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Yftisite-(Y)

A discredited species name
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09656870014950402264251.jpg
Yftisite-(Y), etc.

Ytterby, Resarö, Vaxholm, Stockholm County, Sweden
06783240017071193945467.jpg
Yftisite-(Y), etc.

Ytterby, Resarö, Vaxholm, Stockholm County, Sweden
00160240015118280767759.jpg
Yftisite-(Y)

Verkhnee Espe Massif, Akzhaylyautas Mts, Tarbagatai Range, Abai Region, Kazakhstan
09656870014950402264251.jpg
Yftisite-(Y), etc.

Ytterby, Resarö, Vaxholm, Stockholm County, Sweden
01201180017055402715392.jpg
Yftisite-(Y), etc.

Ytterby, Resarö, Vaxholm, Stockholm County, Sweden
08420860015118271179942.jpg
Yftisite-(Y)

Verkhnee Espe Massif, Akzhaylyautas Mts, Tarbagatai Range, Abai Region, Kazakhstan
09656870014950402264251.jpg
Yftisite-(Y), etc.

Ytterby, Resarö, Vaxholm, Stockholm County, Sweden
06783240017071193945467.jpg
Yftisite-(Y), etc.

Ytterby, Resarö, Vaxholm, Stockholm County, Sweden
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About Yftisite-(Y)Hide

Formula:
(Y,Dy,Er)4(Ti,Sn)(SiO4)2O(F,OH)6
Colour:
Light yellow
Lustre:
Resinous
Hardness:
3½ - 4
Name:
The name is derived from its composition: yttrium (Y), fluorine (F), titanium (Ti) and silicon (Si).
Originally reported from El'ozero REE occurrence, Western Keivy Massif, Kola Peninsula, Murmanskaja Oblast', Russia and Verkhnee Espe Massif, Tarbagatai Range, Semipalatinsk Oblysy, Kazakhstan.

A discredited mineral, but apparently valid since a crystal-structure determination was reported (Balko & Bakakin, 1975).

Identical to the later described mieite-(Y).


Unique IdentifiersHide

Mindat ID:
4360
Long-form identifier:
mindat:1:1:4360:7
GUID
(UUID V4):
50614818-cb7b-4f2a-8273-c1e2e9610955

IMA Classification of Yftisite-(Y)Hide

IMA status:
Discredited

Classification of Yftisite-(Y)Hide

Strunz-mindat (2024):
9.AG.25

9 : SILICATES (Germanates)
A : Nesosilicates
G : Nesosilicates with additional anions; cations in > [6] +- [6] coordination
Dana 8th ed.:
52.4.4.3

52 : NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
4 : Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
Hey's CIM Ref.:
17.1.20

17 : Silicates Containing other Anions
1 : Silicates with fluoride (not containing Al)

Physical Properties of Yftisite-(Y)Hide

Lustre:
Resinous
Transparency:
Transparent
Colour:
Light yellow
Hardness:
3½ - 4 on Mohs scale
Fracture:
Conchoidal

Optical Data of Yftisite-(Y)Hide

Type:
Biaxial (-)
RI values:
nα = 1.690 nβ = 1.705 nγ = 1.710 - 1.712
Max Birefringence:
δ = 0.020 - 0.022
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
strong

Chemistry of Yftisite-(Y)Hide

Mindat Formula:
(Y,Dy,Er)4(Ti,Sn)(SiO4)2O(F,OH)6
Elements listed:
Dy, Er, F, H, O, Si, Sn, Ti, Y - search for minerals with similar chemistry

Epitaxial Relationships of Yftisite-(Y)Hide

Epitaxial Minerals:
Thalénite-(Y)Y3Si3O10F

First Recorded Occurrence of Yftisite-(Y)Hide

Synonyms of Yftisite-(Y)Hide

Other Language Names for Yftisite-(Y)Hide

Common AssociatesHide

Associated Minerals Based on Photo Data:
4 photos of Yftisite-(Y) associated with Chlorite Group
3 photos of Yftisite-(Y) associated with CalciteCaCO3
1 photo of Yftisite-(Y) associated with Fergusonite-(Y)YNbO4

