Donate now to keep alive!Help|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on Mindat
What is a mineral?The most common minerals on earthMineral PhotographyThe Elements and their MineralsGeological TimeMineral Evolution
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
StatisticsThe ElementsMember ListBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery


This page is currently not sponsored. Click here to sponsor this page.
Wayne Dollase
6½ - 7
Crystal System:
In honour of Professor Wayne A. Dollase (1938-), University of California, Los Angeles, California, USA, for his research on the crystal chemistry of minerals of the epidote group, and the cerium content of the mineral.
Hide all sections | Show all sections

Classification of Dollaseite-(Ce)Hide

Approved, 'Grandfathered' (first described prior to 1959)

9 : SILICATES (Germanates)
B : Sorosilicates
G : Sorosilicates with mixed SiO4 and Si2O7 groups; cations in octahedral [6] and greater coordination

58 : SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
2 : Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)

16 : Silicates Containing Aluminum and other Metals
13 : Aluminosilicates of the rare earths

Physical Properties of Dollaseite-(Ce)Hide

6½ - 7 on Mohs scale

Optical Data of Dollaseite-(Ce)Hide

RI values:
nα = 1.715 nβ = 1.718 nγ = 1.733
Max Birefringence:
δ = 0.018
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
r > v

Chemical Properties of Dollaseite-(Ce)Hide

IMA Formula:

Crystallography of Dollaseite-(Ce)Hide

Crystal System:
Class (H-M):
2/m - Prismatic
Space Group:
Cell Parameters:
a = 8.934(18) Å, b = 5.721(7) Å, c = 10.176(22) Å
β = 114.31(12)°
a:b:c = 1.562 : 1 : 1.779
Unit Cell V:
473.99 ų (Calculated from Unit Cell)

Type Occurrence of Dollaseite-(Ce)Hide

Synonyms of Dollaseite-(Ce)Hide

Other Language Names for Dollaseite-(Ce)Hide

Relationship of Dollaseite-(Ce) to other SpeciesHide

Other Members of this group:
Khristovite-(Ce){CaCe}{MgAlMn2+}(Si2O7)(SiO4)(OH)FMon. 2/m : P21/m

Common AssociatesHide

Associated Minerals Based on Photo Data:
Norbergite1 photo of Dollaseite-(Ce) associated with Norbergite on
Bastnäsite-(Ce)1 photo of Dollaseite-(Ce) associated with Bastnäsite-(Ce) on

Related Minerals - Nickel-Strunz GroupingHide

9.BG.XCyprineCa19Cu2+(Al10Mg2)Si18O68(OH)10Tet. 4/m : P4/n
9.BG.05bAllanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
9.BG.05bAllanite-(La){CaLa}{Al2Fe2+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
9.BG.05aClinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
9.BG.05bDissakisite-(Ce){CaCe}{Al2Mg}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
9.BG.05aEpidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
9.BG.05Khristovite-(Ce){CaCe}{MgAlMn2+}(Si2O7)(SiO4)(OH)FMon. 2/m : P21/m
9.BG.05Piemontite{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
9.BG.05Tweddillite{CaSr}{Mn3+AlMn3+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
9.BG.05bFerriallanite-(Ce){CaCe}{Fe3+AlFe2+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
9.BG.05Niigataite{CaSr}{Al3}(Si2O7)(SiO4)O(OH)Mon. 2/m
9.BG.05Manganiandrosite-(Ce){Mn2+Ce}{Mn3+AlMn2+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
9.BG.05Dissakisite-(La){CaLa}{Al2Mg}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
9.BG.05Vanadoandrosite-(Ce){Mn2+Ce}{V3+AlMn2+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
9.BG.05Uedaite-(Ce){Mn2+Ce}{Al2Fe2+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
9.BG.05Epidote-(Sr){CaSr}{Al2Fe3+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
9.BG.05bAllanite-(Nd){CaNd}{Al2Fe2+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
9.BG.05bFerriallanite-(La){CaLa}{Fe3+AlFe2+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
9.BG.05bÅskagenite-(Nd){Mn2+Nd}{Al2Fe3+}(Si2O7)(SiO4)O2Mon. 2/m : P21/m
9.BG.10Zoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
9.BG.15SursassiteMn2+2Al3(SiO4)(Si2O7)(OH)3Mon. 2/m : P21/m
9.BG.20Julgoldite-(Fe2+)Ca2Fe2+Fe3+2(Si2O7)(SiO4)(OH)2 · H2OMon.
9.BG.20OkhotskiteCa2(Mn,Mg)(Mn3+,Al,Fe3+)2(Si2O7)(SiO4)(OH)2 · H2OMon.
9.BG.20Pumpellyite-(Fe2+)Ca2Fe2+Al2(Si2O7)(SiO4)(OH)2 · H2OMon.
9.BG.20Pumpellyite-(Fe3+)Ca2(Fe3+,Mg)(Al,Fe3+)2(Si2O7)(SiO4)(OH,O)2 · H2OMon.
9.BG.20Pumpellyite-(Mg)Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2OMon.
9.BG.20Pumpellyite-(Mn2+)Ca2Mn2+Al2(Si2O7)(SiO4)(OH)2 · H2OMon.
9.BG.20ShuiskiteCa2MgCr2(Si2O7)(SiO4)(OH)2 · 2H2OMon.
9.BG.20Julgoldite-(Fe3+)Ca2Fe3+Fe3+2(Si2O7)(SiO4)O(OH) · H2OMon.
9.BG.20Pumpellyite-(Al)Ca2Al3(Si2O7)(SiO4)(OH,O)2 · H2OMon.
9.BG.20PoppiiteCa2(V3+,Fe3+,Mg)(V3+,Al)2(Si2O7)(SiO4)(OH,O)2 · H2OMon. 2/m : B2/m
9.BG.20Julgoldite-(Mg)Ca2MgFe3+2(Si2O7)(SiO4)(OH)2 · H2OMon.
9.BG.35WiluiteCa19(Al,Mg)13(B,☐,Al)5(Si2O7)4(SiO4)10(O,OH)10Tet. 4/mmm (4/m 2/m 2/m) : P4/nnc
9.BG.35ManganvesuvianiteCa19Mn3+(Al,Mn3+,Fe3+)10(Mg,Mn2+)2(Si2O7)4(SiO4)10O(OH)9Tet. 4/m : P4/n
9.BG.35FluorvesuvianiteCa19(Al,Mg,Fe2+)13(Si2O7)4(SiO4)10O(F,OH)9Tet. 4/mmm (4/m 2/m 2/m)
9.BG.50Gatelite-(Ce)CaCe3Al2(Al,Mg)(Mg,Fe2+,Al)(Si2O7)(SiO4)3(O,F)(OH,O)2Mon. 2/m : P21/b
9.BG.55Västmanlandite-(Ce)Ce3CaMg2Al2Si2O15(OH)2FMon. 2/m : P21/m

