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About Keiviite-(Y)Hide

Classification of Keiviite-(Y)Hide


9 : SILICATES (Germanates)
B : Sorosilicates
C : Si2O7 groups, without non-tetrahedral anions; cations in octahedral [6] and greater coordination

55 : SOROSILICATES Si2O7 Groups,Generally with no Additional Anions
2 : Si2O7 Groups, Generally with no Additional Anions with cations in [6] coordination

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

Physical Properties of Keiviite-(Y)Hide

4 - 5 on Mohs scale

Optical Data of Keiviite-(Y)Hide

Biaxial (-)
RI values:
nα = 1.713 nβ = 1.748 nγ = 1.758
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:

Chemical Properties of Keiviite-(Y)Hide


Type Occurrence of Keiviite-(Y)Hide

Synonyms of Keiviite-(Y)Hide

Other Language Names for Keiviite-(Y)Hide

Relationship of Keiviite-(Y) to other SpeciesHide

Other Members of this group:
Keiviite-(Yb)Yb2Si2O7Mon. 2/m : B2/m
Forms a series with:

Common AssociatesHide

Associated Minerals Based on Photo Data:
Tengerite-(Y)5 photos of Keiviite-(Y) associated with Tengerite-(Y) on mindat.org.
Yttrofluorite5 photos of Keiviite-(Y) associated with Yttrofluorite on mindat.org.
Allanite-(Y)5 photos of Keiviite-(Y) associated with Allanite-(Y) on mindat.org.
Thalénite-(Y)4 photos of Keiviite-(Y) associated with Thalénite-(Y) on mindat.org.
Yttrialite-(Y)4 photos of Keiviite-(Y) associated with Yttrialite-(Y) on mindat.org.
Iimoriite-(Y)3 photos of Keiviite-(Y) associated with Iimoriite-(Y) on mindat.org.
Bastnäsite-(Ce)3 photos of Keiviite-(Y) associated with Bastnäsite-(Ce) on mindat.org.
Amazonite2 photos of Keiviite-(Y) associated with Amazonite on mindat.org.
Keiviite-(Yb)2 photos of Keiviite-(Y) associated with Keiviite-(Yb) on mindat.org.
Fluorite2 photos of Keiviite-(Y) associated with Fluorite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.BC.05Keiviite-(Yb)Yb2Si2O7Mon. 2/m : B2/m
9.BC.10Keldyshite(Na,H)2ZrSi2O7Tric. 1 : P1
9.BC.15RankiniteCa3Si2O7Mon. 2/m : P21/b
9.BC.30KristianseniteCa2ScSn(Si2O7)(Si2O6OH)Tric. 1
9.BC.35Percleveite-(Ce)(Ce,La,Nd)2Si2O7Tet. 4

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

55.2.1a.3Keiviite-(Yb)Yb2Si2O7Mon. 2/m : B2/m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.8.3Keiviite-(Yb)Yb2Si2O7Mon. 2/m : B2/m
14.8.7Monteregianite-(Y)(Na,K)6(Y,Ca)2Si16O38 · 10H2OMon. 2/m
14.8.9Ashcroftine-(Y)K5Na5(Y,Ca)12Si28O70(OH)2(CO3)8 · 8H2OTet. 4/mmm (4/m 2/m 2/m) : I4/mmm
14.8.13Cerite-(Ce)(Ce,Ca)9(Mg,Fe)(SiO4)3(HSiO4)4(OH)3Trig. 3m : R3c
14.8.14CascanditeCa(Sc,Fe3+)(HSi3O9)Tric. 1

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 Keiviite-(Y)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Felsche, J. (1970): Crystal data on the polymorphic disilicate Y2Si2O7. Naturwiss., 57, 127-128.
American Mineralogist (1988): 73: 191-192.
Christensen, A. N., Hazell, R. G. and 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 Crystallogr. C59, i103-i106. [neglects older literature]
M. Allix, M. D. Alba, P. Florian, A. J. Fernandez-Carrion, M. R. Suchomel, A. Escudero, E. Suard and A. I. Becerro (2011): Structural elucidation of beta-(Y,Sc)2Si2O7: combined use of 89Y MAS NMR and powder diffraction. J. Appl. Crystallogr. 44, 846-852.

