Dollaseite Group
A group of related mineral species
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About Dollaseite Group
Formula:
(A12+REE3+)(M12+M23+M32+)F[Si2O7][SiO4](OH)
A1 = Ca, Mn
A2 = Ca, Pb, Sr, REE
M1 = Al, Fe, V
M2 = Al, Cr
M3 = Al, Fe, Mn, Mg
A2 = Ca, Pb, Sr, REE
M1 = Al, Fe, V
M2 = Al, Cr
M3 = Al, Fe, Mn, Mg
Member of:
Members of the dollaseite group are "REE-rich minerals typified by the eponymous mineral “dollaseite”. This subgroup is derived from clinozoisite by homovalent substitutions and two coupled heterovalent substitutions of the type A2(REE)3+ + M3M2+→A2Ca2+ + M3M3+ and M1M2+ + O4F-→M1M3+ + O4O-2. Thus the valences on the key sites are: A1 = M2+, A2 = M3+, M1 = M2+, M2 = M3+, M3 = M2+, O4 = F-, O10 = (OH)-" (Armbruster et al., 2006).
If O is replaced by F, the mineral is in the Dollaseite group.
If O is replaced by F, the mineral is in the Dollaseite group.
Unique Identifiers
Mindat ID:
46224
Long-form identifier:
mindat:1:1:46224:2
IMA Classification of Dollaseite Group
IMA status notes:
IMA Approved Group Name
Approval history:
IMA Proposal 09A (Armbruster et al. 2006, Mills et al. 2009).
Chemistry of Dollaseite Group
Mindat Formula:
(A12+REE3+)(M12+M23+M32+)F[Si2O7][SiO4](OH)
A1 = Ca, Mn
A2 = Ca, Pb, Sr, REE
M1 = Al, Fe, V
M2 = Al, Cr
M3 = Al, Fe, Mn, Mg
A1 = Ca, Mn
A2 = Ca, Pb, Sr, REE
M1 = Al, Fe, V
M2 = Al, Cr
M3 = Al, Fe, Mn, Mg
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) |
|---|---|---|---|---|---|---|---|
| 0001187 | Dollaseite-(Ce) | Peacor D R, Dunn P J (1988) Dollaseite-(Ce) (Magnesium orthite redefined): Structure refinement and implications for F + M2+ substitutions in epidote-group minerals American Mineralogist 73 838-842 |  | 1988 | 0 | 293 |
CIF Raw Data - click here to close
Synonyms of Dollaseite Group
Relationship of Dollaseite Group to other Species
Member of:
Other Members of Epidote Supergroup:
| Allanite Group | (A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH) | |
| Åskagenite Group | (A12+REE3+)(M13+M23+M33+)O[Si2O7][SiO4]O | |
| Epidote Group | (A12+A22+)(M13+M23+M33+)O[Si2O7][SiO4](OH) | |
| 'Unnamed ([Ca-Ce]+[Al-Al-Mn] member of the Epidote Supergroup)' | (CaCe)(AlAlMn2+)O[Si2O7][SiO4](OH) or (CaCe)(AlAlMn3+)O[Si2O7][SiO4]O | |
| 'Unnamed ([Ca-Ce]+[Fe3-Cr-Fe] member of the Epidote Supergroup)' | (CaCe)(Fe3+Cr3+Fe2+)[SiO4][Si2O7]O(OH) or (CaCe)(Fe3+Cr3+Fe3+)[SiO4][Si2O7]OO | |
| 'Unnamed ([Ca-La]+[Al-Al-Mn] member of the Epidote Supergroup)' | (CaLa)(AlAlMn2+)O[Si2O7][SiO4](OH) or (CaLa)(AlAlMn3+)O[Si2O7][SiO4]O | |
| 'Unnamed ([Ca-La]+[Fe3-Al-Mn] member of the Epidote Supergroup)' | (CaLa)(Fe3+AlMn2+)O[Si2O7][SiO4](OH) or (CaLa)(Fe3+AlMn3+)O[Si2O7][SiO4]O | |
| 'Unnamed ([Mn2-Ce]+[Al-Al-Mn] member of the Epidote Supergroup)' | (Mn2+Ce)(AlAlMn2+)O[Si2O7][SiO4](OH) or (Mn2+Ce)(AlAlMn3+)O[Si2O7][SiO4]O | |
| 'Unnamed ([Mn2-Nd]+[Al-Al-Mn] member of the Epidote Supergroup)' | (Mn2+Nd)(AlAlMn2+)O[Si2O7][SiO4](OH) or (Mn2+Nd)(AlAlMn3+)O[Si2O7][SiO4]O |
Dollaseite Group Members:
| Dollaseite-(Ce) | (CaCe)(MgAlMg)F[Si2O7][SiO4](OH) | Mon. 2/m : P21/m |
| Khristovite-(Ce) | (CaCe)(MgAlMn2+)F[Si2O7][SiO4](OH) | Mon. 2/m : P21/m |
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 Dollaseite Group
mindat.org URL:
https://www.mindat.org/min-46224.html
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References for Dollaseite Group
Reference List:
Armbruster, Thomas, Bonazzi, Paola, Akasaka, Masahide, Bermanec, Vladimir, Chopin, Christian, Gieré, Reto, Heuss-Assbichler, Soraya, Liebscher, Axel, Menchetti, Silvio, Pan, Yuanming, Pasero, Marco (2006) Recommended nomenclature of epidote-group minerals. European Journal of Mineralogy, 18 (5) 551-567 doi:10.1127/0935-1221/2006/0018-0551
Localities for Dollaseite Group
Showing 20 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.
Östanmossa mine, Röberg ore field, Norberg, Västmanland County, Sweden