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UM1979-08-PO:CCaFeHREESiTh

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Formula:
(Th,Fe,Ca,REE)(PO4,SiO4,CO3) · 0.5H2O
Originally reported as Fe+2Th(PO4)2•H2O
Colour:
White to yellow with green or red-orange tinge
Crystal System:
Hexagonal
One of four potentially new species from Markocice, Bogatynia area (Łużyce granitoids), Poland, reported as "Mineral U-2". Composition of all 4 phases (analyzed by EPMA, DTA, TGA, XRD and IR) is variable and it is unsure how it was deduced from the analyses. Associates with thorite, so-called thorogummite, 'UM1979-07-PO:CaFeHREESiTh', 'UM1979-09-PO:FeH', 'UM1979-10-PO:FeHREETh', and 'UM1980-04-PO:CaHREETh'.

Related to brockite, but with Th > Ca (thus maybe identical with grayite?). Also related to rhabdophane. Possibly the Si-enriched Th analogue of brockite (but water amount differs).


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Unique IdentifiersHide

Mindat ID:
47475
Long-form identifier:
mindat:1:1:47475:1

Physical Properties of UM1979-08-PO:CCaFeHREESiThHide

Colour:
White to yellow with green or red-orange tinge

Chemistry of UM1979-08-PO:CCaFeHREESiThHide

Mindat Formula:
(Th,Fe,Ca,REE)(PO4,SiO4,CO3) · 0.5H2O

Originally reported as Fe+2Th(PO4)2•H2O
Element Weights:
Element% weight
Th69.055 %
O21.427 %
P9.218 %
H0.300 %

Calculated from ideal end-member formula.
Elements listed:
C, Ca, Fe, H, O, P, Si, Th - search for minerals with similar chemistry

Crystallography of UM1979-08-PO:CCaFeHREESiThHide

Crystal System:
Hexagonal
Cell Parameters:
a = 7.04 Å, c = 6.36 Å
Ratio:
a:c = 1 : 0.903
Unit Cell V:
272.98 ų (Calculated from Unit Cell)
Z:
3
Comment:
data not sure; unit cell parameters very similar to those of (type) brockite

RadioactivityHide

Other InformationHide

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 UM1979-08-PO:CCaFeHREESiThHide

References for UM1979-08-PO:CCaFeHREESiThHide

Localities for UM1979-08-PO:CCaFeHREESiThHide

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

- 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.
Poland
 
  • Lower Silesian Voivodeship
    • Zgorzelec County
      • Bogatynia
        • Markocice
Fe+2Th (PO4) +5 other references
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To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
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