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Minerals - Kostylevite | TerraCollect

Mineral - Kostylevite

KostyleviteK₂Zr(Si₃O₉) · H₂O

Chemical Properties

Mineral Class

Silicates

Toxicity

none

Formula

K₂Zr(Si₃O₉) · H₂O

Unit Cell

a=13,17 b=11,72 c=6,57 β=105° Z=2

Physical Properties

Hardness

5

Streak

white

Density

Normal (2-3,5)

Optical Properties

Color

whitecolorless

Birefringence

0,015

Luster

Vitreous

Transparency

translucent,

transparent

Pleochroism

Geomineralogical Properties

Crystal System

monoclinic

Composition

Elements

Mass

SiO₂

42,0

TiO₂

2,1

ZrO₂

24,0

HfO₂

0,6

Fe₂O₃

0,02

CaO

0,01

Na₂O

0,01

Cleavage

perfekt nach {100}

Fracture

nd

Tenacity

Brittle

Point Group

Space Group

Habit

prismatic, tabular

Formation

In Alkalipegmatiten

Paragenesis

Twinning

Nach (100)

Rarity

Rare

Synonyms

Kostylevite

K₂O

22,1

H₂O

4,3

Russland