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Minerals - Bournonite | TerraCollect

Mineral - Bournonite

BournonitePbCu[SbS₃]

Chemical Properties

Mineral Class

Sulfides and sulfosalts

Toxicity

low

Formula

PbCu[SbS₃]

Unit Cell

a=8.15 b=8.69 c=7.79 Z=4

Physical Properties

Hardness

2.5 - 3

Streak

gray

Density

Heavy (3,5-6)

Optical Properties

Color

blackgray

Birefringence

Luster

Metallic

Transparency

opaque

Pleochroism

Geomineralogical Properties

Crystal System

orthorhombic

Point Group

Composition

Elements

Mass

Pb

42.34

Cu

12.80

Zn

0.04

Fe

0.27

Sb

24.44

S

19.58

Romania (Palache et al. 1952)

Groups and Members

Bournonite-Group

Karten-Ebenen

Geologische KarteSatelliten Karte

Cleavage

Imperfect after {010}, indistinct after {100} und {001}

Fracture

conchoidal,

uneven

Tenacity

Brittle

orthorhombic-pyramidal - mm2

Space Group

Pmn21 (31)

Habit

prismatic, tabular

Formation

In hydrothermal ore deposits

Paragenesis

Twinning

Wheel-shaped rotational twins after {110}

Rarity

Common

Synonyms

Bournonite