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Minerals - Berzeliite | TerraCollect

Mineral - Berzeliite

Berzeliite(NaCa₂)Mg₂(AsO₄)₃

Chemical Properties

Mineral Class

Arsenates

Toxicity

middle

Formula

(NaCa₂)Mg₂(AsO₄)₃

Unit Cell

a=12.36 Z=8

Physical Properties

Hardness

4.5 - 5

Streak

whiteyellowyellow white

Optical Properties

Color

brownorangeyellow

Birefringence

Luster

Vitreous,

Greasy,

Resinous

Transparency

translucent,

transparent

Pleochroism

Geomineralogical Properties

Crystal System

Composition

Elements

Mass

P₂O₅

1.23

As₂O₅

56.72

V₂O₅

0.23

SiO₂

0.66

FeO

0.01

MnO

2.83

PbO

0.35

Karten-Ebenen

Geologische KarteSatelliten Karte

Density

Heavy (3,5-6)

Cleavage

Fracture

conchoidal,

uneven

Tenacity

Brittle

isometric

Point Group

hexoctahedral - 4/m 3 2/m

Space Group

Ia3d (230)

Habit

coarse, massive

Formation

In metasomatically altered manganese-iron deposits

Paragenesis

Twinning

Rarity

Rarely

Synonyms

Berzeliite

MgO

13.60

CaO

19.27

Na₂O

4.56

K₂O

0.08

H₂O

0.71

Sweden (Palache et al.1952)

Groups and Members

Garnet-Supergroup

Berzeliite-Group