Meneghinite

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Meneghinite
Meneghinite-113674.jpg
Meneghinite twin, 1.1 x 0.4 x 0.2 cm. Bottino Mine, Stazzema, Italy
General
Category Sulfosalt mineral
Formula
(repeating unit)
CuPb13 Sb7S24
Strunz classification 2.HB.05b
Crystal system Orthorhombic
Crystal class Dipyramidal (mmm)
H-M symbol: (2/m 2/m 2/m)
Space group Pbnm
Identification
Color Blackish lead-grey
Crystal habit Prismatic to acicular, massive
Cleavage {010} perfect
Fracture Conchoidal
Tenacity Brittle
Mohs scale hardness
Luster Metallic
Streak Black shining
Diaphaneity Opaque
Specific gravity 6.36
Pleochroism Weak
References [1][2][3]

Meneghinite is a sulfosalt mineral with the chemical formula CuPb13 Sb7S24.[3]

In the orthorhombic crystal system, meneghinite has a Mohs hardness of 2½, one perfect cleavage and a conchoidal fracture. It is a blackish lead-grey in colour and gives a black shining streak. Its lustre is metallic.[3]

Discovered in the Italian Province of Lucca in 1852,[3] it is named after Giuseppe Meneghini (1811–1889) of the University of Pisa, who first observed the species.[4] The Bottino Mine in Lucca is the type locality.[3]

Sample of Meneghinite from the Harvard Museum of Natural History

References[edit]

  1. ^ Mineralienatlas
  2. ^ http://rruff.geo.arizona.edu/doclib/hom/meneghinite.pdf Handbook of Mineralogy
  3. ^ a b c d e Mindat information page for Meneghinite
  4. ^ The Brown Reference Group plc, ed. (2007). "Meneghinite". Treasures of the Earth. De Agostini UK Ltd. ISBN 0-7489-7995-6.