Log InRegister
Quick Links : The Mindat ManualThe Rock H. Currier Digital LibraryMindat Newsletter [Free Download]
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic Time
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral Quiz
Photo SearchPhoto GalleriesSearch by ColorNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Keiviite-(Y)

A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
03752290014952219876351.jpg
Keiviite-(Y), etc.

Høgetveit Feldspar Quarries, Evje og Hornnes, Agder, Norway
01806480014977546065684.jpg
Keiviite-(Y), etc.

Stetind pegmatite, Narvik, Nordland, Norway
02751780014948262516613.jpg
Keiviite-(Y), etc.

Ploskaya Mt, Western Keivy Massif, Keivy Mountains, Lovozersky District, Murmansk Oblast, Russia
03814670014950475433142.jpg
Keiviite-(Y), etc.

Høgetveit Feldspar Quarries, Evje og Hornnes, Agder, Norway
07443040014949335769995.jpg
Keiviite-(Y), etc.

Stetind pegmatite, Narvik, Nordland, Norway
05050580014947373713132.jpg
Keiviite-(Y), etc.

Ploskaya Mt, Western Keivy Massif, Keivy Mountains, Lovozersky District, Murmansk Oblast, Russia
03814670014950475433142.jpg
Keiviite-(Y), etc.

Høgetveit Feldspar Quarries, Evje og Hornnes, Agder, Norway
01806480014977546065684.jpg
Keiviite-(Y), etc.

Stetind pegmatite, Narvik, Nordland, Norway
Hide all sections | Show all sections

About Keiviite-(Y)Hide

Formula:
Y2Si2O7
Colour:
Colorless to white
Lustre:
Vitreous
Hardness:
4 - 5
Specific Gravity:
4.45
Crystal System:
Monoclinic
Name:
Named for its relationship to keiviite-(Yb), with Y dominant over Yb and written according to the IMA nomenclature for rare earth element minerals.
Keiviite-(Y)-Keiviite-(Yb) Series.


Unique IdentifiersHide

Mindat ID:
2177
Long-form identifier:
mindat:1:1:2177:3
GUID
(UUID V4):
b31a2636-daeb-4249-8ec7-664fae3266c9

IMA Classification of Keiviite-(Y)Hide

Classification of Keiviite-(Y)Hide

Strunz-mindat (2024):
9.BC.05

9 : SILICATES (Germanates)
B : Sorosilicates
C : Si2O7 groups, without non-tetrahedral anions; cations in octahedral [6] and greater coordination
Dana 8th ed.:
55.2.1a.2

55 : SOROSILICATES Si2O7 Groups,Generally with no Additional Anions
2 : Si2O7 Groups, Generally with no Additional Anions with cations in [6] coordination
Hey's CIM Ref.:
14.8.2

14 : Silicates not Containing Aluminum
8 : Silicates of Group III metals other than Al

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
Kvi-YIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of Keiviite-(Y)Hide

Lustre:
Vitreous
Transparency:
Transparent
Colour:
Colorless to white
Streak:
white
Hardness:
4 - 5 on Mohs scale
Hardness:
VHN20=1400 kg/mm2 - Vickers
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
4.45 g/cm3 (Measured)    4.48 g/cm3 (Calculated)

Optical Data of Keiviite-(Y)Hide

Type:
Biaxial (-)
RI values:
nα = 1.713(1) nβ = 1.748(1) nγ = 1.758(1)
2V:
Measured: 55° to 56°, Calculated: 54°
Max Birefringence:
δ = 0.045
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
weak

Chemistry of Keiviite-(Y)Hide

Mindat Formula:
Y2Si2O7
Elements listed:
O, Si, Y - search for minerals with similar chemistry

Crystallography of Keiviite-(Y)Hide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 6.845(5) Å, b = 8.960(5) Å, c = 4.734(3) Å
β = 101.65(5)°
Ratio:
a:b:c = 0.764 : 1 : 0.528
Unit Cell V:
284.36 ų (Calculated from Unit Cell)
Z:
2
Comment:
Space group by analogy to keiviite-(Yb)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.23 Å(100)
4.65 Å(90)
3.04 Å(80)
2.280 Å(70)
5.40 Å(50)
2.729 Å(50)
2.692 Å(50)
1.841 Å(50)
1.685 Å(50)
Comments:
Mt. Ploskaya, Russia. Data from the type description.

