Villamaninite Mineral Data

Villamaninite Mineral Data +

General Villamaninite Information

Chemical Formula:

(Cu,Ni,Co,Fe)S2

Composition:

Molecular Weight = 114.68 gm

Iron 0.24 % Fe

Cobalt 0.77 % Co

Copper 27.71 % Cu

Nickel 15.35 % Ni

Sulfur 55.92 % S

______

100.00 %

Empirical Formula:

Cu_0.5Ni_0.3Co_0.015Fe²⁺_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.

Villamaninite Image

Images:

Villamaninite

Comments: Dull black villamaninite masses in dolomitic rock.
Location: Villamanin, Carmenes District, Castilla y Leon, Spain. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Villamaninite Crystallography

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

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

By Intensity(I/I_o): 2.852(1), 1.717(0.4), 2.548(0.3),

Crystal Structure:

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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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S - Stereo Pair on/off
H - Help Screen
I - Data Info
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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]

Physical Properties of Villamaninite

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

Optical Properties of Villamaninite

RL Color:

Light blue-gray to violet gray.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Villamaninite in Air**
λ	R	∑ R(λ)
400 nm	26.90
420 nm	26.70
440 nm	26.50
460 nm	25.80
480 nm	25.10
500 nm	24.50
520 nm	23.80
540 nm	23.40
560 nm	23.20
580 nm	23.40
600 nm	23.90
620 nm	24.80
640 nm	26.00
660 nm	27.60
680 nm	29.40
700 nm	31.40

**Calculated Relative Intensity Colors of Villamaninite in Air**
Relative Intensity	0%	40%	80%	100%	120%	160%	200%	240%	280%	320%	360%	370%
R

Calculated Properties of Villamaninite

Electron Density:

r_electron=3.97 gm/cc
note: r_{Villamaninite}=4.11 gm/cc.

Fermion Index

Fermion Index = 0.00598
Boson Index = 0.99402

Photoelectric:

PE_{Villamaninite}= 21.62 barns/electron
U=PE_{Villamaninite} x r_electron= 85.91 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Villamaninite is Not Radioactive

Villamaninite Classification

Dana Class:

2.12.1.6 (2)Sulfides - Including Selenides and Tellurides

(2.12)where Am Bn Xp, with (m+n):p=1:2

(2.12.1)Pyrite Group (Isometric: Pa3)

2.12.1.1 Pyrite FeS2 P a3 2/m 3

2.12.1.2 Vaesite NiS2 P a3 2/m 3

2.12.1.3 Cattierite CoS2 P a3 2/m 3

2.12.1.4 Penroseite (Ni,Co,Cu)Se2 P a3 2/m 3

2.12.1.5 Trogtalite CoSe2 P a3 2/m 3

2.12.1.6 Villamaninite (Cu,Ni,Co,Fe)S2 P a3 2/m 3

2.12.1.7 Fukuchilite Cu3FeS8 P a3 2/m 3

2.12.1.8 Krutaite CuSe2 P a3 2/m 3

2.12.1.9 Hauerite MnS2 P a3 2/m 3

2.12.1.10 Laurite RuS2 P a3 2/m 3

2.12.1.11 Aurostibite AuSb2 P a3 2/m 3

2.12.1.12 Krutovite NiAs2 P a3 2/m 3

2.12.1.13 Sperrylite PtAs2 P a3 2/m 3

2.12.1.14 Geversite Pt(Sb,Bi)2 P a3 2/m 3

2.12.1.15 Insizwaite Pt(Bi,Sb)2 P a3 2/m 3

2.12.1.16 Erlichmanite OsS2 P a3 2/m 3

2.12.1.17 Dzharkenite FeSe2 P a3 2/m 3

2.12.1.18 Gaotaiite Ir3Te8 P a3 2/m 3

2.12.1.19 Mayingite IrBiTe P a3 2/m 3

Strunz Class:

II/D.17-20 II - Sulfides and sulphosalts

II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold

II/D.17 - Pyrite group and related compounds, Fukuchilite - Micherenite

II/D.17-10 Fukuchilite Cu3FeS8 P a3 2/m 3

II/D.17-20 Villamaninite (Cu,Ni,Co,Fe)S2 P a3 2/m 3

II/D.17-30 Pyrite FeS2 P a3 2/m 3

II/D.17-40 Cattierite CoS2 P a3 2/m 3

II/D.17-50 Vaesite NiS2 P a3 2/m 3

II/D.17-60 Hauerite MnS2 P a3 2/m 3

II/D.17-65 Dzharkenite FeSe2 P a3 2/m 3

II/D.17-70 Krutaite CuSe2 P a3 2/m 3

II/D.17-80 Trogtalite CoSe2 P a3 2/m 3

II/D.17-90 Penroseite (Ni,Co,Cu)Se2 P a3 2/m 3

II/D.17-100 Laurite RuS2 P a3 2/m 3

II/D.17-110 Erlichmanite OsS2 P a3 2/m 3

II/D.17-120 Sperrylite PtAs2 P a3 2/m 3

II/D.17-130 Aurostibite AuSb2 P a3 2/m 3

II/D.17-140 Geversite Pt(Sb,Bi)2 P a3 2/m 3

II/D.17-150 Insizwaite Pt(Bi,Sb)2 P a3 2/m 3

II/D.17-153 Changchengite! IrBiS P 2₁3 2 3

II/D.17-155 Mayingite IrBiTe P a3 2/m 3

II/D.17-160 Maslovite PtBiTe P 2₁3 2 3

II/D.17-170 Testibiopalladite PdTe(Sb,Te) P 2₁3 2 3

II/D.17-175 Padmaite PdBiSe P 2₁3 2 3

II/D.17-180 Michenerite (Pd,Pt)BiTe P 2₁3 2 3

Other Villamaninite Information

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: