Pleysteinite (original) (raw)

A valid IMA mineral species

About PleysteiniteHide

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Formula:

[(H2O)0.5K0.5]2Mn2Al3(PO4)4F2 · 14H2O

Specific Gravity:

2.34 (Calculated)

Crystal System:

Orthorhombic

Name:

The name is for Pleystein, a municipality in Bavaria, Germany. The Hagendorf-Süd pegmatite, the type locality, is located near the municipal area of Pleystein.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:470496:2

bbf82867-1f5a-477a-a9db-da647ad2d0f0

IMA Classification of PleysteiniteHide

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IMA Formula:

[(H2O)0.5K0.5]2Mn2Al3(PO4)4F2 · 4H2O

Classification of PleysteiniteHide

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8.DG.

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
G : With large and medium-sized cations, (OH, etc.):RO4< 0.5:1

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 PleysteiniteHide

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Density:

2.34 g/cm3 (Calculated)

Optical Data of PleysteiniteHide

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RI values:

_n_α = 1.566(2) _n_β = 1.580(2) _n_γ = 1.600(2)

2V:

Measured: 80° (1), Calculated: 80.7°

δ = 0.034

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

Optical Extinction:

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

Chemistry of PleysteiniteHide

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Mindat Formula:

[(H2O)0.5K0.5]2Mn2Al3(PO4)4F2 · 14H2O

Crystallography of PleysteiniteHide

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Crystal System:

Orthorhombic

Class (H-M):

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

Cell Parameters:

a = 10.4133(8) Å, b = 20.524(2) Å, c = 12.265(1) Å

Ratio:

a:b:c = 0.507 : 1 : 0.598

Unit Cell V:

2,621.31 ų (Calculated from Unit Cell)

Morphology:

Stubby prisms flattened on {010} with pyramidal terminations. Forms include {111}, {100} and {001}.

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Type Occurrence of PleysteiniteHide

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General Appearance of Type Material:

Isolated and small aggregates of colourless, stubby prisms that are typically 10 to 30 µm wide and up to 100 µm long.

Place of Conservation of Type Material:

Type material is deposited in the collections of the Staatlichen Naturwissenschaftlichen Sammlungen Bayerns, Menzinger Str. 71, 80638 Munich, Germany, registration number MSM 38032 (holotype), and the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue number 76271 (cotype).

Geological Setting of Type Material:

Pegmatite. In altered zwieselite.

Associated Minerals at Type Locality:

Synonyms of PleysteiniteHide

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Relationship of Pleysteinite 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 PleysteiniteHide

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References for PleysteiniteHide

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Reference List:

Grey, Ian E., Hochleitner, Rupert, Rewitzer, Christian, Kampf, Anthony R., MacRae, Colin M., Gable, Robert W., Mumme, William G., Keck, Erich, Davidson, Cameron (2023) Pleysteinite, [(H2O)0.5K0.5]2Mn2Al3(PO4)4F2(H2O)10⋅4H2O, the Al analogue of benyacarite, from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria, Germany. European Journal of Mineralogy, 35 (2) 189-197 doi:10.5194/ejm-35-189-2023

Localities for PleysteiniteHide

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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.