Yttrofluorite
A variety of Fluorite
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About Yttrofluorite
Formula:
(Ca1-xYx)F2+x where 0.05 < x < 0.3
Name:
Named for chemical composition.
First Recorded Locality:
Yttrofluorite is a variety of fluorite containing an appreciable amount of trivalent yttrium (Y) taking the place of divalent calcium (Ca) cations in the fluorite structure. Many early identifications of yttrofluorite are likely to be purple fluorite without appreciable yttrium. Yttrofluorite is not commonly purple.
Originally reported from Hundholmen, Tysfjord, Nordland, Norway. [Precise locality not mentioned in Vogt 1911, but first in Vogt 1923.]
See also yttrocerite.
Originally reported from Hundholmen, Tysfjord, Nordland, Norway. [Precise locality not mentioned in Vogt 1911, but first in Vogt 1923.]
See also yttrocerite.
Unique Identifiers
Mindat ID:
4371 (as Yttrofluorite)
1576 (as Fluorite)
1576 (as Fluorite)
Long-form identifier:
mindat:1:1:4371:3 (as Yttrofluorite)
mindat:1:1:1576:5 (as Fluorite)
mindat:1:1:1576:5 (as Fluorite)
IMA Classification of Yttrofluorite
Discredited
Approval history:
Discredited by IMA in 2006 (IMA 06–C) = a Y-enriched variety of fluorite, cf. Burke 2006.
Chemistry of Yttrofluorite
Mindat Formula:
(Ca1-xYx)F2+x where 0.05 < x < 0.3
Elements listed:
Chemical Analysis
Oxide wt%:
| 1 | 2 | |
|---|---|---|
| F | 33.1 % | 39.0 % |
| CO2 | 2.9 % | 1.0 % |
| SiO3 | 0.4 % | 2.6 % |
| P2O5 | 0.06 % | 0.04 % |
| CaO | 35.1 % | 44.50 % |
| Na2O | 0.16 % | 0.25 % |
| K2O | 0.05 % | 0.05 % |
| Y2O3 | 6.49 % | 13.99 % |
| La2O3 | 6.37 % | 0.46 % |
| CeO | 14.71 % | 1.52 % |
| Pr3O2 | 1.21 % | 0.20 % |
| Nd2O3 | 5.68 % | 1.19 % |
| Sm2O3 | 1.33 % | 0.57 % |
| Gd2O3 | 1.29 % | 1.19 % |
| Tb2O3 | 0.16 % | |
| Dy2O3 | 1.21 % | 1.30 % |
| Ho2O3 | 0.20 % | |
| Er2O3 | 0.77 % | 0.95 % |
| Tm2O3 | 0.12 % | |
| Yb2O3 | 0.69 % | 0.73 % |
| Total: | 112 % | 109.54 % |
Sample references:
| ID | Locality | Reference | Notes |
|---|---|---|---|
| 1 | Hundholmen, Narvik, Nordland, Norway | Analysis by Andreassen and constructor Solem, Department of Chemistry, Norges Geologiske Unde | |
| 2 | Nedre Eivollen, Eivollen, Drag, Hamarøy, Nordland, Norway |
First Recorded Occurrence of Yttrofluorite
Other Language Names for Yttrofluorite
Common Associates
Associations Based on Photo Data:
| 50 photos of Yttrofluorite associated with Allanite-(Ce) | (CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH) |
| 24 photos of Yttrofluorite associated with Bastnäsite-(Ce) | Ce(CO3)F |
| 23 photos of Yttrofluorite associated with Hundholmenite-(Y) | (Y,REE,Ca,Na)15(Al,Fe3+)(CaxAs3+1-x)(Si,As5+)Si6B3(O,F)48 |
| 21 photos of Yttrofluorite associated with Thalénite-(Y) | Y3Si3O10F |
| 11 photos of Yttrofluorite associated with Quartz | SiO2 |
| 10 photos of Yttrofluorite associated with Vyuntspakhkite-(Y) | (Y,Yb)4Al2.5-1.5(Si,Al)1.5-2.5(SiO4)4O(OH)7 |
| 9 photos of Yttrofluorite associated with Keiviite-(Y) | Y2Si2O7 |
