Shomiokite-(Y)
A valid IMA mineral species
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About Shomiokite-(Y)
Formula:
Na3Y[CO3]3 · 3H2O
Colour:
Colourless, pink, pale yellow
Lustre:
Waxy, Silky, Dull
Hardness:
2 - 3
Specific Gravity:
2.52
Crystal System:
Orthorhombic
Name:
Named after its discovery near the Shomiok River. The suffix/modifier indicates that the predominant essential REE is yttrium.
This page provides mineralogical data about Shomiokite-(Y).
Unique Identifiers
Mindat ID:
3639
Long-form identifier:
mindat:1:1:3639:5
GUID
(UUID V4):
(UUID V4):
dec5df9e-0330-4391-9444-53ed98825265
IMA Classification of Shomiokite-(Y)
Approved
IMA Formula:
Na3Y(CO3)3 · 3H2O
Approval year:
1990
First published:
1992
Classification of Shomiokite-(Y)
5.CC.20
5 : CARBONATES (NITRATES)
C : Carbonates without additional anions, with H2O
C : With rare earth elements (REE)
5 : CARBONATES (NITRATES)
C : Carbonates without additional anions, with H2O
C : With rare earth elements (REE)
15.4.7.1
15 : HYDRATED NORMAL CARBONATES
4 : AmBn(XO3)p·xH2O, with (m+n):p < 1:1
15 : HYDRATED NORMAL CARBONATES
4 : AmBn(XO3)p·xH2O, with (m+n):p < 1:1
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Shom-Y | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Shomiokite-(Y)
Waxy, Silky, Dull
Transparency:
Transparent, Translucent
Colour:
Colourless, pink, pale yellow
Streak:
White
Hardness:
2 - 3 on Mohs scale
Cleavage:
Perfect
{110}
{110}
Parting:
Parting on {001}
Density:
2.52(2) g/cm3 (Measured) 2.59 g/cm3 (Calculated)
Optical Data of Shomiokite-(Y)
Type:
Biaxial (+)
RI values:
nα = 1.528(2) nβ = 1.531(2) nγ = 1.531(2)
2V:
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.
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
none
Optical Extinction:
X = b, Y = c, Z = a.
Comments:
2Vmeas = 49° (red), 45° (yellow), 39° (blue).
Chemistry of Shomiokite-(Y)
Mindat Formula:
Na3Y[CO3]3 · 3H2O
Crystallography of Shomiokite-(Y)
Crystal System:
Orthorhombic
Class (H-M):
mm2 - Pyramidal
Cell Parameters:
a = 10.084(40) Å, b = 17.353(5) Å, c = 5.958(12) Å
Ratio:
a:b:c = 0.581 : 1 : 0.343
Unit Cell V:
1,042.58 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Short prismatic pseudohexagonal crystals, to 2 mm.
Comment:
Space Group: P bn21.
Crystal Structure
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Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0005499 | Shomiokite-(Y) | Grice J D (1996) The crystal structure of shomiokite-(Y) The Canadian Mineralogist 34 649-655 |  | 1996 | 0 | 293 | |
| 0006632 | Shomiokite-(Y) | Rastsvetaeva R K, Pushcharovsky D Y, Pekov I V (1996) Crystal structure of shomiokite-(Y), Na3Y(CO3)3*3H2O European Journal of Mineralogy 8 1249-1255 | 1996 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.076 Å | (100) |
| 2.858 Å | (70) |
| 4.85 Å | (65) |
| 6.53 Å | (55) |
| 5.05 Å | (50) |
| 2.597 Å | (50) |
| 2.229 Å | (50) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 35 : Ultra-alkali and agpaitic igneous rocks |
Type Occurrence of Shomiokite-(Y)
General Appearance of Type Material:
Irregular grains and short prismatic pseudo-hexagonal crystals up to 1-2 mm in diameter. Rosette-like aggregates are up to 3 mm.
Place of Conservation of Type Material:
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, r545/1.
The Natural History Museum, London, England, 1994,030.
The Natural History Museum, London, England, 1994,030.
Geological Setting of Type Material:
Among the interstices of potassium feldspar crystals in pegmatites.
Associated Minerals at Type Locality:
Reference:
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).
