Meneghinite

Pb13 CuSb7 S24
c 2001-2005 Mineral Data Publishing, version 1

Crystal Data: Orthorhombic. Point Group: 2/m 2/m 2/m.
and striated k [001], to 2 cm. Also massive, fibrous to compact.

Crystals are slender prismatic

Physical Properties:
Cleavage: Perfect but interrupted on {010}; poor on {001}.
Fracture: Conchoidal. Tenacity: Brittle. Hardness = 2.5 VHN = n.d. D(meas.) = 6.36
D(calc.) = 6.35
Optical Properties: Opaque. Color: Blackish lead-gray; white in polished section.
Streak: Shining black. Luster: Bright metallic. Pleochroism: Weak. Anisotropism: Strong.
R1 –R2 : (400) 39.6–46.6, (420) 39.0–46.0, (440) 38.5–45.4, (460) 38.2–44.9, (480) 37.8–44.4, (500)37.5–44.0, (520) 37.2–43.6, (540) 37.0–43.4, (560) 36.9–43.2, (580) 36.7–42.8, (600) 36.3–42.2, (620)
35.9–41.6, (640) 35.4–40.9, (660) 34.9–40.1, (680) 34.4–39.4, (700) 33.7–38.7
Cell Data:
Z=4Space Group: P bnm. a = 11.343–11.369

b = 24.028–24.080

c = 4.126–4.140

X-ray Powder Pattern: Bottino, Italy.
3.274 (10), 2.922 (9), 3.740 (8), 3.489 (6), 4.13 (5), 2.741 (4), 3.080 (3)Chemistry:PbCu

(1)
61.52
1.20(2)
62.44
1.52

(3)
61.51
1.45

SbS

(1)
19.53
17.59

(2)
19.47
17.49

(3)
19.46
17.58

Total 99.84
100.92100.00(1) Bottino, Italy; by electron microprobe, corresponding to Pb12.99 Cu0.83 Sb7.02 S24.00 .
(2) Marmora, Canada; by electron microprobe. corresponding to Pb13.26 Cu1.05 Sb7.04 S24.00 .
(3) Pb13 CuSb7 S24 .
Occurrence: Uncommon, but widespread in hydrothermal veins, also contact metasomatic,
volcanogenic sulfide, Cu–Mo porphyry, and rarely, Kuroko deposits.
Association: Galena, chalcopyrite, sphalerite, bournonite, cubanite, pyrite, pyrrhotite,boulangerite, jamesonite, franckeite, tetrahedrite, gudmundite.
Distribution: In Italy, from Bottino, about two km east of Seravezza, Tuscany [TL]. In
England, at Shallowford Bridge, near South Molton, Devon, and in the Pengenna mine, St.
Kew, the Pentire veins, St. Minver, and the Portquin veins, St. Endellion, Cornwall. From theOchsenkopf, near Schwarzenberg, Saxony; at Goldkronach, in the Fichtelgebirge, Bavaria; andelsewhere in Germany. In the Maronia Cu–Mo deposit, 30 km southeast of Komotini, Greece.
At Bournac, Montagne Noire, Finistère, France. From Hällefors, Sweden. At Aijala, Finland. In
the Dodo mine, about 100 km west-northwest of Saranpaul, Subpolar Ural Mountains, Russia.
At Pun-dung, North Korea. From Pingtoushan, Jiangxi Province, China. At Broken Hill, NewSouth Wales, Australia. In Canada, in Ontario, at Marble Lake; in British Columbia, at theBluebird-Mayflower mine, Trail Creek; and other localities. In the USA, at the Kalkar quarry,Santa Cruz, Santa Cruz Co., California. Many additional minor occurrences are known.
Name:species.

Honors Professor Giuseppi Meneghini (1811–1889) of Pisa, Italy, who first observed theReferences: (1) Palache, C., H. Berman, and C. Frondel (1944) Dana’s system of mineralogy,(7th edition), v. I, 402–404. (2) Jambor, J.L. (1975) Synthetic copper-free meneghinite. Geol.
Survey of Canada Paper 75-1B, 71–72. (3) Hicks, W.D. and E.W. Nuffield (1978) Naturaland synthetic meneghinite. Can. Mineral., 16, 393–395. (4) Euler, R. and E. Hellner (1960)Über komplex zusammengesetzte sulfidische Erze. VI. Zur Kristallstruktur des Meneghinits,CuPb13 Sb7 S24 . Zeits. Krist., 113, 345–372 (in German with English abs.). (5) Moëlo, Y., A.
Meerschaut, P. Palvadeau, and N. Meisser (2002) Structure cristalline d’une ménéghinite naturelle
pauvre en cuivre, Cu0,58 Pb12,72 (Sb7,04 Bi0,24 )S24 (in French with English abs.). Compt. Rendus
Acad. Sci. Paris-Geoscience, 334(8), 529–536. (6) Criddle, A.J. and C.J. Stanley, Eds. (1993)
Quantitative data file for ore minerals, 3rd ed. Chapman & Hall, London, 364.
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