Meaning of ALSTONITE in English

ALSTONITE

General Information:

Chemical Formula:

BaCa(CO3)2

Composition:

(Molecular Weight = 297.42 gm)

Barium 46.17 % Ba

Calcium 13.48 % Ca

Carbon 8.08 % C

Oxygen 32.28 % O

Empirical Formula:

BaCa(CO3)2

Environment:

Low-temperature hydrothermal deposits. See other trimorphs paralstonite and barytocalcite.

Locality:

Brownley Hill lead mine, Alston, Cumberland and Fallowfield lead mine hear Hexham, Northcumberland, England.

Name Origin:

Named after the locality.

Physical Properties:

Cleavage:

[110] Imperfect

Color:

colorless, gray, white, or pink.

Density:

3.69 - 3.71, Average = 3.7

Diaphaniety:

Transparent to translucent

Habits:

Euhedral Crystals - Occurs as well-formed crystals showing good external form., Pseudo Hexagonal - Crystals show a hexagonal outline.,

Hardness:

4-4.5 - Between Fluorite and Apatite

Luminescence:

Fluorescent, Long UV=weak yellow.

Luster:

Vitreous (Glassy)

Streak:

white

More details...

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