UM1982-08-PO:FeHMn
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Formula:
FeMnPO5 · 2H2O
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.
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 Identifiers
Mindat ID:
47644
Long-form identifier:
mindat:1:1:47644:9
Similar Names
| UM1955-01-PO:FeHMn | Fe-Mn-P-O-H | |
| UM1992-15-PO:FeHMg | ~(Fe,Mg)5(PO4)3(OH) · 2H2O | |
| UM1992-16-PO:FeHMg | ~(Mg,Fe)5(PO4)3(OH) · 2H2O | |
| UM1992-17-PO:FeHMg | ~(Fe,Mn,Ca)4P3O10(OH)3 · 15H2O | |
| UM1992-18-PO:FeHMnNa | ~NaFe4MnP5O18 · 10H2O | |
| UM1992-20-PO:FeMn | Fe-Mn-P-O | |
| UM2006-27-PO:FeHZn | ZnFe23+(PO4)2(OH)2 · 4H2O |
Optical Data of UM1982-08-PO:FeHMn
Type:
Biaxial
RI values:
nα = 1.80 nγ = 1.85
Max. Birefringence:
δ = 0.050
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
Surface Relief:
Moderate
Comments:
2V is small; absorption: Z > Y = X; fiber axis: c
Chemistry of UM1982-08-PO:FeHMn
Mindat Formula:
FeMnPO5 · 2H2O
Element Weights:
Crystallography of UM1982-08-PO:FeHMn
Crystal System:
Monoclinic
Cell Parameters:
a = 6.44(2) Å, b = 6.93(2) Å, c = 19.43(3) Å
β = 93.15°
β = 93.15°
Ratio:
a:b:c = 0.929 : 1 : 2.804
Unit Cell V:
866 ų
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.464 Å | (vs) |
| 3.264 Å | (s) |
| 3.218 Å | (s) |
Other Information
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:FeHMn
mindat.org URL:
https://www.mindat.org/min-47644.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for UM1982-08-PO:FeHMn
Reference List:
Localities for UM1982-08-PO:FeHMn
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Germany | |
| von Knorring et al. (1982) +1 other reference |
Rwanda | |
| von Knorring et al. (1982) +2 other references |
