Zincostaurolite (original) (raw)

A valid IMA mineral species

About ZincostauroliteHide

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Zn may be replaced by Li, Fe2+, Mg.

Lustre:

Vitreous, Resinous

Specific Gravity:

3.78 (Calculated)

Crystal System:

Monoclinic

Name:

Named as the zinc analogue of Staurolite. Submitted to the CNMMN in 1992, but was first formally described as a new mineral species in 2003.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:27027:0

1fe4bb49-cfaf-4da6-aed9-b09f7889e7df

IMA Classification of ZincostauroliteHide

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Type description reference:

Classification of ZincostauroliteHide

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9.AF.30

9 : SILICATES (Germanates)
A : Nesosilicates
F : Nesosilicates with additional anions; cations in [4], [5] and/or only [6] coordination

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Physical Properties of ZincostauroliteHide

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Density:

3.78 g/cm3 (Calculated)

Optical Data of ZincostauroliteHide

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RI values:

_n_α = 1.722 _n_γ = 1.734

δ = 0.012

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Pleochroism:

Non-pleochroic

Chemistry of ZincostauroliteHide

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Mindat Formula:

Zn2Al9Si4O23(OH)

Zn may be replaced by Li, Fe2+, Mg.

Crystallography of ZincostauroliteHide

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Crystal System:

Monoclinic

Class (H-M):

2/m - Prismatic

Cell Parameters:

a = 7.853 Å, b = 16.534 Å, c = 5.639 Å
β = 90(5)°

Ratio:

a:b:c = 0.475 : 1 : 0.341

Unit Cell V:

732.18 ų (Calculated from Unit Cell)

Morphology:

zoned prismatic crystals to 3 mm.

Crystal StructureHide

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X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Comments:

Calculated pattern.

Geological EnvironmentHide

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Type Occurrence of ZincostauroliteHide

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General Appearance of Type Material:

Prismatic crystals up to 3 mm long.

Place of Conservation of Type Material:

School of Mines, Paris, France, no. 56245.

Geological Setting of Type Material:

A karst-filling metabauxite pocket of Mesozoic cover (Barrhorn series) of the Sivie-Mischabel nappe. A breakdown of

gahnite

,

pyrophyllite

and

diaspore

.

Associated Minerals at Type Locality:

Reference:

Chopin, C., Goffé, B., Ungaretti, L., Oberti, R. (2003) Magnesiostaurolite and zincostaurolite: mineral description with a petrogenetic and crystal-chemical update. European Journal of Mineralogy: 15: 167-176.

Synonyms of ZincostauroliteHide

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Other Language Names for ZincostauroliteHide

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Relationship of Zincostaurolite to other SpeciesHide

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Other Members of this group:

Related Minerals - Strunz-mindat GroupingHide

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Other InformationHide

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Health Risks:

No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for ZincostauroliteHide

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References for ZincostauroliteHide

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Localities for ZincostauroliteHide

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This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.