Calciogadolinite-(Y)
A variety of Gadolinite-(Y)
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About Calciogadolinite-(Y)
Formula:
(YCa)2Fe3+Be2[SiO4]2O2
Name:
Named by T. Nakai in 1938 according to composition and similarity with gadolinite, but considered questionable. Discredited in 2006 (considered Ca-bearing gadolinite under current site-dominance rules).
A Ca-dominant gadolinite. Although Ca dominates over any individual REE, the current site dominance rules do not allow for species status because trivalent elements (mostly REE) dominate over total divalent elements (mostly Ca) on the site.
Unique Identifiers
Mindat ID:
833 (as Calciogadolinite-(Y))
1628 (as Gadolinite-(Y))
1628 (as Gadolinite-(Y))
Long-form identifier:
mindat:1:1:833:6 (as Calciogadolinite-(Y))
mindat:1:1:1628:1 (as Gadolinite-(Y))
mindat:1:1:1628:1 (as Gadolinite-(Y))
IMA Classification of Calciogadolinite-(Y)
Discredited
Classification of Calciogadolinite-(Y)
54.2.1b.4
54 : NESOSILICATES Borosilicates and Some Beryllosilicates
2 : Borosilicates and Some Beryllosilicates with B in [4] coordination
54 : NESOSILICATES Borosilicates and Some Beryllosilicates
2 : Borosilicates and Some Beryllosilicates with B in [4] coordination
14.3.25
14 : Silicates not Containing Aluminum
3 : Silicates of Be
14 : Silicates not Containing Aluminum
3 : Silicates of Be
Chemistry of Calciogadolinite-(Y)
Mindat Formula:
(YCa)2Fe3+Be2[SiO4]2O2
Element Weights:
Other Language Names for Calciogadolinite-(Y)
German:Calciogadolinit
Spanish:Calciogadolinita
Common Associates
Associations Based on Photo Data:
| 6 photos of Calciogadolinite-(Y) associated with Hingganite-(Y) | (Y,REE,Ca)2(◻,Fe2+)Be2[SiO4]2(OH)2 |
| 6 photos of Calciogadolinite-(Y) associated with Hingganite-(Ce) | (Ce,REE)2(◻,Fe2+)Be2[SiO4]2(OH)2 |
| 3 photos of Calciogadolinite-(Y) associated with Quartz | SiO2 |
| 3 photos of Calciogadolinite-(Y) associated with Microcline | K(AlSi3O8) |
| 2 photos of Calciogadolinite-(Y) associated with Thorite | Th(SiO4) |
| 2 photos of Calciogadolinite-(Y) associated with 'Betafite (of Hogarth 1977)' | (Ca,Na,U)2(Ti, Nb,Ta)2O6Z(OH) |
Other Information
Health Risks:
Contain Be and radioactive.
Internet Links for Calciogadolinite-(Y)
mindat.org URL:
https://www.mindat.org/min-833.html
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References for Calciogadolinite-(Y)
Localities for Calciogadolinite-(Y)
Showing 4 localities.
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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.
Italy | |
| King (n.d.) |
Japan | |
| Nagashima & Nagashima (1960) |
Mongolia | |
| Kartashov P.M. et al. (Mongolian Altai) |
| Kovalenko et al. (2004) |
Tat'yana pegmatite, Mount Ulyn Khuren, Khaldzan Buragtag massif, Myangad District, Khovd Province, Mongolia