Internet Links for Keiviite-(Y)Hide

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 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.
  • Lower Austria
    • Waldviertel
      • 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.
  • Québec & Newfoundland and Labrador
BROSSEAU-LIARD, A. (2012) The nature and origin of REE and associated rare metal mineralization in the
  • East Kazakhstan
    • Tarbagatai Range
      • Akzhaylyautas Mts (Akzhailyautas Mts; Akjaylautas Mts; Akzhalautas Mts)
STEPANOV, A.V., BEKENOVA, G.K., LEVIN, V.L., 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 Canadian Mineralogist 50,159-168.
  • Aust-Agder
    • Evje og Hornnes
Neumann, H. (1985): Norges Mineraler. Norges geologiske Undersøkelse Skrifter 68 + Pers. commentary Gunnar Raade 1988
    • Iveland
      • Ivedal
Bjørlykke, H. (1934): The Mineral Paragenesis and Classification of the Granite Pegmatites of Iveland, Setesdal, Southern Norway. Norsk Geologisk Tidsskrift 14, 211-311 ; Nilssen, B. (1971): Yttrialite from Ivedal, Iveland, South Norway. Norsk Geologisk Tidsskrift 51, 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 (Rosås)
Bjørlykke, H.( 1934): The Mineral Paragenesis and Classification of the Granite Pegmatites of Iveland, Setesdal, Southern Norway. Norsk Geologisk Tidsskrift 14, 211-311
Bjørlykke, H.( 1934): The Mineral Paragenesis and Classification of the Granite Pegmatites of Iveland, Setesdal, Southern Norway. Norsk Geologisk Tidsskrift 14, 211-311
  • Nordland
    • Tysfjord
      • Drag
        • Lapplægeret
Husdal, T. (2011): Tysfjordgranittens pegmatitter. Stein. 38 (4): 4-35
Husdal, T. (2008): The minerals of the pegmatites within the Tysfjord granite, northern Norway. Norsk Bergverksmuseum, skrift 38, 5-28.
  • Svalbard
    • Spitsbergen
      • Hornsund fjord
Pršek, J., Majka, J., Uher, P. & Chudík, P. (2010): Niobium-tantalum minerals in the Skoddefjellet NYF granitic pegmatite, Svalbard Archipelago, Norway: Primary versus secondary assemblage. Neues Jahrbuch für Mineralogie - Abhandlungen 187, 235-248
  • Vest-Agder
    • Vennesla
      • Øvrebø
Griffin, W.L., Nilssen, B. and Jensen, B.B. (1979) Britholite-(Y) and its alteration: Reiarsdal, Vest-Agder, south Norway. Norsk Geologisk Tidsskrift 59: 265-271
  • Lower Silesia
    • Dzierżoniów District
      • Piława Górna (Ober Peilau; Gnadenfrei)
        • DSS Piława Górna Quarry
Pieczka, A., Hawthorne, F.C., Ma, C., Rossman, G.R., Szełęg, E., Szuszkiewicz, A., Turniak, K., Nejbert, K., Ilnicki, S.S., Buffat, P., Rutkowski, B. (2016): 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: 80: (in press
Russia (TL)
  • Murmansk Oblast
    • 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 I.V. (1998): Minerals first discovered on the territory of the former Soviet Union. Ocean Pictures, Moscow, 369 pp.
  • Dalarna
    • Borlänge
      • Stora Tuna
Radek Skoda, Inst Geol Sci, Masaryk Univ, Brno, Czech Republic
  • Stockholm
    • Vaxholm
      • Resarö
Mineralogical Record (1987) 18 (5), 359-368
  • Värmland
    • Filipstad
      • Persberg district
Kristiansen, Roy (1993): Thalenitt-liknende mineraler fra Åskagen, Sverige. STEIN 20 (1), 7-8 + 58-60
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
Mineral and/or Locality  
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