Loading data...

Impressum Privacy Policy

© 2026 TerraCollect

0.2.41

Minerals - Nafertisite | TerraCollect

Mineral - Nafertisite

NafertisiteNa₃Fe²⁺₁₀Ti₂(Si₆O₁₇)₂O₂(OH)₆F(H₂O)₂

Chemical Properties

Mineral Class

Silicates

Toxicity

none

Formula

Na₃Fe²⁺₁₀Ti₂(Si₆O₁₇)₂O₂(OH)₆F(H₂O)₂

Unit Cell

a=5,35 b=16,18 c=21,95 β=95° Z=2

Physical Properties

Hardness

2 - 3

Streak

gold

Density

Normal (2-3,5)

Optical Properties

Color

brownbronze

Birefringence

0,066

Luster

Vitreous,

Silky

Transparency

translucent,

opaque

Pleochroism

Geomineralogical Properties

Crystal System

monoclinic

Composition

Elements

Mass

Na₂O

4,8

K₂O

1,6

MgO

1,3

MnO

0,8

FeO

21,0

Fe₂O₃

14,5

Al₂O₃

1,3

Cleavage

Perfekt nach (010) und (001)

Fracture

fibrous

Tenacity

Brittle

Point Group

Space Group

Habit

coarse, fibrous, massive, acicular, prismatic

Formation

Magmatisch, in alkalischen Pegmatiten

Paragenesis

Twinning

Rarity

Very rare

Synonyms

Nafertisite

TiO₂

8,3

SiO₂

38,9

H₂O

7,9

Grönland