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Shomiokite-(Y)

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Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada

Show Shomiokite-(Y) Photos (20)
Formula:
Na
 
3
Y[CO
 
3
]
 
3
 · 3H
 
2
O
System:OrthorhombicColour:colourless, pink
Hardness:2 - 3
Name:Named after its discovery near the Shomiok River.
This page provides mineralogical data about Shomiokite-(Y).

Classification of Shomiokite-(Y)

IMA status:Approved 1990
Strunz 8th edition ID:5/D.03-05
Nickel-Strunz 10th (pending) edition ID:5.CC.20

5 : CARBONATES (NITRATES)
C : Carbonates without additional anions, with H2O
C : With rare earth elements (REE)
Dana 8th edition ID:15.4.7.1

15 : HYDRATED NORMAL CARBONATES
4 : AmBn(XO3)p·xH2O, with (m+n):p < 1:1
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Type Occurrence of Shomiokite-(Y)

Type Locality:Unnamed pegmatites, Alluaiv Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia

Physical Properties of Shomiokite-(Y)

Lustre:Silky, Dull
Diaphaneity (Transparency):Transparent
Colour:colourless, pink
Streak:white
Hardness (Mohs):2 - 3
Cleavage:Perfect

Crystallography of Shomiokite-(Y)

Crystal System:Orthorhombic

Optical Data of Shomiokite-(Y)

Type:Biaxial (+)
RI values: nα = 1.528 nβ = 1.529 nγ = 1.531
2V:Measured: 39° to 49°, Calculated: 72°
Maximum Birefringence:δ = 0.003

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low
Dispersion:none

Chemical Properties of Shomiokite-(Y)

Formula:
Na
 
3
Y[CO
 
3
]
 
3
 · 3H
 
2
O
Essential elements:C, H, Na, O, Y
All elements listed in formula:C, H, Na, O, Y

Relationship of Shomiokite-(Y) to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
5.CC.05Donnayite-(Y)
Sr
 
3
NaCaY(CO
 
3
)
 
6
·3H
 
2
O
5.CC.05Ewaldite
Ba(Ca,Y,Na,K)(CO
 
3
)
 
2
5.CC.05Mckelveyite-(Nd)
(Ba,Sr)(Nd,Ce,La)(CO
 
3
)
 
2
·4-10H
 
2
O
5.CC.05Mckelveyite-(Y)
Ba
 
3
Na(Ca,U)Y(CO
 
3
)
 
6
·3H
 
2
O
5.CC.05Weloganite
Sr
 
3
Na
 
2
Zr(CO
 
3
)
 
6
·3H
 
2
O
5.CC.10Tengerite-(Y)
Y
 
2
[CO
 
3
]
 
3
 · 2-3H
 
2
O
5.CC.15Kimuraite-(Y)
Ca(Y,Nd)
 
2
[CO
 
3
]
 
4
 · 6H
 
2
O
5.CC.15Lokkaite-(Y)
Ca(Y,Gd,Nd,Dy)
 
4
[CO
 
3
]
 
7
 · 9H
 
2
O
5.CC.25Calkinsite-(Ce)
(Ce,La)
 
2
[CO
 
3
]
 
3
 · 4H
 
2
O
5.CC.25Lanthanite-(Ce)
(Ce,La,Nd)
 
2
[CO
 
3
]
 
3
 · 8H
 
2
O
5.CC.25Lanthanite-(La)
(La,Ce)
 
2
[CO
 
3
]
 
3
 · 8H
 
2
O
5.CC.25Lanthanite-(Nd)
(Nd,La)
 
2
[CO
 
3
]
 
3
 · 8H
 
2
O
5.CC.30Adamsite-(Y)
NaY[CO
 
3
]
 
2
 · 6H
 
2
O
5.CC.35Decrespignyite-(Y)
Cu(Y,REE)
 
4
(CO
 
3
)
 
4
Cl(OH)
 
5
·2H
 
2
O
5.CC.40Galgenbergite-(Ce)
Ca(Ce,La,Nd)
 
2
[CO
 
3
]
 
4
 · H
 
2
O

Other Names for Shomiokite-(Y)

Synonyms:
IMA1990-015ShomiokiteShomyokiteShomyokite-(Y)
Other Languages:
German:Shomiokit
Shomyokit
Russian:Шомиокит-(Y)
Spanish:Shomiokita
Shomyokita

Other Information

Health Warning: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)

Reference List:American Mineralogist (1994): 79: 765-766.

Canadian Mineralogist (1996): 34: 649-655.

Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 121(6): 129-132.

Internet Links for Shomiokite-(Y)

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    Localities for Shomiokite-(Y)

    Hide Locality List
    The 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. ? 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.
    Canada
     
    • Québec
      • Montérégie
        • Rouville RCM
          • Mont Saint-Hilaire
    		CanMin 34:649-655(1996)
    Russia
     
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Lovozero Massif
            • Alluaiv Mt
              • Umbozero Mine
    		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. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    Mineral and/or Locality
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