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Minerals - Roweite | TerraCollect

Mineral - Roweite

RoweiteCa₂Mn²⁺₂B₄O₇(OH)₆

Chemical Properties

Mineral Class

Borates

Toxicity

none

Formula

Ca₂Mn²⁺₂B₄O₇(OH)₆

Unit Cell

a=8.28 b=13.36 c=9.06 Z=4

Physical Properties

Hardness

5

Streak

whitebrownbrown white

Optical Properties

Color

brown

Birefringence

0.015

Luster

Vitreous

Transparency

translucent,

transparent

Pleochroism

Geomineralogical Properties

Crystal System

orthorhombic

Point Group

Composition

Elements

Mass

B₂O₃

32.40

MnO

28.30

ZnO

3.13

MgO

1.66

CaO

25.40

H₂O

8.51

New Jersey (Palache et al. 1952)

Karten-Ebenen

Geologische KarteSatelliten Karte

Density

Normal (2-3,5)

Cleavage

Imperfect after {100}

Fracture

conchoidal

Tenacity

Brittle

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

Space Group

Pbam (55)

Habit

leafy, rosette, tabular

Formation

Secondarily, through hydrothermal metasomatism in boron-rich, iron-bearing skarn deposits

Paragenesis

Twinning

Rarity

Very rare

Synonyms

Roweite