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Minerals - Hübnerite | TerraCollect

Mineral - Hübnerite

HübneriteMn²⁺WO₄

Chemical Properties

Mineral Class

Tungstate

Toxicity

none

Formula

Mn²⁺WO₄

Unit Cell

a=4.83 b=5.75 c=4.99 β=91° Z=2

Physical Properties

Hardness

4 - 4.5

Streak

brownredred brown

Optical Properties

Color

blackbrownred

Birefringence

0.130

Luster

Metallic

Transparency

translucent,

transparent

Pleochroism

X = Rot Y = Rot-Gelb Z = Rot-Grün

Geomineralogical Properties

Crystal System

monoclinic

Composition

Elements

Mass

SiO₂

0.62

WO₃

75.58

(Nb,Ta)O₅

0.05

FeO

0.24

MnO

23.40

CaO

0.13

Colorado (Palache et al. 1951)

Groups and Members

Columbite-Supergroup

Wolframite-Group

Karten-Ebenen

Geologische KarteSatelliten Karte

Density

Very Heavy (>6)

Cleavage

Perfect after {010}

Fracture

uneven

Tenacity

Brittle

Point Group

monoclinic-prismatic - 2/m

Space Group

P2/c (13)

Habit

prismatic, tabular

Formation

In veins of hydrothermal ore deposits

Paragenesis

Twinning

Contact twins after {100}

Rarity

Rather rare

Synonyms

Hübnerite, Hubnerite