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Minerals - Carletonite | TerraCollect

Mineral - Carletonite

CarletoniteKNa₄Ca₄Si₈O₁₈(CO₃)₄(OH,F)·H₂O

Chemical Properties

Mineral Class

Silicates

Toxicity

none

Formula

KNa₄Ca₄Si₈O₁₈(CO₃)₄(OH,F)·H₂O

Unit Cell

a=13.18 c=16.70 Z=4

Physical Properties

Hardness

4 - 4.5

Streak

white

Density

Normal (2-3,5)

Optical Properties

Color

bluepinkcolorless

Birefringence

0.004

Luster

Vitreous,

Pearly

Transparency

translucent,

transparent

Pleochroism

Geomineralogical Properties

Crystal System

tetragonal

Composition

Elements

Mass

SiO₂

44.90

TiO₂

0.01

Al₂O₃

0.50

MgO

0.09

CaO

19.92

Na₂O

10.23

K₂O

3.28

Karten-Ebenen

Geologische KarteSatelliten Karte

Cleavage

Perfect after {001}, distinct after {110}

Fracture

conchoidal

Tenacity

Brittle

Point Group

ditetragonal-dipyramidal - 4/m 2/m 2/m

Space Group

P4/mbm (127)

Habit

blocky, coarse, prismatic, tabular

Formation

Magmatisch

Paragenesis

Twinning

Rarity

Rather rare

Synonyms

Carletonite

F

0.70

H₂O

4.21

CO₂

19.92

Canada (Chao 1971)