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Minerals - Volborthite | TerraCollect

Mineral - Volborthite

VolborthiteCu₃(V₂O₇)(OH)₂ · 2H₂O

Chemical Properties

Mineral Class

Vanadates

Toxicity

none

Formula

Cu₃(V₂O₇)(OH)₂ · 2H₂O

Unit Cell

a=10,61 b=5,87 c=7,21 β=95° Z=2

Physical Properties

Hardness

3.5

Streak

green

Density

Normal (2-3,5)

Optical Properties

Color

yellowgreen

Birefringence

0,023

Luster

Vitreous,

Greasy,

Pearly,

Waxy

Transparency

translucent,

opaque

Pleochroism

Geomineralogical Properties

Crystal System

monoclinic

Composition

Elements

Mass

V₂O₅

36,7

SiO₂

1,4

V₂O₃

1,7

CuO

48,8

H₂O

11,5

Italien

Groups and Members

Volborthit-Gruppe

Cleavage

Eine, perfekt

Fracture

uneven

Tenacity

Brittle

Point Group

Space Group

Habit

leafy, coarse, crusty, spherical, massive, rosette, tabular

Formation

Sekundär, in der Oxidationszone von Vanadiumlagerstätten

Paragenesis

Twinning

Rarity

Rather rare

Synonyms

Volborthite