Vuagnatite (original) (raw)

A valid IMA mineral species

About VuagnatiteHide

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Colour:

Colourless, light blue, tan

Crystal System:

Orthorhombic

Name:

Named in honor of Prof Dr. Marc Bernard Vuagnat (30 January 1922 - 23 March 2015), professor of geology, University of Geneva, Switzerland, "in recognition of his work spanning some twenty-five years in the field of ophiolites".

This page provides mineralogical data about Vuagnatite.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:4212:9

89d4640c-7468-42e4-8f8d-04d3eb87866b

IMA Classification of VuagnatiteHide

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Type description reference:

Classification of VuagnatiteHide

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9.AG.60

9 : SILICATES (Germanates)
A : Nesosilicates
G : Nesosilicates with additional anions; cations in > [6] +- [6] coordination

52.4.2.2

52 : NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
4 : Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination

16.9.7

16 : Silicates Containing Aluminum and other Metals
9 : Aluminosilicates of Ca

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 VuagnatiteHide

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Colour:

Colourless, light blue, tan

Density:

3.42(2) g/cm3 (Measured) 3.41 g/cm3 (Calculated)

Optical Data of VuagnatiteHide

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RI values:

_n_α = 1.701(2) _n_β = 1.724(2) _n_γ = 1.727(2)

2V:

Measured: 44° (1), Calculated: 46°

δ = 0.026

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

Dispersion:

Strong to very strong, r < v.

Optical Extinction:

X = c; Y = b; Z = a.

Comments:

X = colorless or yellowish brown; Y = Z = colorless.

Comments:

Absorption: X >> Y = Z.

Chemistry of VuagnatiteHide

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Mindat Formula:

CaAl(SiO4)(OH)

Crystallography of VuagnatiteHide

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Crystal System:

Orthorhombic

Class (H-M):

222 - Disphenoidal

Cell Parameters:

a = 7.0538(4) Å, b = 8.5410(4) Å, c = 5.6839(3) Å

Ratio:

a:b:c = 0.826 : 1 : 0.665

Unit Cell V:

342.44 ų (Calculated from Unit Cell)

Crystallographic forms of VuagnatiteHide

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Crystal Atlas:

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Crystal StructureHide

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ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0000525	Vuagnatite	McNear E, Vincent M G, Parthe E (1976) The crystal structure of vuagnatite, CaAl(OH)SiO4 American Mineralogist 61 831-838		1976	0	293

CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

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Radiation - Copper Kα

Data Set:

Data courtesy of RRUFF project at University of Arizona, used with permission.

Powder Diffraction Data:

Comments:

Red Mountain, California, USA. Data from Pabst et al. (1977).

Geological EnvironmentHide

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Type Occurrence of VuagnatiteHide

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General Appearance of Type Material:

Anhedral and intimately intergrown with other calcium silicates and chlorite. As a replacement of plagioclase. Crystals from 0.03 to 0.5 mm in diameter. Frequently included by clinochlore, vesuvianite and hydrogrossular.

Place of Conservation of Type Material:

Natural History Museum, Geneva, 435/1; University of Geneva, Geneva, Switzerland; National Museum of Natural History, Washington, D.C., USA, 146560.

Geological Setting of Type Material:

In rodingitized pegmatitic anorthositic gabbro dykes, cross-cutting harzburgite-serpentinite from an ophiolitic zone.

Associated Minerals at Type Locality:

Reference:

Sarp, H., Bertrand, J., McNear, E. (1976) Vuagnatite, CaAl(OH)SiO4, a new natural calcium aluminum neosilicate. American Mineralogist: 61: 825-830.

Synonyms of VuagnatiteHide

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Other Language Names for VuagnatiteHide

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Relationship of Vuagnatite to other SpeciesHide

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Other Members of this group:

Structurally related to group(s):

Common AssociatesHide

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Associated Minerals Based on Photo Data:

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 VuagnatiteHide

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References for VuagnatiteHide

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Localities for VuagnatiteHide

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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.