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UM1979-07-PO:CaFeHREESiTh

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Formula:
(Th,Fe2+,Ca,Fe3+,REE)(PO4,SiO4)(OH)
Originally reported as Fe+2Th(PO4)2
Colour:
Red-brown to red-orange
Crystal System:
Monoclinic
One of four potentially new species from Markocice, Bogatynia area (Łużyce granitoids), Poland, reported as "Mineral U-1", from. 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, 'UM1979-08-PO:CCaFeHREESiTh', 'UM1979-09-PO:FeH', 'UM1979-10-PO:FeHREETh', and 'UM1980-04-PO:CaHREETh'.

Related to cheralite (and monazite), "but with Th > Ca". Possibly a Fe,Si-bearing cheralite.


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Unique IdentifiersHide

Mindat ID:
47474
Long-form identifier:
mindat:1:1:47474:2

Similar NamesHide

UM1979-08-PO:CCaFeHREESiTh(Th,Fe,Ca,REE)(PO4,SiO4,CO3) · 0.5H2O

Physical Properties of UM1979-07-PO:CaFeHREESiThHide

Colour:
Red-brown to red-orange

Chemistry of UM1979-07-PO:CaFeHREESiThHide

Mindat Formula:
(Th,Fe2+,Ca,Fe3+,REE)(PO4,SiO4)(OH)

Originally reported as Fe+2Th(PO4)2
Element Weights:
Element% weight
Th67.450 %
O23.254 %
P9.004 %
H0.293 %

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

Crystallography of UM1979-07-PO:CaFeHREESiThHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 6.68 Å, b = 6.97 Å, c = 6.41 Å
β = 103.88°
Ratio:
a:b:c = 0.958 : 1 : 0.92
Unit Cell V:
289.73 ų (Calculated from Unit Cell)
Z:
4
Comment:
Space group is P21/n; unit cell parameters somewhat similar to those of (type) cheralite

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 UM1979-07-PO:CaFeHREESiThHide

References for UM1979-07-PO:CaFeHREESiThHide

Localities for UM1979-07-PO:CaFeHREESiThHide

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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