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Minerals - Bavenite | TerraCollect

Mineral - Bavenite

BaveniteCa₄Be₂Al₂Si₉O₂₆(OH)₂

Chemical Properties

Mineral Class

Silicates

Toxicity

none

Formula

Ca₄Be₂Al₂Si₉O₂₆(OH)₂

Unit Cell

a=19.39 b=23.19 c=5.01 Z=4

Physical Properties

Hardness

5.5 - 6

Streak

white

Density

Normal (2-3,5)

Optical Properties

Color

whitecolorless

Birefringence

0.007

Luster

Vitreous,

Silky

Transparency

translucent,

transparent

Pleochroism

Geomineralogical Properties

Crystal System

orthorhombic

Composition

Elements

Mass

SiO₂

57.64

Al₂O₃

6.46

BeO

7.66

CaO

23.96

H₂O

3.88

California (Artini 1901)

Karten-Ebenen

Geologische KarteSatelliten Karte

Name and first discovery: Named after the type locality, near the town of Baveno in Italy. First described in 1901.

Chemism:

Synonyms: Plinite

Varieties:

Abbreviation: Bvn

Literature

Artini, E. (1901). Diuna nuova specie minerale trovata nel granito di Baveno. Rome R. accad. d. Lincei.

Cleavage

Perfect after {001}, distinct after {100}

Fracture

Tenacity

Brittle

Point Group

orthorhombic-pyramidal - mm2

Space Group

Ama2 (40)

Habit

leafy, book-shaped, coarse, acicular, radial, tabular

Formation

Secondary in pegmatites from the alteration of primary beryllium minerals, such as beryl; through metasomatism in skarns

Paragenesis

Twinning

Twins after {100}

Rarity

Rather rare

Synonyms

Bavenite