Related Minerals - Strunz-mindat GroupingHide

9.AG.Ivanyukite-Na-TNa2Ti4(SiO4)3(OH)O3 · 7H2OTrig. 3m : R3m
9.AG.Ivanyukite-Na-CNa2Ti4(SiO4)3(OH)2O2 · 6H2OIso. 4 3m : P4 3m
9.AG.EdgrewiteCa9(SiO4)4F2 Mon. 2/m : P21/b
9.AG.Aluminotaipingite-(CeCa)(Ce6Ca3)◻Al(SiO4)3[SiO3(OH)]4F3Trig. 3m : R3c
9.AG.02GatedaliteZrMn2+2Mn3+4SiO12Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
9.AG.2SkogbyiteZr(Mg2Mn3+4)SiO12Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
9.AG.05AbswurmbachiteCuMn3+6(SiO4)O8Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
9.AG.05BrauniteMn2+Mn3+6(SiO4)O8Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
9.AG.05NeltneriteCaMn3+6(SiO4)O8Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
9.AG.05Braunite-IICaMn3+14(SiO4)O20Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
9.AG.10LångbaniteMn2+4Mn3+9Sb5+O16(SiO4)2Trig. 3m : P3m1
9.AG.12Taipingite-(CeCa)(Ce7Ca2)◻Mg(SiO4)3[SiO3(OH)]4F3Trig. 3m : R3c
9.AG.15MalayaiteCaSn(SiO4)OMon. 2/m
9.AG.15TitaniteCaTi(SiO4)OMon. 2/m : P21/b
9.AG.15VanadomalayaiteCaV4+(SiO4)OMon. 2/m : B2/b
9.AG.15Natrotitanite(Na0.5Y0.5)Ti(SiO4)OMon. 2/m : B2/b
9.AG.15ŻabińskiiteCa[Al0.5(Ta,Nb)0.5)](SiO4)OTric. 1
9.AG.20Cerite-(CeCa)(Ce7Ca2)◻Mg(SiO4)3(SiO3OH)4(OH)3Trig. 3m : R3c
9.AG.20Ferricerite-(LaCa)(La6Ca3)◻Fe3+(SiO4)3(SiO3OH)4(OH)3Trig. 3m : R3c
9.AG.20Aluminocerite-(CeCa)(Ce6Ca3)◻Al(SiO4)3[SiO3(OH)]4(OH)3Trig. 3m : R3c
9.AG.20Nipeiite-(Ce)Ce9Fe3+(SiO4)6[SiO3(OH)](OH)3Trig. 3m : R3c
9.AG.25Trimounsite-(Y)Y2Ti2(SiO4)O5Mon. 2/m : P21/b
9.AG.25Mieite-(Y)Y4Ti(SiO4)2O[F,(OH)]6Orth. mmm (2/m 2/m 2/m) : Cmcm
9.AG.30SitinakiteKNa2Ti4(SiO4)2O5(OH) · 4H2OTet. 4/mmm (4/m 2/m 2/m) : P42/mcm
9.AG.35KittatinnyiteCa2Mn2Mn(SiO4)2(OH)4 · 9H2OHex.
9.AG.40aNatisiteNa2Ti(SiO4)OTet. 4/mmm (4/m 2/m 2/m)
9.AG.40bParanatisiteNa2Ti(SiO4)OOrth. mmm (2/m 2/m 2/m) : Pmma
9.AG.45Törnebohmite-(Ce)Ce2Al(SiO4)2(OH)Mon. 2/m : P21/b
9.AG.45Törnebohmite-(La)La2Al(SiO4)2(OH)
9.AG.50Kuliokite-(Y)Y4Al(SiO4)2(OH)2F5Tric. 1 : P1
9.AG.50Ivanyukite-NaNa2Ti4(SiO4)3(OH)2O2 · 6H2OTrig. 3m : R3m
9.AG.50Ivanyukite-KK2Ti4(SiO4)3(OH)2O2 · 9H2OIso. 4 3m : P4 3m
9.AG.50Ivanyukite-CuCuTi4(SiO4)3(OH)2O2 · 7H2OIso. 4 3m : P4 3m
9.AG.50HydroxyledgrewiteCa9(SiO4)4(OH)2 Mon. 2/m : P21/b
9.AG.52Ulfanderssonite-(Ce)(Ce15Ca)Σ16Mg2(SiO4)10(SiO3OH)(OH,F)5Cl3Mon. m : Bm
9.AG.55ChantaliteCaAl2(SiO4)(OH)4Tet. 4/m : I41/a
9.AG.60MozartiteCaMn3+(SiO4)(OH)Orth. 2 2 2 : P21 21 21
9.AG.60VuagnatiteCaAl(SiO4)(OH)Orth. 2 2 2 : P21 21 21
9.AG.65HatruriteCa3(SiO4)OTrig.
9.AG.70JasmunditeCa11(SiO4)4O2STet. 4 2m : I4m2
9.AG.75AfwilliteCa3(HSiO4)2 · 2H2OMon. m : Bb
9.AG.80BultfonteiniteCa2(HSiO4)F · H2OTric. 1 : P1
9.AG.85ZoltaiiteBaV4+2V3+12(SiO4)2O19Trig. 3 : P3
9.AG.90Tranquillityite(Fe2+,Ca)8(Zr,Y)2Ti3(SiO4)3O12Hex.

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 Yftisite-(Y)Hide

References for Yftisite-(Y)Hide

Localities for Yftisite-(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.
Japan
 
  • Mie Prefecture
    • Mie District
      • Komono town
        • Yunoyama-onsen
Matsubara et al. (2014) +1 other reference
  • Miyazaki Prefecture
    • Nobeoka City
Minakawa & Adachi (1994)
Kazakhstan (FRL)
 
  • Abai Region
    • Tarbagatai Range
      • Akzhaylyautas Mts (Akzhailyautas Mts; Akjaylautas Mts; Akzhalautas Mts)
Am Min 62 (1977) +1 other reference
Russia (FRL)
 
  • Murmansk Oblast
    • Lovozersky District
      • Keivy Mountains
        • Western Keivy Massif
American Mineralogist (1977) +1 other reference
Sweden
 
  • Stockholm County
    • Vaxholm
      • Resarö
Mineralogical Record (1987)
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