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About Shomiokite-(Y)Hide

Na3Y[CO3]3 · 3H2O
colourless, pink
Silky, Dull
2 - 3
Crystal System:
Named after its discovery near the Shomiok River.
This page provides mineralogical data about Shomiokite-(Y).

Classification of Shomiokite-(Y)Hide

Approval Year:

C : Carbonates without additional anions, with H2O
C : With rare earth elements (REE)

4 : AmBn(XO3)p·xH2O, with (m+n):p < 1:1

Physical Properties of Shomiokite-(Y)Hide

Silky, Dull
colourless, pink
2 - 3 on Mohs scale

Optical Data of Shomiokite-(Y)Hide

Biaxial (+)
RI values:
nα = 1.528 nβ = 1.529 nγ = 1.531
Measured: 39° to 49°, Calculated: 72°
Max Birefringence:
δ = 0.003
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:

Chemical Properties of Shomiokite-(Y)Hide

Na3Y[CO3]3 · 3H2O
IMA Formula:
Na3Y(CO3)3 · 3H2O

Crystallography of Shomiokite-(Y)Hide

Crystal System:

Type Occurrence of Shomiokite-(Y)Hide

Synonyms of Shomiokite-(Y)Hide

Other Language Names for Shomiokite-(Y)Hide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Aegirine10 photos of Shomiokite-(Y) associated with Aegirine on mindat.org.
Adamsite-(Y)8 photos of Shomiokite-(Y) associated with Adamsite-(Y) on mindat.org.
Gaidonnayite6 photos of Shomiokite-(Y) associated with Gaidonnayite on mindat.org.
Quartz3 photos of Shomiokite-(Y) associated with Quartz on mindat.org.
Lanthanite3 photos of Shomiokite-(Y) associated with Lanthanite on mindat.org.
Thomasclarkite-(Y)2 photos of Shomiokite-(Y) associated with Thomasclarkite-(Y) on mindat.org.
Fluorite2 photos of Shomiokite-(Y) associated with Fluorite on mindat.org.
Siderite2 photos of Shomiokite-(Y) associated with Siderite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

5.CC.05Donnayite-(Y)NaCaSr3Y(CO3)6 · 3H2OTric. 1 : P1
5.CC.05EwalditeBa(Na,Ca,Y,Ce,K)(CO3)2 · 2.6H2OHex. 6mm : P63mc
5.CC.05Mckelveyite-(Nd)(Ba,Sr)(Nd,Ce,La)(CO3)2 · 4-10H2OTric.
5.CC.05Mckelveyite-(Y)NaCaBa3Y(CO3)6 · 3H2OTric. 1 : P1
5.CC.05WeloganiteNa2Sr3Zr(CO3)6 · 3H2OTric. 1 : P1
5.CC.10Tengerite-(Y)Y2(CO3)3 · 2-3H2OOrth. mmm (2/m 2/m 2/m) : Pnnm
5.CC.15Kimuraite-(Y)Ca(Y,Nd)2(CO3)4 · 6H2OOrth.
5.CC.15Lokkaite-(Y)Ca(Y,Gd,Nd,Dy)4(CO3)7 · 9H2OOrth.
5.CC.25Calkinsite-(Ce)(Ce,La)2(CO3)3 · 4H2OOrth.
5.CC.25Lanthanite-(Ce)(Ce,La,Nd)2(CO3)3 · 8H2OOrth. mmm (2/m 2/m 2/m)
5.CC.25Lanthanite-(La)(La,Ce)2(CO3)3 · 8H2OOrth.
5.CC.25Lanthanite-(Nd)(Nd,La)2(CO3)3 · 8H2OOrth.
5.CC.30Adamsite-(Y)NaY[CO3]2 · 6H2OTric. 1 : P1
5.CC.35Decrespignyite-(Y)Cu(Y,REE)4(CO3)4(OH)5Cl · 2H2OMon.
5.CC.40Galgenbergite-(Ce)Ca(Ce,La,Nd)2(CO3)4 · H2OTric.

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 Shomiokite-(Y)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
KHOMYAKOV, A.P., SHUMYATSKAYA, N.G., and POLEZHAEVA, L.I. (1992) Shomiokite (Y) Na3Y(CO3)3.3H2O a new mineral. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 121, (6), 129 132 (in Russian). AbstracT: American Mineralogist (1994): 79: 765-766.
GRICE, J.D. (1996) The crystal structure of shomiokite (Y). Canadian Mineralogist, 34, 649-655.
RASTSVETAEVA, R.K., PUSHCHAROVSKY, D.Yu., and PEKOV, I.G. (1996) Crystal structure of shomiokite-(Y), Na3Y(CO3)3•3H2O European Journal of Mineralogy, 8, 1249-1255.

Internet Links for Shomiokite-(Y)Hide

Localities for Shomiokite-(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.
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
GRICE, J.D. (1996) The crystal structure of shomiokite (Y). Canadian Mineralogist, 34, 649-655. HORVÁTH, L., PFENNINGER HORVÁTH, E. (2000) I minerali di Mont-Saint-Hilaire (Québec, Canada) Rivista Mineralogica Italiana, 24, 140-202 (in Italian with English summary).
Russia (TL)
  • Murmansk Oblast
    • Lovozero Massif
      • Alluaiv Mt
        • Umbozero mine (Umbozerskii mine; Umba Mine)
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; Zap.Vses.Mineral.Obshch. 121(6), 129(1992)[Am. Min. 79,766](abstract); Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; Pekov, I.V. (2000): Lovozero Massif. Moscow, Ocean Pictures Ltd, 480 pp.
Mineral and/or Locality  
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