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Vyuntspakhkite-(Y)

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Formula:
Y(Al,Si)(SiO4)(OH,O)2
Colour:
Colourless
Lustre:
Adamantine
Hardness:
6 - 7
Name:
Named after the highest mountain (Mt. Vyuntspakhk) in the region of the type locality.
A very rare yttrium mineral in pegmatites.



Classification of Vyuntspakhkite-(Y)

Approved
Approval Year:
1982
9.BG.40

9 : SILICATES (Germanates)
B : Sorosilicates
G : Sorosilicates with mixed SiO4 and Si2O7 groups; cations in octahedral [6] and greater coordination
61.1.18.1

61 : CYCLOSILICATES Six-Membered Rings
1 : Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
16.13.1

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

Physical Properties of Vyuntspakhkite-(Y)

Adamantine
Diaphaneity (Transparency):
Transparent
Colour:
Colourless
Hardness (Mohs):
6 - 7

Optical Data of Vyuntspakhkite-(Y)

Type:
Biaxial (+)
RI values:
nα = 1.680 nβ = 1.692 nγ = 1.720
2V:
Measured: 68° , Calculated: 68°
Max Birefringence:
δ = 0.040
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r < v weak

Chemical Properties of Vyuntspakhkite-(Y)

IMA Formula:
Y(Al,Si)(SiO4)(OH,O)2
Elements listed in formula:

Crystallography of Vyuntspakhkite-(Y)

Morphology:
Microinclusions in yttrofluorite.

Type Occurrence of Vyuntspakhkite-(Y)

Relationship of Vyuntspakhkite-(Y) to other Species

9.BG.XCyprineCa19Cu2+(Al10Mg2)Si18O68(OH)10
9.BG.05bAllanite-(Ce)CaCeAl2Fe2+(Si2O7)(SiO4)O(OH)
9.BG.05bAllanite-(La)CaLaAl2Fe2+(Si2O7)(SiO4)O(OH)
9.BG.05bAllanite-(Y)CaYAl2Fe2+(Si2O7)(SiO4)O(OH)
9.BG.05aClinozoisiteCa2Al3(Si2O7)(SiO4)O(OH)
9.BG.05bDissakisite-(Ce)CaCeMgAl2(Si2O7)(SiO4)O(OH)
9.BG.05Dollaseite-(Ce)CaCeMg2Al(Si2O7)(SiO4)(OH)F
9.BG.05aEpidoteCa2Fe3+Al2(Si2O7)(SiO4)O(OH)
9.BG.05HancockiteCaPbFe3+Al2(Si2O7)(SiO4)O(OH)
9.BG.05Khristovite-(Ce)CaCeMgMn2+Al(Si2O7)(SiO4)(OH)F
9.BG.05MukhiniteCa2Al2V3+(Si2O7)(SiO4)O(OH)
9.BG.05PiemontiteCa2Mn3+Al2(Si2O7)(SiO4)O(OH)
9.BG.05Piemontite-(Sr)CaSrMn3+Al2(Si2O7)(SiO4)O(OH)
9.BG.05bManganiandrosite-(La)LaMn22+Mn3+Al(Si2O7)(SiO4)O(OH)
9.BG.05Tawmawite{Ca2}{(Al,Fe3+,Cr)3}(Si2O7)(SiO4)O(OH)
9.BG.05TweddilliteCaSrMn23+Al(Si2O7)(SiO4)O(OH)
9.BG.05bFerriallanite-(Ce)CaCeFe2+Fe3+Al(SiO4)(Si2O7)O(OH)
9.BG.05NiigataiteCaSrAl3(Si2O7)(SiO4)O(OH)
9.BG.05Manganiandrosite-(Ce)Mn2+Ce3+AlMn3+Mn2+(Si2O7)(SiO4)O(OH)
9.BG.05Dissakisite-(La)CaLaMgAl2(Si2O7)(SiO4)O(OH)
9.BG.05Vanadoandrosite-(Ce)Mn2+CeV3+AlMn2+O(Si2O7)(SiO4)(OH)
9.BG.05Uedaite-(Ce)Mn2+CeAl2Fe2+(Si2O7)(SiO4)O(OH)
9.BG.05Epidote-(Sr)CaSrFe3+Al2(Si2O7)(SiO4)O(OH)
9.BG.05bAllanite-(Nd)CaNdAl2Fe2+(Si2O7)(SiO4)O(OH)
9.BG.05bFerriallanite-(La)CaLaFe3+AlFe2+(SiO4)(Si2O7)O(OH)
9.BG.05bÅskagenite-(Nd)Mn2+NdAl2Fe3+(Si2O7)(SiO4)O2
9.BG.10ZoisiteCa2Al3(Si2O7)(SiO4)O(OH)
9.BG.15MacfalliteCa2Mn33+(SiO4)(Si2O7)(OH)3
9.BG.15SursassiteMn22+Al3(SiO4)(Si2O7)(OH)3
9.BG.20Julgoldite-(Fe2+)Ca2Fe2+Fe23+(Si2O7)(SiO4)(OH)2 · H2O
9.BG.20OkhotskiteCa2(Mn,Mg)(Mn3+,Al,Fe3+)2Si3(O,OH)14
9.BG.20Pumpellyite-(Fe2+)Ca2Fe2+Al2(SiO4)(Si2O7)(OH)2 · H2O
9.BG.20Pumpellyite-(Fe3+)Ca2(Fe3+,Mg)Al2(SiO4)(Si2O7)(OH,O)2 · H2O
9.BG.20Pumpellyite-(Mg)Ca2MgAl2(SiO4)(Si2O7)(OH)2 · H2O
9.BG.20Pumpellyite-(Mn2+)Ca2Mn2+Al2(SiO4)(Si2O7)(OH)2 · H2O
9.BG.20ShuiskiteCa2MgCr2(SiO4)(Si2O7)(OH)2 · H2O
9.BG.20Julgoldite-(Fe3+)Ca2Fe3+Fe23+(Si2O7)(SiO4)O(OH) · H2O
9.BG.20Pumpellyite-(Al)Ca2Al3(SiO4)(Si2O7)(OH,O)2 · H2O
9.BG.20PoppiiteCa2(V3+,Fe3+,Mg)V23+(Si,Al)3(O,OH)14
9.BG.20Julgoldite-(Mg)Ca2MgFe23+(Si2O7)(SiO4)(OH)2 · H2O
9.BG.25GanomalitePb3Ca2(SiO4)(Si2O7)
9.BG.30RustumiteCa10(Si2O7)2(SiO4)(OH)2Cl2
9.BG.35Vesuvianite(Ca,Na)19(Al,Mg,Fe)13(SiO4)10(Si2O7)4(OH,F,O)10
9.BG.35WiluiteCa19(Al,Mg)13(B,◻,Al)5(SiO4)10(Si2O7)4(O,OH)10
9.BG.35ManganvesuvianiteCa19Mn3+Al10Mg2(SiO4)10(Si2O7)4O(OH)9
9.BG.35FluorvesuvianiteCa19(Al,Mg)13(SiO4)10(Si2O7)4O(F,OH)9
9.BG.45DellaiteCa6(Si2O7)(SiO4)(OH)2
9.BG.50Gatelite-(Ce)(Ca,Ce)4(Al,Mg,Fe)4(Si2O7)(SiO4)3(O,F,OH)3
9.BG.55Västmanlandite-(Ce)Ce3CaMg2Al2Si5O19(OH)2F
16.13.2Törnebohmite-(Ce)Ce2Al(SiO4)2(OH)
16.13.3Törnebohmite-(La)La2Al(SiO4)2(OH)
16.13.4Allanite-(Y)CaYAl2Fe2+(Si2O7)(SiO4)O(OH)
16.13.5Allanite-(Ce)CaCeAl2Fe2+(Si2O7)(SiO4)O(OH)
16.13.6Dollaseite-(Ce)CaCeMg2Al(Si2O7)(SiO4)(OH)F
16.13.8Dissakisite-(Ce)CaCeMgAl2(Si2O7)(SiO4)O(OH)

