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Minerals - Kuzmenkoite-(Mn) | TerraCollect

Mineral - Kuzmenkoite-(Mn)

Kuzmenkoite-(Mn)K₂Mn²⁺(Ti,Nb)₄(Si₄O₁₂)₂(OH,O)₄ · 5-6H₂O

Chemical Properties

Mineral Class

Silicates

Toxicity

none

Formula

K₂Mn²⁺(Ti,Nb)₄(Si₄O₁₂)₂(OH,O)₄ · 5-6H₂O

Unit Cell

a=14,37 b=13,91 c=7,81 β=117,1° Z=1

Physical Properties

Hardness

5

Streak

white

Density

Normal (2-3,5)

Optical Properties

Color

brownorangeyellow

Birefringence

0,092

Luster

Vitreous

Transparency

translucent,

transparent

Pleochroism

Geomineralogical Properties

Crystal System

monoclinic

Composition

Elements

Mass

SiO₂

43,61

TiO₂

25,78

Nb₂O₅

4,82

FeO

1,18

MnO

4,06

MgO

0,31

BaO

1,17

Cleavage

Undeutlich

Fracture

uneven

Tenacity

Brittle

Point Group

Space Group

Habit

prismatic

Formation

Eine späte hydrothermale Bildung in winzigen Hohlräumen in albitisierten Nephelin-Syeniten

Paragenesis

Twinning

Rarity

Very rare

Synonyms

Kuzmenkoite-(Mn)

Na₂O

0,64

K₂O

7,33

H₂O

10,93

Russland

Groups and Members

Kuzmenkoit-Gruppe