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Minerals - Wardite | TerraCollect

Mineral - Wardite

WarditeNaAl₃(PO₄)₂(OH)₄ · 2H₂O

Chemical Properties

Mineral Class

Phosphates

Toxicity

none

Formula

NaAl₃(PO₄)₂(OH)₄ · 2H₂O

Unit Cell

a=7.03 c=19.04 Z=4

Physical Properties

Hardness

5

Streak

white

Density

Normal (2-3,5)

Optical Properties

Color

whitegreencolorless

Birefringence

0.010

Luster

Vitreous

Transparency

translucent,

transparent

Pleochroism

Geomineralogical Properties

Crystal System

tetragonal

Composition

Elements

Mass

P₂O₅

35.12

Al₂O₃

38.70

FeO

0.26

MgO

0.21

Na₂O

7.51

K₂O

0.16

H₂O

17.88

New Hampshire (Palache et al. 1952)

Cleavage

Perfect after {001}

Fracture

Tenacity

Brittle

Point Group

tetragonal-trapezohedral - 422

Space Group

P41212 (92)

Habit

dipyramidal, Octahedron, tabular

Formation

Secondary, in granitic phosphate pegmatites through hydrothermal alteration of amblygonite-montebrasite during the late stage of crystallization

Paragenesis

Twinning

Rarity

Rarely

Synonyms

Wardite

Groups and Members

Wardite-Group