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 4b: Highly evolved igneous rocks>3.0
34 : Complex granite pegmatites

Type Occurrence of Keiviite-(Y)Hide

Type Locality:
ⓘ Ploskaya Mt, Western Keivy Massif, Keivy Mountains, Lovozersky District, Murmansk Oblast, Russia
General Appearance of Type Material:
Prismatic crystals, 0.05 to 1 mm long and less than 0.15 mm thick.
Place of Conservation of Type Material:
Geology Museum, Kola Branch, Academy of Sciences, Apatity, Russia, 5958/6.
Mining Institute, St. Petersburg, Russia, 1343-1/1.
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia.
Geological Setting of Type Material:
Amazonite pegmatites.
Associated Minerals at Type Locality:
XenotimeKuliokite-(Y)Bastnäsite
Reference:
Voloshin, A.V., Pakhomovsky, Y.A., Tyusheva, F.N. (1985) Keiviite-(Y) - A new yttrian diorthosilicate, and thalenite from amazonite pegmatites of the Kola Peninsula. Diortho- and triorthosilicates of yttrium. Mineralogiceskij Zhurnal: 7: 79-94.

Synonyms of Keiviite-(Y)Hide

Other Language Names for Keiviite-(Y)Hide

Relationship of Keiviite-(Y) to other SpeciesHide

Member of:
Thortveitite Group
Other Members of this group:
Keiviite-(Yb)Yb2Si2O7Mon. 2/m : B2/m
ThortveititeSc2Si2O7Mon. 2/m : B2/m
Yttrialite-(Y)(Y,Th)2Si2O7Mon. 2/m : P21/m
Forms a series with:
Keiviite-(Yb)Keiviite-(Y)-Keiviite-(Yb) Series

Common AssociatesHide

Associated Minerals Based on Photo Data:
8 photos of Keiviite-(Y) associated with Tengerite-(Y)Y2(CO3)3 · 2-3H2O
8 photos of Keiviite-(Y) associated with Yttrofluorite(Ca1-xYx)F2+x where 0.05< x
6 photos of Keiviite-(Y) associated with Yttrialite-(Y)(Y,Th)2Si2O7
5 photos of Keiviite-(Y) associated with Iimoriite-(Y)Y2[SiO4][CO3]
5 photos of Keiviite-(Y) associated with Thalénite-(Y)Y3Si3O10F
5 photos of Keiviite-(Y) associated with Allanite-(Y)(CaY)(AlAlFe2+)O[Si2O7][SiO4](OH)
3 photos of Keiviite-(Y) associated with Keiviite-(Yb)Yb2Si2O7
3 photos of Keiviite-(Y) associated with FluoriteCaF2
3 photos of Keiviite-(Y) associated with Bastnäsite-(Ce)Ce(CO3)F
3 photos of Keiviite-(Y) associated with Vyuntspakhkite-(Y)(Y,Yb)4Al2.5-1.5(Si,Al)1.5-2.5(SiO4)4O(OH)7

Related Minerals - Strunz-mindat GroupingHide

9.BC.KozłowskiiteCa4Fe2+2Sn3(Si2O7)2(Si2O6OH)2Tric. 1
9.BC.Anorthoyttrialite-(Y)Y4(SiO4)(Si3O10)Tric. 1 : P1
9.BC.05GittinsiteCaZrSi2O7Mon. 2 : B2
9.BC.05Keiviite-(Yb)Yb2Si2O7Mon. 2/m : B2/m
9.BC.05ThortveititeSc2Si2O7Mon. 2/m : B2/m
9.BC.05Yttrialite-(Y)(Y,Th)2Si2O7Mon. 2/m : P21/m
9.BC.10Keldyshite(Na,H)2ZrSi2O7Tric. 1 : P1
9.BC.10KhibinskiteK2ZrSi2O7Mon. 2/m : B2/m
9.BC.10ParakeldyshiteNa2ZrSi2O7Tric. 1 : P1
9.BC.15RankiniteCa3Si2O7Mon. 2/m : P21/b
9.BC.20BarysilitePb8Mn2+[Si2O7]3Trig. 3m (3 2/m) : R3c
9.BC.25Edgarbaileyite[Hg2]2+3[Si2O7]Mon.
9.BC.30KristianseniteCa4Sc2Sn2(Si2O7)2(Si2O6OH)2Tric. 1
9.BC.30SilesiaiteCa4Fe3+2Sn2(Si2O7)2(Si2O6OH)2Tric. 1
9.BC.35Percleveite-(Ce)Ce2Si2O7Tet. 4 : P41
9.BC.35Percleveite-(La)La2Si2O7Tet. 4 : P41
9.BC.40ScottyiteBaCu2Si2O7Orth. mmm (2/m 2/m 2/m) : Pmna

