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Keiviite-(Y)

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Classification of Keiviite-(Y)Hide

Approved
9.BC.05

9 : SILICATES (Germanates)
B : Sorosilicates
C : Si2O7 groups, without non-tetrahedral anions; cations in octahedral [6] and greater coordination
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
14.8.2

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

Physical Properties of Keiviite-(Y)Hide

Hardness:
4 - 5 on Mohs scale

Optical Data of Keiviite-(Y)Hide

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

Chemical Properties of Keiviite-(Y)Hide

Formula:
Y2Si2O7

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
ThortveititeSc2Si2O7Mon.
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.05GittinsiteCaZrSi2O7Mon.
9.BC.05Keiviite-(Yb)Yb2Si2O7Mon. 2/m : B2/m
9.BC.05ThortveititeSc2Si2O7Mon.
9.BC.05Yttrialite-(Y)(Y,Th)2Si2O7
9.BC.10Keldyshite(Na,H)2ZrSi2O7Tric. 1 : P1
9.BC.10KhibinskiteK2ZrSi2O7Mon.
9.BC.10ParakeldyshiteNa2ZrSi2O7Tric.
9.BC.15RankiniteCa3Si2O7Mon. 2/m : P21/b
9.BC.20BarysilitePb8Mn2+[Si2O7]3Trig.
9.BC.25Edgarbaileyite(Hg-Hg)3Si2O7Mon.
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.1GittinsiteCaZrSi2O7Mon.
55.2.1a.3Keiviite-(Yb)Yb2Si2O7Mon. 2/m : B2/m
55.2.1a.4ThortveititeSc2Si2O7Mon.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.8.1Thalénite-(Y)Y3Si3O10FMon.
14.8.3Keiviite-(Yb)Yb2Si2O7Mon. 2/m : B2/m
14.8.4Tombarthite-(Y)Y4(Si,H4)4O12-x(OH)4+2xMon.
14.8.5ThortveititeSc2Si2O7Mon.
14.8.6Sazhinite-(Ce)Na2CeSi6O14•6H2O
14.8.7Monteregianite-(Y)(Na,K)6(Y,Ca)2Si16O38 · 10H2OMon. 2/m
14.8.8Iraqite-(La)KCa2(La,Ce,Th)Si8O20Tet.
14.8.9Ashcroftine-(Y)K5Na5(Y,Ca)12Si28O70(OH)2(CO3)8 · 8H2OTet. 4/mmm (4/m 2/m 2/m) : I4/mmm
14.8.10Nordite-(La)(La,Ce)(Sr,Ca)Na2(Na,Mn)(Zn,Mg)Si6O17
14.8.11Nordite-(Ce)(Ce,La)(Sr,Ca)Na2(Na,Mn)(Zn,Mg)Si6O17
14.8.12JervisiteNaSc3+Si2O6Mon.
14.8.13Cerite-(Ce)(Ce,Ca)9(Mg,Fe)(SiO4)3(HSiO4)4(OH)3Trig. 3m : R3c
14.8.14CascanditeCa(Sc,Fe3+)(HSi3O9)Tric.

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.
Austria
 
  • 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.
Canada
 
  • Québec & Newfoundland and Labrador
BROSSEAU-LIARD, A. (2012) The nature and origin of REE and associated rare metal mineralization in the
Kazakhstan
 
  • Eastern Kazakhstan Province (Shyghys Qazaqstan Oblysy; Vostochno-Kazakhstanskaya Oblast')
    • 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.
Norway
 
  • 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
      • 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. & Jensen, B.B. (1979): Britholite-(Y) and its alteration: Reiarsdal, Vest-Agder, south Norway. Norsk Geologisk Tidsskrift 59: 265-271
Poland
 
  • Lower Silesia (Dolnośląskie)
    • 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)
 
  • Northern Region
    • Murmanskaya 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.
Sweden
 
  • Dalarna
    • Borlänge
      • Stora Tuna
Radek Skoda, Inst Geol Sci, Masaryk Univ, Brno, Czech Republic
  • Uppland
    • 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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