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Minerals - Beudantite | TerraCollect

Mineral - Beudantite

BeudantitePbFe₃(AsO₄)(SO₄)(OH)₆

Chemical Properties

Mineral Class

Arsenates

Toxicity

middle

Formula

PbFe₃(AsO₄)(SO₄)(OH)₆

Unit Cell

a=7.34 c=17.04 Z=3

Physical Properties

Hardness

3.5 - 4.5

Streak

yellowgreen

Density

Optical Properties

Color

brownyellowgreen

Birefringence

0.014

Luster

Vitreous,

Resinous

Transparency

translucent,

transparent

Pleochroism

Geomineralogical Properties

Crystal System

Composition

Elements

Mass

SO₃

11.15

As₂O₅

16.02

Fe₂O₃

33.48

CuO

0.22

ZnO

0.11

PbO

31.22

H₂O

7.80

Montana (Palache et al. 1952)

Karten-Ebenen

Geologische KarteSatelliten Karte

Heavy (3,5-6)

Cleavage

Distinct after {0001}

Fracture

Tenacity

Brittle

trigonal

Point Group

ditrigonal-scalenohedral - 3m

Space Group

R3m (166)

Habit

Rhombohedral, tabular

Formation

Oxidation zone of lead deposits

Paragenesis

Twinning

Rarity

Rarely

Synonyms

Beudantite

Groups and Members

Alunite-Supergroup

Beudantite-Group