Fluorescence of Keiviite-(Y)Hide

In UV light:
No fluorescence; yellow-green cathodoluminescence.

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.

Internet Links for Keiviite-(Y)Hide

References for Keiviite-(Y)Hide

Reference List:
Felsche, J. (1970) Crystal data on the polymorphic disilicate Y2Si2O7. Naturwissenschaften: 57: 127-128.
Voloshin, A.V., Pakhomovsky, Y.A., Tyusheva, F.N. (1985) Keiviite-(Y) - A new yttrian diorthosilicate, and thalenite from amazonite pegmatites of the Kola Peninsula. Diortho- and triorthosilicates of yttrium. Mineralogiceskij Zhurnal: 7: 79-94.
Hawthorne, Frank C., Burke, Ernst A. J., Ercit, T. Scott, Grew, Edward S., Grice, Joel D., Jambor, John L., Puziewicz, Jacek, Roberts, Andrew C., Vanko, David A. (1988) New Mineral Names. American Mineralogist, 73 (1-2) 189-199
Christensen, A.N., Hazell, R.G., Hewat, A.W. (1997) Synthesis, Crystal-Growth and Structure Investigations of Rare-Earth Disilicates and Rare-Earth Oxyapatites. Acta Chemica Scandinavica: 51: 37-43.
Leonyuk, N.I., Belokoneva, E.L., Bocelli, G., Righi, L., Shvanskii, E. V., Henrykhson, R.V., Kulman, N.V. and Kozhbakhteeva, D. E. (1999): High-temperature crystallization and X-ray characterization of Y2SiO5, Y2Si2O7 and LaBSiO5. J. Crystal Growth, 205, 361-367.
Redhammer, G.J., Roth, G. (2003) Beta-Y2Si2O7, a new thortveitite-type compound, determined at 100 and 280 K. Acta Crystallographica: C59: i103-i106. [neglects older literature]
Allix, M., Alba, M.D., Florian, P., Fernandez-Carrion, A.J., Suchomel, M.R., Escudero, A., Suard, E., Becerro, A.I. (2011) Structural elucidation of beta-(Y,Sc)2Si2O7: combined use of 89Y MAS NMR and powder diffraction. Journal of Applied Crystallography: 44: 846-852.
Kaindl, R., Többens, D.M., Kahlenberg, V. (2011) DFT-aided interpretation of the Raman spectra of the polymorphic forms of Y2Si2O7. Journal of Raman Spectroscopy: 42: 78-85.
(2023) Keiviite-(Y) Handbook of Mineralogy. Mineralogical Society of America

Localities for Keiviite-(Y)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 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). 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Austria
 
  • Lower Austria
    • Krems-Land District
      • Gföhl
        • Felling
Kolitsch, U. (2017): 2040) Diaspor, Keiviit-(Y), Margarit, Monazit-(Ce), Xenotim-(Y), Zirkon und weitere Mineralien in einer Korund-Almandin-Probe vom Latzenhof bei Felling im Waldviertel, Niederösterreich. Pp. 259-261 in Walter, F. et al. (2017): Neue Mineralfunde aus Österreich LXVI. Carinthia II, 207./127., 217-284.
Canada
 
BROSSEAU-LIARD, A. (2012) The nature and origin of REE and associated rare metal mineralization in the
Kazakhstan
 
