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Minerals - Analcime | TerraCollect

Mineral - Analcime

AnalcimeNa[AlSi₂O₆]·H₂O

Links

Chemical Properties

Mineral Class

Silicates

Toxicity

none

Formula

Na[AlSi₂O₆]·H₂O

Unit Cell

a=13.73 Z=16

Physical Properties

Hardness

5 - 5.5

Streak

white

Density

Normal (2-3,5)

Optical Properties

Color

whitegrayredorangecolorless

Birefringence

0.001

Luster

Vitreous

Transparency

translucent,

transparent

Pleochroism

Geomineralogical Properties

Crystal System

Composition

Elements

Mass

SiO₂

54.19

Al₂O₃

23.12

MgO

0.10

CaO

1.54

Na₂O

11.08

K₂O

1.62

H₂O

8.20

Italy (Dana 1892)

Map-Layer

Geological MapSatellite Map

Name and first discovery : Named after the Greek word "analkimos" which means "weak", in reference to the weak electrical charge when heated (pyroelectric effect).

Abbreviation : Annex

literature

Dana, J. D., & Dana, E. S. (1892). The system of mineralogy of James Dwight Dana, 1837-1868: descriptive mineralogy . J. Wiley & sons.

Cleavage

Indistinct after {100}

Fracture

uneven

Tenacity

Brittle

triclinic

Point Group

triclinic-pedial - 1

Space Group

P1 (1)

Habit

Deltoidal icositetrahedron

Formation

(1) Primarily magmatic, formed by crystallization from silica-poor, sodium-rich alkaline magmas (often in phonolites or basalts) in the late magmatic to hydrothermal stage. (2) Hydrothermal, formed as fracture and geode filling in magmatic rocks by deposition from low-temperature (usually < 200 °C) solutions.

Paragenesis

Twinning

Polysynthetic twins on (001) and (110)

Rarity

Common

Synonyms

Analcime, Analcite, Analcidite, Analcine, Analzime, Cubicite, Cubizite, Cuboite, Eudnophite, Euthallite

Varieties

Cäsium-Analcim, Cluthalit, Germanium-Analcim

Groups and Members

Zeolith-Supergroup

ANA-Zeolite-Subgroup