Loading data...

Impressum Privacy Policy

© 2026 TerraCollect

0.2.41

Minerals - Erythrite | TerraCollect

Mineral - Erythrite

ErythriteCo₃[AsO₄]₂·8H₂O

Chemical Properties

Mineral Class

Arsenates

Toxicity

middle

Formula

Co₃[AsO₄]₂·8H₂O

Unit Cell

a=10.25 b=13.45 c=4.76 β=105° Z=2

Physical Properties

Hardness

2 - 2.5

Streak

pink

Density

Normal (2-3,5)

Optical Properties

Color

red

Birefringence

0.073

Luster

Vitreous,

Pearly

Transparency

translucent,

transparent

Pleochroism

X: Rosa Y: Violett Z: Rot

Geomineralogical Properties

Crystal System

monoclinic

Point Group

Composition

Elements

Mass

As₂O₅

38.30

FeO

4.01

CoO

33.42

H₂O

24.08

Germany (Palache et al. 1952)

Groups and Members

Vivianite-Group

Karten-Ebenen

Geologische KarteSatelliten Karte

Cleavage

Perfect after {010}

Fracture

uneven

Tenacity

Elastic-flexible

monoclinic-prismatic - 2/m

Space Group

C2/m (12)

Habit

tufty, acicular, prismatic, tabular

Formation

Oxidation zone of cobalt deposits

Paragenesis

Twinning

Rarity

Rather rare

Synonyms

Erythrite