure Database
2 -Athena
3 - EUROmin Project
4 -Google Images
5 -Google Scholar
6 -Handbook of Mineralogy (UofA)
7 -MinDAT
8 -MinMax(Deutsch)
9 -MinMax(English)
10 -Mineralienatlas (Deutsch)
11 -QUT Mineral Atlas
12 - WWW-MINCRYST
13 -École des Mines de Paris
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Villamaninite
(Cu,Ni,Co,Fe)S2
Dana No: 2.12.1.6 Strunz No: II/D.17-20
Locality:
Notes:
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