VIVIANITE


Meaning of VIVIANITE in English

General Information:

Chemical Formula:

Fe++3(PO4)2·8(H2O)

Composition:

(Molecular Weight = 501.61 gm)

Iron 33.40 % Fe

Phosphorus 12.35 % P

Hydrogen 3.22 % H

Oxygen 51.03 % O

Empirical Formula:

Fe3+3(PO4)2·8(H2O)

Environment:

Common secondary mineral in the gossan of metallic ore deposits, pegmatates, sedimentary authigenic mineralization in association with organic materials.

IMA Status:

IMA Approved

Name Origin:

Named after the English mineralogist, J. G. Vivian.

Physical Properties:

Cleavage:

[010] Perfect

Color:

colorless, green, blue, dark green, or dark bluish green.

Density:

2.6 - 2.7, Average = 2.65

Diaphaniety:

Transparent to translucent to opaque

Habits:

Divergent - Crystals radiate from a center without producing stellar forms., Concretionary - Rounded massive fine-grained materials., Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).

Hardness:

1.5-2 - Talc-Gypsum

Luminescence:

None.

Luster:

Vitreous - Pearly

Streak:

bluish white

More details...

Mineralogy database English vocab.      Английский словарь базы данных минералогии .