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Julgoldite Subgroup
A group of related mineral species
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About Julgoldite Subgroup
Formula:
Ca2XFe3+2[Si2O6(OH)][SiO4](OH)2A
X = Mg, Fe2+, Fe3+
A = OH, O
A = OH, O
Member of:
Name:
Originally Julgoldite was named as a species, but later redefined as a subgroup with several species. Named in 1971 by Moore in honor of Julian Royce Goldsmith (26 February 1918, Chicago, Illinois, USA - 23 January 1999, USA), geochemist at the University of Chicago. He was an expert on feldspars and carbonates. He also served as president of the Geochemical Society, the Mineralogical Society of America, and the Geological Society of America.
Unique Identifiers
Mindat ID:
39505
Long-form identifier:
mindat:1:1:39505:6
Chemistry of Julgoldite Subgroup
Mindat Formula:
Ca2XFe3+2[Si2O6(OH)][SiO4](OH)2A
X = Mg, Fe2+, Fe3+
A = OH, O
X = Mg, Fe2+, Fe3+
A = OH, O
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0014461 | Julgoldite-(Fe3+) | Allmann R, Donnay G (1973) The crystal structure of julgoldite Mineralogical Magazine 39 271-281 |  | 1973 | Langban, Sweden | 0 | 293 |
| 0003146 | Julgoldite-(Fe3+) | Artioli G, Geiger C A, Dapiaggi M (2003) The crystal chemistry of julgoldite-Fe3+ from Bombay, India, studied using synchrotron X-ray powder diffraction and 57Fe Mossbauer spectroscopy American Mineralogist 88 1084-1090 | | 2003 | 0 | 293 |
CIF Raw Data - click here to close
Synonyms of Julgoldite Subgroup
Relationship of Julgoldite Subgroup to other Species
Member of:
Other Members of Pumpellyite Group:
| Okhotskite | Ca2Mn2+Mn3+2[Si2O6OH][SiO4](OH)2(OH) | Mon. 2/m |
| Poppiite | Ca2V3+V3+2[Si2O6OH][SiO4](OH)2O | Mon. 2/m : B2/m |
| Pumpellyite Subgroup | Ca2XAl2[Si2O6(OH)][SiO4](OH)2A | |
| Shuiskite Subgroup | Ca2XCr3+2[Si2O6(OH)][SiO4](OH)2A |
Julgoldite Subgroup Members:
| Julgoldite-(Fe2+) | Ca2Fe2+Fe3+2[Si2O6OH][SiO4](OH)2(OH) | Mon. 2/m |
| Julgoldite-(Fe3+) | Ca2Fe3+Fe3+2[Si2O6OH][SiO4](OH)2O | Mon. |
| Julgoldite-(Mg) | Ca2MgFe3+2[Si2O6OH][SiO4](OH)2(OH) | Mon. |
Click on any node to view relationships. Formula-derived relationship network for the group members above. Use Find related species to add formula-neighbour species outside the current group view. Solid links show inferred chemical differences; dashed violet links show same-formula crystallographic differences. Hydration states are not treated as relationship changes. These relationships do not imply any real-world substitution reactions between these species.
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 Julgoldite Subgroup
mindat.org URL:
https://www.mindat.org/min-39505.html
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References for Julgoldite Subgroup
Reference List:
Livingstone, A. (1976) Julgoldite, new data and occurrences; a second recording. Mineralogical Magazine, 40 (315) 761-763 doi:10.1180/minmag.1976.040.315.10
Localities for Julgoldite Subgroup
Showing 42 localities.
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.
Australia | |
| Peter Elliot and Ben McHenry |
Canada | |
| [Julgoldite-(Fe3+)] Schumann et al. (2019) |
Czech Republic | |
| [Julgoldite-(Fe2+)] Vrtiška et al. (2025) |
Germany | |
| [Julgoldite-(Fe2+)] 70. +1 other reference |
| [Julgoldite-(Fe2+)] Walenta (1991) +1 other reference |
| [Julgoldite-(Fe2+)] Poser et al. (2004) |
| [Julgoldite-(Fe2+)] Weiß (1990) |
|
Rauschermühle Quarry, Niederkirchen, Otterbach-Otterberg, Kaiserslautern, Rhineland-Palatinate, Germany