| 9 photos of Yttrofluorite associated with Stetindite-(Ce) | Ce4+SiO4 |
| 8 photos of Yttrofluorite associated with Microcline | K(AlSi3O8) |
| 7 photos of Yttrofluorite associated with 'Zinnwaldite' |
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 Yttrofluorite
mindat.org URL:
https://www.mindat.org/min-4371.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
Mineral Dealers:
References for Yttrofluorite
Reference List:
Vogt, Thorolf (1911) Vorlaufige Mitteilung über Yttrofluorit, eine neue Mineralspezies aus dem nördlichen Norwegen. Centralblatt für Mineralogie, Geologie und Paläontologie, 1911. 373-377
Sverdrup, Thor L. (1968) Yttrofluorite-yttrocerite-cerfluorite in Norwegian pegmatites. Contributions to the mineralogy of Norway, no. 37. Norsk Geologisk Tidsskrift [Norwegian Journal of Geology], 48 (4) 245-252
Localities for Yttrofluorite
Showing 61 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.
Argentina | |
| Dina (1993) |
Canada | |
| Norman Wilson collection |
| Robertson (1976) |
China | |
| De Ascenção Guedes (2023) |
| Rucheng Wang et al. (2003) |
Egypt | |
| Shalaby et al. (2002) |
| Saleh (2007) | |
India | |
| Balasubramaniam et al. (1977) |
Japan | |
| Fluorite: The Collector's Choice. Extra ... |
Kazakhstan | |
| PM Kartashov specimen |
| Evseev (1995) |
Kyrgyzstan | |
| |
| Djenchuraeva et al. (2008) +1 other reference | |
Malawi | |
| pdfs.semanticscholar.org (n.d.) +5 other references |
Mongolia | |
| web.archive.org (n.d.) |
Namibia | |
| www.mineral.tu-freiberg.de (2003) |
| Orris et al. (2002) |
| Fluorite: The Collector's Choice. Extra ... |
| Orris et al. (2002) |
| Orris et al. (2002) |
Norway | |
| Frigstad (1968) |
| Müller et al. (2012) | |
| Sverdrup (1968) |
| Sverdrup et al. (1965) | |
| Husdal (2008) |
| Pavel M. Kartashov (n.d.) +1 other reference |
| Neumann (1985) | |
| Husdal (2008) | |
| Husdal (2008) | |
| Vogt (1911) +3 other references |
| Larsen (1990) +3 other references | |
| Sverdrup (1968) | |
| Sverdrup (1968) +1 other reference |
Russia | |
| Alekseev (2025) |
| Alekseev (2025) | |
| Voloshin A.V. et al. (1986) +1 other reference |
| Pekov et al. (2008) |
| USGS Open File Report 2005-1252 p175 |
| Seltmann et al. (2010) +3 other references |
Sweden | |
| Jonsson (1991) |
Tajikistan | |
| Mirakov M.A. et al. (2018) |
Ukraine | |
| Pavel M. Kartashov (n.d.) |
USA | |
| Pavel M. Kartashov analytical data (2011) |
| Eckel et al. (1997) |
| Eckel et al. (1997) |
| Hanson et al. (2013) | |
| Eckel et al. (1997) |
| Simmons et al. (1980) |
| Jacobson et al. (1990) +1 other reference | |
| Simmons et al. (1980) | |
| Eckel et al. (1997) | |
| Meeves et al. (1966) +2 other references | |
| Meeves et al. (1966) |
| Eckel et al. (1997) |
| www.museum.mtu.edu (n.d.) |
| Chris Clemens photo |
| Northrop (1959) |
| Miller |
| Crook et al. (1977) |
| Am. Min. 74:865-869 (1989) |
| Weng et al. (2013) +3 other references |
Hundholmen, Narvik, Nordland, Norway