  • Abai Region
    • Tarbagatai Range
      • Akzhaylyautas Mts (Akzhailyautas Mts; Akjaylautas Mts; Akzhalautas Mts)
Stepanov, A. V., Bekenova, G. K., Levin, V. L., Sokolova, E., Hawthorne, F. C., Dobrovol'skaya, E. A. (2012) Tarbagataite,(K,□)2(Ca,Na)(Fe2+,Mn)7Ti2(Si4O12)2O2(OH)4(OH,F), a new astrophyllite-group mineral species from the Verkhnee Espe deposit, Akjailyautas Mountains, Kazakhstan: description and crystal structure. The Canadian Mineralogist, 50 (1) 159-168 doi:10.3749/canmin.50.1.159
Norway
 
  • Agder
    • Evje og Hornnes
Henrich Neumann (1985) Norges Mineraler [The Minerals of Norway]. Norges geologiske Undersøkelse Skrifter Vol. 68. Universitetsforlaget
Raade, Gunnar (1988) Keiviitt-(Y) og abhuritt, to mineraler som aldri ble originalbeskrevet fra norske forekomster. Mineralogisk-Geologisk Museum - Universitetet i Oslo- Interne notater, Geologisk Museums venner. 139-140
    • Iveland
      • Ivedal
Bjørlykke, Knut (1934) The mineral paragenesis and classification of the granite pegmatites of Iveland, Setesdal, Southern Norway. Norsk Geologisk Tidsskrift [Norwegian Journal of Geology], 14 (3-4) 211-311
Nilssen, Borghild (1971) Yttrialite from Ivedal, Iveland, South Norway. Norsk Geologisk Tidsskrift [Norwegian Journal of Geology], 51 (1) 1-8
      • Kåbuland
Stensrud, S. (2009) De opptredende mineraler på granittpegmatittganger i Iveland og Evje. Unpublished paper based on 4 previous papers written together with Johan Løchen.
      • Rossås
Bjørlykke, Knut (1934) The mineral paragenesis and classification of the granite pegmatites of Iveland, Setesdal, Southern Norway. Norsk Geologisk Tidsskrift [Norwegian Journal of Geology], 14 (3-4) 211-311
Bjørlykke, Knut (1934) The mineral paragenesis and classification of the granite pegmatites of Iveland, Setesdal, Southern Norway. Norsk Geologisk Tidsskrift [Norwegian Journal of Geology], 14 (3-4) 211-311
    • Vennesla
      • Øvrebø
Griffin, William L., Nilssen, Borghild, Nilssen, Borghild (1979) Britholite (-Y) and its alteration: Reiarsdal, Vest-Agder, south Norway. Contributions to the mineralogy of Norway, No. 64. Norsk Geologisk Tidsskrift [Norwegian Journal of Geology], 59 (3) 265-271
  • Nordland
    • Hamarøy
      • Drag
        • Lapplægeret
Husdal, Tomas (2011) Tysfjordgranittens pegmatitter. STEIN. Magasin for populærgeologi, 38 (4) 4-35
    • Narvik
Husdal, Tomas (2008) The minerals of the pegmatites within the Tysfjord granite, northern Norway. Norsk Bergverksmuseum Skrift 38, 5-28
  • Svalbard
    • Spitsbergen
      • Hornsund
Pršek, Jaroslav, Majka, Jaroslaw, Uher, Pavel, Chudík, Peter (2010) Niobium-tantalum minerals in the Skoddefjellet NYF granitic pegmatite, Svalbard Archipelago, Norway: Primary versus secondary assemblage. Neues Jahrbuch für Mineralogie - Abhandlungen, 187 (3) 235-248 doi:10.1127/0077-7757/2010/0172
  • Vestfold og Telemark
    • Drangedal
      • Tørdal
Steffenssen, G. A. W. (2018) The distribution and enrichment of scandium in garnets from the Tørdal pegmatites, and its economic implications. Master's thesis, University of Oslo.
        • Heftetjern pegmatite
Steffenssen, G. A. W. (2018) The distribution and enrichment of scandium in garnets from the Tørdal pegmatites, and its economic implications. Master's thesis, University of Oslo.
Steffenssen, G. A. W. (2018) The distribution and enrichment of scandium in garnets from the Tørdal pegmatites, and its economic implications. Master's thesis, University of Oslo.
    • Nissedal
Steffenssen, G. A. W. (2018) The distribution and enrichment of scandium in garnets from the Tørdal pegmatites, and its economic implications. Master's thesis, University of Oslo.
Steffenssen, G. A. W. (2018) The distribution and enrichment of scandium in garnets from the Tørdal pegmatites, and its economic implications. Master's thesis, University of Oslo.
Poland
 
