SUPPORT US. Covid-19 has significantly affected our fundraising. Please help!
登录注册
主页关于 MindatMindat手册Mindat的历史版权Who We Are联系我们于 Mindat.org刊登广告
捐赠给 MindatCorporate Sponsorship赞助板页已赞助的板页在 Mindat刊登 广告的广告商于 Mindat.org刊登广告
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe Elements书籍及杂志
搜索矿物的性质搜索矿物的化学Advanced Locality Search随意显示任何一 种矿物Random Locality使用minID搜索邻近产地Search Articles搜索词汇表更多搜索选项
搜索:
矿物名称:
地区产地名称:
关键字:
 
Mindat手册添加新照片Rate Photos产区编辑报告Coordinate Completion Report添加词汇表项目
Mining Companies统计会员列表Mineral Museums矿物展及活动The Mindat目录表设备设置
照片搜索Photo GalleriesSearch by Color今天最新的照片昨天最新的照片用户照片相集过去每日精选照片相集Mineral Photography

Keiviite-(Y)

This page is currently not sponsored. Click here to sponsor this page.
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

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

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

Chemical Properties of Keiviite-(Y)Hide

Formula:
Y2Si2O7

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)

Geological EnvironmentHide

Paragenetic Mode(s):

Type Occurrence of Keiviite-(Y)Hide

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, 5958/6; Mining Institute, St. Petersburg, 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:
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

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

Common AssociatesHide

Associated Minerals Based on Photo Data:
5 photos of Keiviite-(Y) associated with Tengerite-(Y)Y2(CO3)3 · 2-3H2O
5 photos of Keiviite-(Y) associated with Yttrofluorite(Ca1-xYx)F2+x where 0.05< x
5 photos of Keiviite-(Y) associated with Allanite-(Y){CaY}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
4 photos of Keiviite-(Y) associated with Thalénite-(Y)Y3Si3O10F
4 photos of Keiviite-(Y) associated with Yttrialite-(Y)(Y,Th)2Si2O7
3 photos of Keiviite-(Y) associated with Iimoriite-(Y)Y2[SiO4][CO3]
3 photos of Keiviite-(Y) associated with Bastnäsite-(Ce)Ce(CO3)F
2 photos of Keiviite-(Y) associated with AmazoniteK(AlSi3O8)
2 photos of Keiviite-(Y) associated with Keiviite-(Yb)Yb2Si2O7
2 photos of Keiviite-(Y) associated with FluoriteCaF2

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)2Si2O7Mon. 2/m : P21/m
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[Hg2]2+3[Si2O7]Mon.
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•6H2OOrth. mm2 : Pmm2
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. 2/m : B2/b
14.8.13Cerite-(Ce)(Ce,Ca)9(Mg,Fe)(SiO4)3(HSiO4)4(OH)3Trig. 3m : R3c
14.8.14CascanditeCaScSi3O8(OH)Tric. 1

Fluorescence of Keiviite-(Y)Hide

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.

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
    • 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
 
  • 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.
Norway
 
  • 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
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
    • 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
  • Nordland
    • Hamarøy
      • Drag
        • Lapplægeret
Husdal, T. (2011): Tysfjordgranittens pegmatitter. Stein. 38 (4): 4-35
    • Narvik
Husdal, T. (2008): The minerals of the pegmatites within the Tysfjord granite, northern Norway. Norsk Bergverksmuseum, skrift 38, 5-28.
  • Svalbard
    • Spitsbergen
      • Hornsund
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
  • 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.
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.
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, 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
    • 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 I.V. (1998): Minerals first discovered on the territory of the former Soviet Union. Ocean Pictures, Moscow, 369 pp.
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 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
 
矿物 and/or 产地  
版权所有© mindat.org1993年至2020年,除了规定的地方。 Mindat.org全赖于全球数千个以上成员和支持者们的参与。
隐私政策 - 条款和条款细则 - 联络我们 Current server date and time: 2020.9.20 13:10:29 Page generated: 2020.8.26 23:32:31
Go to top of page