Zirconolite-3O
A structural variant of Zirconolite
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About Zirconolite-3O
Formula:
(Ca,REE)2Zr2(Ti,Nb)3FeO14
From Chukanov et al. (2018)
Crystal System:
Orthorhombic
Name:
Named for the zirconium in its composition.
A polytype of Zirconolite
Originally described as a new mineral given the name polymignite by Berzelius (1824) from a syenite pegmatite at Fredriksvärn (now: Stavern), Vestfold, Norway. The specimens were collected by Nils Otto Tank (1800-1864) around 1823-1824, when he was a student of mineralogy. Polymignite at Stavern is metamict.
Brögger (1890) described in detail the morphology and the chemical and physical properties. Lima-de-Faria (1958) found that recrystallization at 700℃ of the type material gave a cubic phase (with fluorite structure). Pudovkina et al. (1969) calculated, based on the axial ratios (0.712:1:0.512) given by Brögger (1890) and the cell unit volume, that polymignite is orthorhombic. Later shown to be identical with zirconolite described in 1956, and subsequently discredited in 1988. In spite of its priority and wide use in the literature, polymignite is now considered a metamict, originally orthorhombic polytype of zirconolite.
Haifler et al. (2021) investigated three samples of metamict "Polymignite" from different syenite pegmatites near Stavern and found that the chemical composition corresponded to the zirconolite-related minerals stefanweissite and nöggerathite-(Ce).
Originally described as a new mineral given the name polymignite by Berzelius (1824) from a syenite pegmatite at Fredriksvärn (now: Stavern), Vestfold, Norway. The specimens were collected by Nils Otto Tank (1800-1864) around 1823-1824, when he was a student of mineralogy. Polymignite at Stavern is metamict.
Brögger (1890) described in detail the morphology and the chemical and physical properties. Lima-de-Faria (1958) found that recrystallization at 700℃ of the type material gave a cubic phase (with fluorite structure). Pudovkina et al. (1969) calculated, based on the axial ratios (0.712:1:0.512) given by Brögger (1890) and the cell unit volume, that polymignite is orthorhombic. Later shown to be identical with zirconolite described in 1956, and subsequently discredited in 1988. In spite of its priority and wide use in the literature, polymignite is now considered a metamict, originally orthorhombic polytype of zirconolite.
Haifler et al. (2021) investigated three samples of metamict "Polymignite" from different syenite pegmatites near Stavern and found that the chemical composition corresponded to the zirconolite-related minerals stefanweissite and nöggerathite-(Ce).
Unique Identifiers
Mindat ID:
6657
Long-form identifier:
mindat:1:1:6657:6
Chemistry of Zirconolite-3O
Mindat Formula:
(Ca,REE)2Zr2(Ti,Nb)3FeO14
From Chukanov et al. (2018)
From Chukanov et al. (2018)
Element Weights:
Crystallography of Zirconolite-3O
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Cell Parameters:
a = 10.148(4) Å, b = 14.147(5) Å, c = 7.278(3) Å
Ratio:
a:b:c = 0.717 : 1 : 0.514
Unit Cell V:
1,044.86 ų (Calculated from Unit Cell)
Z:
8
Comment:
Space group Acam.
First Recorded Occurrence of Zirconolite-3O
Synonyms of Zirconolite-3O
Other Language Names for Zirconolite-3O
Russian:Цирконолит-3О
Common Associates
Associations Based on Photo Data:
| 11 photos of Zirconolite-3O associated with Microcline | K(AlSi3O8) |
| 5 photos of Zirconolite-3O associated with Amphibole Supergroup | AB2C5(T8O22)W2 |
| 5 photos of Zirconolite-3O associated with Magnetite | Fe2+Fe3+2O4 |
| 2 photos of Zirconolite-3O associated with Wöhlerite | Na2Ca4ZrNb(Si2O7)2O3F |
| 2 photos of Zirconolite-3O associated with Fluorite | CaF2 |
| 1 photo of Zirconolite-3O associated with Ferro-katophorite | Na(CaNa)(Fe2+4Al)(AlSi7O22)(OH)2 |
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 Zirconolite-3O
mindat.org URL:
https://www.mindat.org/min-6657.html
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References for Zirconolite-3O
Reference List:
Berzelius, J. (1824) Undersökning af några Mineralier. 2. Polymignit. Kungliga Svenska vetenskapsakademiens handlingar, S. 3 Vol. 12. Kungl. Svenska vetenskapsakademien. 338-345
Mazzi, Fiorenzo, Munno, Rosalba (1983) Calciobetafite (new mineral of the pyrochlore group) and related minerals from Campi Flegrei, Italy; crystal structures of polymignyte and zirkelite: comparison with pyrochlore and zirconolite. American Mineralogist, 68 (1-2) 262-276
Bayliss, Peter, Mazzi, Fiorenzo, Munno, Rosalba, White, Tim J. (1989) Mineral nomenclature: zirconolite. Mineralogical Magazine, 53 (373) 565-569 doi:10.1180/minmag.1989.053.373.07
Harley, Simon L. (1994) Mg-Al yttrian zirconolite in a partially melted sapphirine granulite, Vestfold Hills, East Antarctica. Mineralogical Magazine, 58 (391) 259-269 doi:10.1180/minmag.1994.058.391.08
Bellatreccia, Fabio, Della Ventura, Giancarlo, Williams, C. Terry, Lumpkin, Gregory R., Smith, Katherine L., Colella, Michael (2002) Non-metamict zirconolite polytypes from the feldspathoid-bearing alkali-syenitic ejecta of the Vico volcanic complex (Latium, Italy) European Journal of Mineralogy, 14 (4) 809-820 doi:10.1127/0935-1221/2002/0014-0809
Chukanov, Nikita, Zubkova, Natalia, Britvin, Sergey, Pekov, Igor, Vigasina, Marina, Schäfer, Christof, Ternes, Bernd, Schüller, Willi, Polekhovsky, Yury, Ermolaeva, Vera, Pushcharovsky, Dmitry (2018) Nöggerathite-(Ce), (Ce,Ca)2Zr2(Nb,Ti)(Ti,Nb)2Fe2+O14, a new zirconolite-related mineral from the Eifel volcanic region, Germany. Minerals, 8 (10) 449 doi:10.3390/min8100449
Localities for Zirconolite-3O
Showing 55 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.
Håkestad Quarry, Håkestad, Tjølling, Larvik Commune, Vestfold, Norway