Related Minerals - Dana Grouping (8th Ed.)Hide

58.2.1a.1Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
58.2.1a.2Allanite-(La){CaLa}{Al2Fe2+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
58.2.1a.4Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
58.2.1a.5Dissakisite-(Ce){CaCe}{Al2Mg}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
58.2.1a.7Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
58.2.1a.9Khristovite-(Ce){CaCe}{MgAlMn2+}(Si2O7)(SiO4)(OH)FMon. 2/m : P21/m
58.2.1a.11Piemontite{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

16.13.5Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
16.13.8Dissakisite-(Ce){CaCe}{Al2Mg}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Dollaseite-(Ce)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Peacor, D.R. and Dunn, P.J. (1988) Dollaseite-(Ce)(magnesium orthite redefined): structure refinement and implications for F + M 2+ substitution in epidote-group minerals. American Mineralogist: 73: 838-842.

Internet Links for Dollaseite-(Ce)Hide

Localities for Dollaseite-(Ce)Hide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Erongo Region
    • Arandis
Irene M. Abraham (2009): Geology and spatial distribution of uranium mineralisation in the SK anomaly area, Rossing area, Namibia, Master thesis University of the Witwatersrand.
  • Harghita Co.
Hirtopanu Paulina, Andersen C. Jens, Fairhurst J. Robert and Jakab Gyula (2013) Allanite-(Ce) and its associations, from the Ditrau alkaline intrusive massif. Proc. Rom. Acad., Series B, 2013, 15(1), p. 59–74
Szakáll, S. & Kristály, F., Eds. (2010): Mineralogy of Székelyland, Eastern Transylvania, Romania. Csík County Nature and Conservation Society, Miercurea-Ciuc, Romania, 321 pp.
  • Dalarna
    • Avesta
      • Möklinta ore field
No reference listed
  • Västmanland
    • Norberg
      • Getback ore field
Jansson, M. Förekomster med ceriummineral i stråket Möklinta, Norberg, Riddarhyttan och Nora.
Holtstam, D., Andersson, U.B. (2007): The REE minerals of the Bastnäs-type deposits, South-Central Sweden. Canadian Mineralogist. 45, 1073-1114
Holtstam, D., Andersson, U.B. (2007): The REE minerals of the Bastnäs-type deposits, South-Central Sweden. Canadian Mineralogist. 45, 1073-1114
No reference listed
      • Röberg ore field
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; Jansson, M. Förekomster med ceriummineral i stråket Möklinta, Norberg, Riddarhyttan och Nora.
      • Smörberg ore field
Holtstam, D., Andersson, U.B. (2007): The REE minerals of the Bastnäs-type deposits, South-Central Sweden. Canadian Mineralogist. 45, 1073-1114
Mineral and/or Locality is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © and the Hudson Institute of Mineralogy 1993-2018, except where stated. relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: March 21, 2018 03:20:52 Page generated: March 14, 2018 23:14:34
Go to top of page