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Minerals - Fluorluanshiweiite | TerraCollect

Mineral - Fluorluanshiweiite

FluorluanshiweiiteKLiAl₁,5(Si₃,5Al₀,5)O₁₀F₂

Chemical Properties

Mineral Class

Silicates

Toxicity

none

Formula

KLiAl₁,5(Si₃,5Al₀,5)O₁₀F₂

Unit Cell

a=5.20 b=8.99 c=10.13 β=101° Z=2

Physical Properties

Hardness

3

Streak

white

Density

Normal (2-3,5)

Optical Properties

Color

graypinkviolet

Birefringence

0.029

Luster

Silky,

Pearly

Transparency

translucent,

transparent

Pleochroism

Geomineralogical Properties

Crystal System

monoclinic

Composition

Elements

Mass

K₂O

9.87

Rb₂O

2.86

Cs₂O

0.86

Na₂O

0.26

FeO

0.26

MnO

0.43

Al₂O₃

23.65

Karten-Ebenen

Geologische KarteSatelliten Karte

Cleavage

Perfect after {001}

Fracture

smooth

Tenacity

Elastic-flexible

Point Group

monoclinic-prismatic - 2/m

Space Group

C2/m (12)

Habit

leafy, tabular

Formation

Magmatic in Li-pegmatites

Paragenesis

Twinning

Rarity

Rare

Synonyms

Fluorluanshiweiite

SiO₂

52.42

F

9.35

Li₂O

3.85

China (Qu et al. 2020)

Groups and Members

Mica-Supergroup

Lepidolite-Group