Synonyms of Shomiokite-(Y)
Other Language Names for Shomiokite-(Y)
Common Associates
Associated Minerals Based on Photo Data:
| 16 photos of Shomiokite-(Y) associated with Adamsite-(Y) | NaY[CO3]2 · 6H2O |
| 10 photos of Shomiokite-(Y) associated with Aegirine | NaFe3+Si2O6 |
| 8 photos of Shomiokite-(Y) associated with Lanthanite | |
| 6 photos of Shomiokite-(Y) associated with Gaidonnayite | Na2Zr(Si3O9) · 2H2O |
| 3 photos of Shomiokite-(Y) associated with Quartz | SiO2 |
| 2 photos of Shomiokite-(Y) associated with Thomasclarkite-(Y) | (Na,Ce)(Y,REE)(HCO3)(OH)3 · 4H2O |
| 2 photos of Shomiokite-(Y) associated with Fluorite | CaF2 |
| 2 photos of Shomiokite-(Y) associated with Siderite | FeCO3 |
| 2 photos of Shomiokite-(Y) associated with Franconite | Na(Nb2O5)(OH) · 3H2O |
| 2 photos of Shomiokite-(Y) associated with Microcline | K(AlSi3O8) |
Related Minerals - Strunz-mindat Grouping
| 5.CC. | Alicewilsonite-(YCe) | Na2Sr2YCe(CO3)6 · 3H2O |
| 5.CC. | Alicewilsonite-(YLa) | Na2Sr2YLa(CO3)6 · 3H2O |
| 5.CC. | Yuchuanite-(Y) | Y2(CO3)3 · H2O |
| 5.CC. | Bainbridgeite-(NdCe) | Na2Ba2NdCe(CO3)6 · 3H2O |
| 5.CC.05 | Donnayite-(Y) | NaCaSr3Y(CO3)6 · 3H2O |
| 5.CC.05 | Ewaldite | Ba(Na,Ca,Y,Ce,K)(CO3)2 · 2.6H2O |
| 5.CC.05 | Mckelveyite-(Nd) | NaCaBa3Nd(CO3)6 · 3H2O |
| 5.CC.05 | Mckelveyite-(Y) | NaCaBa3Y(CO3)6 · 3H2O |
| 5.CC.05 | Weloganite | Na2Sr3Zr(CO3)6 · 3H2O |
| 5.CC.05 | Unnamed (MSH UK-37A) | Sr3NaCaY(CO3)6 · 3H2O |
| 5.CC.05 | UM1992-05-CO:CaCeLaNaSr | (Sr,Na,Y,REE,Ca,Ba)2(CO3)2 · H2O |
| 5.CC.05 | Bainbridgeite-(YCe) | Na2Ba2YCe(CO3)6 · 3H2O |
| 5.CC.10 | Tengerite-(Y) | Y2(CO3)3 · 2-3H2O |
| 5.CC.15 | Kimuraite-(Y) | Ca(Y,Nd)2(CO3)4 · 6H2O |
| 5.CC.15 | Lokkaite-(Y) | Ca(Y,Gd,Nd,Dy)4(CO3)7 · 9H2O |
| 5.CC.15 | Hizenite-(Y) | Ca2Y6(CO3)11 · 14H2O |
| 5.CC.25 | Calkinsite-(Ce) | (Ce,La)2(CO3)3 · 4H2O |
| 5.CC.25 | Lanthanite-(Ce) | (Ce,La,Nd)2(CO3)3 · 8H2O |
| 5.CC.25 | Lanthanite-(La) | (La,Ce)2(CO3)3 · 8H2O |
| 5.CC.25 | Lanthanite-(Nd) | (Nd,La)2(CO3)3 · 8H2O |
| 5.CC.30 | Adamsite-(Y) | NaY[CO3]2 · 6H2O |
| 5.CC.35 | Decrespignyite-(Y) | Cu(Y,REE)4(CO3)4(OH)5Cl · 2H2O |
| 5.CC.40 | Galgenbergite-(Ce) | Ca(Ce,La,Nd)2(CO3)4 · H2O |
| 5.CC.45 | Lecoqite-(Y) | Na3Y(CO3)3 · 6H2O |
Other Information
IR Spectrum:
Absorption bands at 675, 730, 880, 1020, 1065, 1385, 1515, and 1560 cm-1.
Notes:
Soluble with effervescence in dilute acids.
Becomes turbid and dehydrates on heating.
Becomes turbid and dehydrates on heating.
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 Shomiokite-(Y)
mindat.org URL:
https://www.mindat.org/min-3639.html
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References for Shomiokite-(Y)
Reference List:
Khomyakov, A. P., Shumyatskaya, N. G., Polezhaeva, L. T. (1992) Shomiokite-(Y), Na3Y(CO3)3·3H2O: a new mineral. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva, 121 (6) 129-132
Grice, Joel D. (1996) The crystal structure of shomiokite-(Y) The Canadian Mineralogist, 34 (3) 649-655
Localities for Shomiokite-(Y)
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Canada | |
| Grice (1996) +1 other reference |
Russia (TL) | |
| Zap.Vses.Mineral.Obshch. 121 (6) +3 other references |
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Shomiokitovoe pegmatite, Umbozero mine, Alluaiv Mountain, Lovozersky District, Murmansk Oblast, Russia