Villamanı́nite(Cu, Ni, Co, Fe)S2
c 2001-2005 Mineral Data Publishing, version 1

Crystal Data: Triclinic, pseudocubic. Point Group: 1 or 1; pseudo 2/m 3. As
pseudocubes, pseudo-octahedra, and pseudocubo-octahedra, with rounded faces, to 5 mm; also as
nodules with radial fibrous structure. Twinning: Noted, but not described.
Physical Properties:
Cleavage: Perfect pseudocubic. Fracture: Uneven. Hardness = 4.5
VHN = 535–710 (spherical aggregates); 440–520 (euhedral crystals) (20 g load).
D(meas.) = 4.4–4.5 D(calc.) = 4.408–4.604
Optical Properties: Opaque. Color: Iron-black; pale blue-gray to violet-gray in reflected light.
Streak: Sooty black. Luster: Dull metallic.
R: (400) 30.1, (420) 29.7, (440) 29.2, (460) 28.7, (480) 28.1, (500) 27.4, (520) 26.8, (540) 26.3,(560) 26.0, (580) 25.9, (600) 26.1, (620) 26.5, (640) 27.2, (660) 28.1, (680) 29.0, (700) 30.1
Cell Data: Space Group: P 1 or P 1. a = 5.7030–5.7087 b = 5.7041–5.7070
c = 5.7051–5.7086 α = 90.0089◦−90.0250◦ β = 90.0091◦−90.0573◦ γ = 90.0112◦−90.0301◦
Z=4X-ray Powder Pattern: Providencia mine, Spain.
2.852 (100), 1.7174 (40), 2.548 (30), 2.325 (25), 2.014 (25), 3.289 (15), 1.0959 (15)Chemistry:
CuNiCoFeSe
S

(1)
24.0
11.8
4.0
5.3
0.06
54.0

(2)
24.1
17.3
5.7
2.2
1.5
50.2

Total 99.2
101.0
(1) Providencia mine, Spain; corresponds to (Cu0.47 Ni0.25 Fe0.12 Co0.08 )Σ=0.92 S2.08 . (2) Do.; byelectron microprobe; corresponds to (Cu0.48 Ni0.37 Co0.12 Fe0.05 )Σ=1.02 (S1.96 Se0.02 )Σ=1.98 .
Occurrence: As subhedral disseminated grains in black bituminous dolostone; in whitecoarse-grained recrystallized dolostone; as nodular aggregates in vuggy dolomite veinlets(Providencia mine, Spain).
Association:

Pyrite, chalcopyrite, dolomite, quartz (Providencia mine, Spain).

Distribution: From the Providencia mine, six km east-northeast of Villamanı́n, Cármenes
district, León Province, Spain [TL]. In Poland, in the Lubin copper mine, near Legnica, Zechsteincopper district, Lower Silesia, and at Karniowice. From Rum Jungle, Alligator River district,
Northern Territory, Australia.
Name:

For the town of Villamanı́n, Spain.

Type Material:

The Natural History Museum, London, England, 1919,309; 1920,7.

References: (1) Schoeller, W.R. and A.R. Powell (1920) Villamaninite, a new mineral.
Mineral. Mag., 19, 14–18. (2) (1920) Amer. Mineral., 5, 168 (abs. ref. 1). (3) Hey, M.H. (1962)
A new analysis of villamaninite. Mineral. Mag., 33, 169–170. (4) Ypma, P.J.M., H.J. Evers,and C.F. Woensdregt (1968) Mineralogy and geology of the Providencia mine (León, Spain),
type-locality of villamaninite. Neues Jahrb. Mineral., Monatsh., 174–191. (5) Moreiras, D., C.
Marcos, A. Panaiagua, M.R. Diaz-Fernandez, and S. Garcia-Granda (1991) Preliminary data
about symmetry and structure of villamaninite. Neues Jahrb. Mineral., Abh., 163, 254–256.
(6) Marcos, ?? (1996) ??title?? Acta Cryst., 899–?? str??; [order-may replace 5??] (7) Bayliss, P.
(1977) X-ray powder data for villamaninite. Mineral. Mag., 41, 545. (8) Criddle, A.J. and C.J.
Stanley, Eds. (1993) Quantitative data file for ore minerals, 3rd ed. Chapman & Hall, London,606.
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