  • Lower Silesian Voivodeship
    • Dzierżoniów County
      • Piława Górna
        • DSS Piława Górna Quarry
Pieczka, Adam, Hawthorne, Frank C., Ma, Chi, Rossman, George R., Szełęg, Eligiusz, Szuszkiewicz, Adam, Turniak, Krzysztof, Nejbert, Krzysztof, Ilnicki, Sławomir, Buffat, Philippe, Rutkowski, Bogdan (2017) Żabińskiite, ideally Ca(Al0.5Ta0.5)(SiO4)O, a new mineral of the titanite group from the Piława Górna pegmatite, the Góry Sowie Block, southwestern Poland. Mineralogical Magazine, 81 (3) 591-610 doi:10.1180/minmag.2016.080.110
Pieczka, Adam, Bożena Gołębiowska, Piotr Jeleń, Adam Włodek, Eligiusz Szełęg, and Adam Szuszkiewicz. (2018) "Towards Zn-Dominant Tourmaline: A Case of Zn-Rich Fluor-Elbaite and Elbaite from the Julianna System at Piława Górna, Lower Silesia, SW Poland" Minerals 8, no. 4: 126. https://doi.org/10.3390/min8040126
Russia (TL)
 
  • Murmansk Oblast
    • Lovozersky District
      • Keivy Mountains
        • Western Keivy Massif
Voloshin A.V., Pakhomovskii Ya.A., Tyusheva F.N. [Волошин А.В., Пахомовский Я.А., Тюшева Ф.Н.] (1985): Kevyite-(Y) - a new yttrium diorthosilicate, and thalénite from amazonite pegmatites of the Kola Peninsula. Diortho- and triorthosilicates of yttrium [Кейвиит-(Y) – новый иттриевый диортосиликат и таленит из амазонитовых пегматитов Кольского полуострова. Диорто- и триортосиликаты иттрия]. Min. Zhurnal [Мин. Журнал], 7, 79-94 (in Russian)
Voloshin A.V., Pakhomovskii Ya.A. [Волошин А. В., Пахомовский Я. А.] (1986): Minerals and evolution of mineral formation in amazonite pegmatites of the Kola Peninsula [Минералы и эволюция минералообразования в амазонитовых пегматитах Кольского полуострова]. Nauka, Leningrad, 168 pp. (in Russian)
Pekov, Igor V. (1998) Minerals first discovered on the territory of the former Soviet Union. Ocean Pictures, Moscow. 369pp.
Sweden
 
  • Dalarna County
    • Borlänge
      • Stora Tuna
Radek Skoda, Inst Geol Sci, Masaryk Univ, Brno, Czech Republic
  • Stockholm County
    • Vaxholm
      • Resarö
Mineralogical Record (1987) 18 (5), 359-368
  • Värmland County
    • Filipstad
      • Persberg ore district
Kristiansen, Roy (1993) Thalenitt-liknende mineraler fra Åskagen, Sverige. STEIN. Nordisk magasin for populær geologi, 20 (1) 7-8
The Moon
 
  • Taurus-Littrow Valley
Carpenter P., Edmunson J., Cohen B.A., Zeigler R.A., and Jolliff B.L. (2011) FIRST LUNAR OCCURRENCE OF KEIVIITE-(Y) IN TROCTOLITIC ANORTHOSITE 76335, - 42nd Lunar and Planetary Science Conference
Quick NavTopAbout Keiviite-(Y)Unique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesRelationshipsCommon AssociatesStrunz-MindatFluorescence Other InformationInternet Links References Localities Locality List
 
Mineral and/or Locality  
Mindat Discussions Facebook Logo Instagram Logo Discord Logo
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2024, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: April 25, 2024 23:34:37 Page updated: January 5, 2024 09:30:07
Go to top of page