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0.2.41

Minerals - Descloizite | TerraCollect

Mineral - Descloizite

DescloizitePb(Zn,Cu)[OH|VO₄]

Chemical Properties

Mineral Class

Vanadates

Toxicity

none

Formula

Pb(Zn,Cu)[OH|VO₄]

Unit Cell

a=7.59 b=6.06 c=9.42 Z=4

Physical Properties

Hardness

3 - 3.5

Streak

brown

Density

Very Heavy (>6)

Optical Properties

Color

blackbrown

Birefringence

0.165

Luster

Greasy,

Adamantine

Transparency

translucent,

transparent

Pleochroism

X = Y = Gelb-Braun Z = Braun-Schwarz

Geomineralogical Properties

Crystal System

orthorhombic

Composition

Elements

Mass

SiO₂

0.02

V₂O₅

22.76

FeO

0.01

MnO

0.01

CuO

0.56

ZnO

19.21

PbO

55.47

Cleavage

Fracture

uneven

Tenacity

Brittle

Point Group

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

Space Group

Pnma (62)

Habit

leafy, prismatic, tabular

Formation

Oxidation zone of Pb-deposits

Paragenesis

Twinning

Rarity

Rather rare

Synonyms

Descloizite

H₂O

2.19

Namibia (Palache et al. 1952)

Groups and Members

Adelite-Descloizite-Group