Plumboperloffite (original) (raw)

A valid IMA mineral species

Formula:

PbMn2+2Fe3+2(PO4)3(OH)3

Specific Gravity:

4.416 (Calculated)

Crystal System:

Monoclinic

Name:

The name is for the relationship to perloffite with Pb dominating the X site.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:54657:1

7ca67e9b-e577-4df2-96bb-47c2ab536932

IMA Classification of PlumboperloffiteHide

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Type description reference:

Classification of PlumboperloffiteHide

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8.BH.20

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
H : With medium-sized and large cations, (OH,etc.):RO4 = 1:1

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 PlumboperloffiteHide

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Comment:

based on the hardness of other bjarebyite-group minerals.

Cleavage:

Perfect
excellent cleavage on {100}

Fracture:

Irregular/Uneven

Density:

4.416 g/cm3 (Calculated)

Optical Data of PlumboperloffiteHide

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RI values:

_n_α = 1.870(1) _n_β = 1.880(1) _n_γ = 1.890(1)

2V:

Measured: 88° (1), Calculated: 90.5°

δ = 0.020

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

Dispersion:

Dispersion is apparently strong, based on extinction colours and the orientation is Y = b.

Comments:

The pleochroism in shades of yellow brown is X < Z < Y.

Chemistry of PlumboperloffiteHide

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Mindat Formula:

PbMn2+2Fe3+2(PO4)3(OH)3

Chemical AnalysisHide

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Empirical formulas:

Sample references:

Crystallography of PlumboperloffiteHide

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Crystal System:

Monoclinic

Class (H-M):

2/m - Prismatic

Cell Parameters:

a = 9.176(2) Å, b = 12.340(3) Å, c = 5.009(1) Å
β = 101.01(3)°

Ratio:

a:b:c = 0.744 : 1 : 0.406

Unit Cell V:

556.74 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Comments:

From Type Description.

Geological EnvironmentHide

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Type Occurrence of PlumboperloffiteHide

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General Appearance of Type Material:

The mineral forms intergrowths of subparallel, thin tabular to bladed crystals. Individual crystals are up to 40 µm in length.

Place of Conservation of Type Material:

Type material is deposited in the mineralogical collections of the South Australian Museum, North Terrace, Adelaide, South Australia 5000, Australia, registration number G34868

Geological Setting of Type Material:

pegmatites belong to the beryl-columbite phosphate-rare element type in the classification of Černý

Associated Minerals at Type Locality:

Synonyms of PlumboperloffiteHide

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Relationship of Plumboperloffite 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 PlumboperloffiteHide

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References for PlumboperloffiteHide

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Localities for PlumboperloffiteHide

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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.