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Minerals - Bornite | TerraCollect

Mineral - Bornite

BorniteCu₅FeS₄

Chemical Properties

Mineral Class

Sulfides and sulfosalts

Toxicity

none

Formula

Cu₅FeS₄

Unit Cell

a=10.95 b=21.86 c=10.95 Z=16

Physical Properties

Hardness

3 - 3.5

Streak

blackgraygray black

Optical Properties

Color

brown

Birefringence

Luster

Metallic

Transparency

opaque

Pleochroism

Geomineralogical Properties

Crystal System

orthorhombic

Point Group

Composition

Elements

Mass

Cu

62.99

Pb

0.10

Fe

11.23

S

25.58

USA (Palache et al. 1952)

Karten-Ebenen

Geologische KarteSatelliten Karte

Density

Heavy (3,5-6)

Cleavage

Indistinct

Fracture

uneven

Tenacity

Brittle

orthorhombic-dipyramidal - 2/m 2/m 2/m

Space Group

Pbca (61)

Habit

coarse, Octahedron

Formation

In hydrothermal ore deposits; In the enrichment zone of supergene deposits; Secondary from Chalcopyrite

Paragenesis

Twinning

Penetration twins after {111]

Rarity

Common

Synonyms

Bornite