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Minerals - Wulffite | TerraCollect

Mineral - Wulffite

WulffiteK₃NaCu₄O₂(SO₄)₄

Chemical Properties

Mineral Class

Sulphates

Toxicity

none

Formula

K₃NaCu₄O₂(SO₄)₄

Unit Cell

a=14,28 b=4,95 c=24,11 Z=4

Physical Properties

Hardness

2.5

Streak

green

Density

Normal (2-3,5)

Optical Properties

Color

green

Birefringence

0,133

Luster

Vitreous

Transparency

translucent,

transparent

Pleochroism

Geomineralogical Properties

Crystal System

orthorhombic

Point Group

Composition

Elements

Mass

Na₂O

4,1

K₂O

16,5

Rb₂O

1,0

Cs₂O

0,7

CuO

38,9

ZnO

0,2

SO₃

39,1

Russland

Cleavage

Perfekt, parallel zu (010) und zur c-Achse

Fracture

hooked

Tenacity

Brittle

Space Group

Habit

coarse, crusty, massive, tabular

Formation

Sublimation an vulkanischen Fumarolen

Paragenesis

Twinning

Rarity

Rare

Synonyms

Wulffite