UM1982-08-PO:FeHMn (original) (raw)

A material that is NOT an approved mineral species

Crystal System:

Monoclinic

Said to be similar to 'UM1949-01-PO:Fe' and possibly to a phase reported by Frondel in vol. 53 of the American Mineralogist (pp. 513-540).

Radial, fibrous habit; poor material quality preceded obtaining better optical and PXRD data. No information on water presence, content or analysis found in the abstract of the original paper.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:47644:9

7e30c3d3-5edb-4f07-b199-da85c399ea3e

Optical Data of UM1982-08-PO:FeHMnHide

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RI values:

_n_α = 1.800 _n_γ = 1.850
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δ = 0.050

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

Comments:

2V is small; absorption: Z > Y = X; fiber axis: c

Chemistry of UM1982-08-PO:FeHMnHide

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Mindat Formula:

FeMnPO5 · 2H2O

Crystallography of UM1982-08-PO:FeHMnHide

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Crystal System:

Monoclinic

Cell Parameters:

a = 6.44(2) Å, b = 6.93(2) Å, c = 19.43(3) Å
β = 93.15°

Ratio:

a:b:c = 0.929 : 1 : 2.804

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

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 UM1982-08-PO:FeHMnHide

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References for UM1982-08-PO:FeHMnHide

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Reference List:

Knorring, O.V., Sahama, Th.G. (1982): Some Fe-Mn phosphates from the Buranga pegmatite, Rwanda. Schweiz. Mineral. Petr. Mitt.: 62: 343-352; in: Dunn, P.J., Grice, J.D., Fleischer, M., Pabst, A. (1984): New mineral names. American Mineralogist: 69: 213

Localities for UM1982-08-PO:FeHMnHide

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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.