Other Names for Vyuntspakhkite-(Y)

Name in Other Languages:

Other Information

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 Vyuntspakhkite-(Y)

Reference List:
Mineralogicheskii Zhurnal, Kiev (1983): 5(4): 89-94.

American Mineralogist (1984): 69: 1193.

A.V. Voloshin, Ya.A. Pakhomovskii (1986) Minerals and mineral formation evolution in amazonite pegmatites of Kola peninsula, - Leningrad, Nauka, pp.168 (in Russ.)

I.V.Pekov (1998) Minerals first discovered on the territory of the Former Soviet Union, - Moscow, Ocean Pictures, p. 235.

Yakbovich, O.V., and Steele, I.M. (2009): The crystal structure of vyuntspakhite: a redetermination. Crystallography Reports 54, 822-830.

Internet Links for Vyuntspakhkite-(Y)

mindat.org URL:
https://www.mindat.org/min-4222.html
Please feel free to link to this page.

Localities for Vyuntspakhkite-(Y)

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Norway
 
  • Nordland
    • Tysfjord
      • Drag
        • Lapplægeret
Husdal, T. (2008): The minerals of the pegmatites within the Tysfjord granite, northern Norway. Norsk Bergverksmuseum Skrift 38: 5-28
Husdal, T. (2008): The minerals of the pegmatites within the Tysfjord granite, northern Norway. Norsk Bergverksmuseum, skrift 38, 5-28.
Russia (TL)
 
  • Northern Region
    • Murmanskaja Oblast'
      • Kola Peninsula
        • Keivy Mountains
          • Western Keivy Massif
Voloshin A.V., Pakhomovskii Ya.A., Men’shikov Yu.P., Povarennykh A.S., Rogachev D.L. [Волошин А.В., Пахомовский Я.А., Меньшиков Ю.П., Поваренных А.С., Рогачев Д.Л.] (1983): Vyuntspakhkite, Y4Al2AlSi5O18(OH)5 - a new yttrium-aluminium silicate from amazonite pegmatite of the Kola Peninsula [Вюнцпахкит, Y4Al2AlSi5O18(OH)5 - новый иттрий-алюминиевый силикат из амазонитовых пегматитов Кольского полуострова]. Min. Zhurnal [Мин. Журнал], 5, 89-94 (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
    • Falun
No reference listed
Mineral and/or Locality  
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