Martinandresite (original) (raw)

A valid IMA mineral species

About MartinandresiteHide

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Formula:

Ba2(Al4Si12O32) · 10H2O

Crystal System:

Orthorhombic

Name:

Named in honor of Martin Andres (b. 1965), from Glis, Switzerland. He discovered the famous armenite locality of Wasenalp; the type locality of this mineral.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:51985:0

da1783f2-356c-458d-ab7c-bbb8523c46ae

IMA Classification of MartinandresiteHide

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Type description reference:

Chukanov, Nikita V., Zubkova, Natalia V., Meisser, Nicolas, Ansermet, Stefan, Weiss, Stefan, Pekov, Igor V., Belakovskiy, Dmitriy I., Vozchikova, Svetlana A., Britvin, Sergey N., Pushcharovsky, Dmitry Yu. (2018) Martinandresite, Ba2(Al4Si12O32)·10H2O, a new zeolite from Wasenalp, Switzerland. Physics and Chemistry of Minerals, 45 (6) 511-521 doi:10.1007/s00269-017-0938-6

Classification of MartinandresiteHide

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9.GC.10

9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
C : Chains of doubly-connected 4-membered rings

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 MartinandresiteHide

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Transparency:

Transparent, Translucent

Comment:

light green due to microscopic chlorite inclusions

Cleavage:

Poor/Indistinct
Presumably on (010) and in a direction across (010).

Density:

2.482(5) g/cm3 (Measured) 2.495 g/cm3 (Calculated)

Comment:

Measured by floatation in heavy liquids

Optical Data of MartinandresiteHide

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RI values:

_n_α = 1.500(2) _n_β = 1.512(2) _n_γ = 1.515(2)

2V:

Measured: 55° (10), Calculated: 53°

δ = 0.015

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

Pleochroism:

Non-pleochroic

Chemistry of MartinandresiteHide

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Mindat Formula:

Ba2(Al4Si12O32) · 10H2O

Crystallography of MartinandresiteHide

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Crystal System:

Orthorhombic

Class (H-M):

m m m _(_2/_m_2/_m_2/m ) - Dipyramidal

Cell Parameters:

a = 9.4640(4) Å, b = 14.2288(6) Å, c = 6.9940(4) Å

Ratio:

a:b:c = 0.665 : 1 : 0.492

Morphology:

Blocky. Major form is {010}; the subordinate forms are {100} and {001}.

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Comments:

From Type Description.

Geological EnvironmentHide

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Type Occurrence of MartinandresiteHide

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General Appearance of Type Material:

Tan-coloured blocky crystals up to 8 mm, aggregates up to 6 cm across, and cruciform twins up to 3.5 mm.

Place of Conservation of Type Material:

Type material is deposited in the mineralogical collections of the Geological Museum of Lausanne, Switzerland, catalogue number is MGL 093284

Empirical Formula of Type Material:

Na0.17K0.04Ba2.00(Al4.19Si11.81O32)H19.85O9.93

Chemical Analysis of Type Material:

Associated Minerals at Type Locality:

Reference:

Chukanov, N.V., Zubkova, N.V., Meisser, N., Ansermet, S., Weiss, S., Pekov, I.V., Belakovskiy, D.I., Vozchikova, S.A., Britvin, S.N., Pushcharovsky, D.Yu (2017) Martinandresite, Ba2(Al4Si12O32)·10H2O, a new zeolite from Wasenalp, Switzerland. Mineralogy and Petrology: 44: 511–521.

Synonyms of MartinandresiteHide

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Relationship of Martinandresite to other SpeciesHide

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Other Members of this group:

Related Minerals - Strunz-mindat GroupingHide

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Fluorescence of MartinandresiteHide

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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 MartinandresiteHide

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References for MartinandresiteHide

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Reference List:

Chukanov, Nikita V., Zubkova, Natalia V., Meisser, Nicolas, Ansermet, Stefan, Weiss, Stefan, Pekov, Igor V., Belakovskiy, Dmitriy I., Vozchikova, Svetlana A., Britvin, Sergey N., Pushcharovsky, Dmitry Yu. (2018) Martinandresite, Ba2(Al4Si12O32)·10H2O, a new zeolite from Wasenalp, Switzerland. Physics and Chemistry of Minerals, 45 (6) 511-521 doi:10.1007/s00269-017-0938-6

Localities for MartinandresiteHide

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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.