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Minerals - Eosphorite | TerraCollect

Mineral - Eosphorite

EosphoriteMn²⁺Al[(OH)₂|PO₄]·H₂O

Chemical Properties

Mineral Class

Phosphates

Toxicity

none

Formula

Mn²⁺Al[(OH)₂|PO₄]·H₂O

Unit Cell

a=10.46 b=13.50 c=6.93 Z=8

Physical Properties

Hardness

5

Streak

white

Density

Normal (2-3,5)

Optical Properties

Color

brownredcolorless

Birefringence

0.035

Luster

Vitreous,

Greasy

Transparency

translucent,

transparent

Pleochroism

X: Braun-Gelb Y: Rosa Z: Rosa-Farblos

Geomineralogical Properties

Crystal System

Composition

Elements

Mass

P₂O₅

29.89

Al₂O₃

22.37

FeO

1.38

MnO

29.94

H₂O

15.34

USA (Palache et al. 1952)

Karten-Ebenen

Geologische KarteSatelliten Karte

Cleavage

Indistinct after {100}

Fracture

uneven

Tenacity

Brittle

orthorhombic

Point Group

orthorhombic-dipyramidal - 2/m 2/m 2/m

Space Group

Cmce (64)

Habit

acicular, prismatic, prismatic, tabular

Formation

Pegmatites (Phosphate-rich)

Paragenesis

Twinning

Rarity

Rather rare

Synonyms

Eosphorite