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Iimoriite-(Y)

Big Photo

Trimouns Talc Mine, Luzenac, Ariège, Midi-Pyrénées, France
© Joan Rosell

Show Iimoriite-(Y) Photos (11)
Formula:
Y
 
2
[CO
 
3
|SiO
 
4
]
System:TriclinicColour:Buff-tan
Hardness:5½ - 6


Slight reaction with cold HCl.

Classification of Iimoriite-(Y)

IMA status:Approved 1967
Strunz 8th edition ID:8/B.08-10
Nickel-Strunz 10th (pending) edition ID:9.AH.05

9 : SILICATES (Germanates)
A : Nesosilicates
H : Nesosilicates with CO3, SO4, PO4, etc.
Dana 8th edition ID:53.1.3.1

53 : NESOSILICATES Insular SiO4 Groups and Other Anions or Complex Cations
1 : Insular SiO4 Groups and Other Anions of Complex Cations with (CO3)
Hey's CIM Ref.:17.4.9

17 : Silicates Containing other Anions
4 : Silicates with carbonates
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Type Occurrence of Iimoriite-(Y)

Co-type Localities:Fusamata, Kawamata, Fukushima Prefecture, Tohoku Region, Honshu Island, Japan
Suishoyama pegmatite (Suishouyama; Suisyoyama; Suishyoyama), Iizaka (Iisaka) Village, Kawamata, Fukushima Prefecture, Tohoku Region, Honshu Island, Japan

Physical Properties of Iimoriite-(Y)

Lustre:Vitreous, Resinous
Diaphaneity (Transparency):Transparent
Colour:Buff-tan
Streak:White
Hardness (Mohs):5½ - 6
Cleavage:Distinct/Good
Density (measured):4.47 g/cm3
Density (calculated):4.36 g/cm3

Crystallography of Iimoriite-(Y)

Crystal System:Triclinic
Cell Parameters:a = 6.573Å, b = 6.651Å, c = 6.454Å
α = 116.44°, β = 92.34°, γ = 95.63°
Ratio:a:b:c = 0.988 : 1 : 0.97
Unit Cell Volume:V 250.3 ų
Z:2

Optical Data of Iimoriite-(Y)

Type:Biaxial (-)
RI values: nα = 1.753 nβ = 1.824 nγ = 1.830
2V:Measured: 31° , Calculated: 30°
Maximum Birefringence:δ = 0.077

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High
Dispersion:distinct to strong
Pleochroism:Non-pleochroic

Chemical Properties of Iimoriite-(Y)

Formula:
Y
 
2
[CO
 
3
|SiO
 
4
]
Essential elements:C, O, Si, Y
All elements listed in formula:C, O, Si, Y

Relationship of Iimoriite-(Y) to other Species

Related Minerals - Nickel-Strunz Grouping):
9.AH.10Tundrite-(Ce)
Na
 
2
Ce
 
2
TiO
 
2
(SiO
 
4
)(CO
 
3
)
 
2
9.AH.10Tundrite-(Nd)
Na
 
3
(Nd,La)
 
4
(Ti,Nb)
 
2
(SiO
 
4
)
 
2
(CO
 
3
)
 
3
O
 
4
(OH)·2H
 
2
O
9.AH.15Paraspurrite
Ca
 
5
[CO
 
3
|(SiO
 
4
)
 
2
]
9.AH.15Spurrite
Ca
 
5
[CO
 
3
|(SiO
 
4
)
 
2
]
9.AH.20Ternesite
Ca
 
5
[SO
 
4
|(SiO
 
4
)
 
2
]
9.AH.25Britholite-(Ce)
Ca
 
2
(Ce,Ca)
 
3
[(OH,F)|(SiO
 
4
,PO
 
4
)
 
3
]
9.AH.25Britholite-(Y)
Ca
 
2
(Y,Ca)
 
3
[(OH,F)|(SiO
 
4
,PO
 
4
)
 
3
]
9.AH.25Ellestadite-(Cl)
Ca
 
10
[Cl
 
2
|(SO
 
4
)
 
3
|(SiO
 
4
)
 
3
]
9.AH.25Fluorbritholite-(Ce)
Ca
 
2
(Ce,Ca)
 
3
[(F,OH)|(SiO
 
4
,PO
 
4
)
 
3
]
9.AH.25Ellestadite-(F)
Ca
 
10
[(F,Cl,OH)
 
2
|(SO
 
4
)
 
3
|(SiO
 
4
)
 
3
]
9.AH.25Ellestadite-(OH)
Ca
 
10
[(OH,Cl,F)
 
2
|(SO
 
4
)
 
3
|(SiO
 
4
)
 
3
]
9.AH.25Mattheddleite
Pb
 
5
(Si
 
1.2
S
 
1.8
)O
 
12
(Cl
 
0.6
OH
 
0.4
)
9.AH.25Tritomite-(Ce)
(Ce,La,Y,Th)
 
5
(Si,B)
 
3
(O,OH,F)
 
13
9.AH.25Tritomite-(Y)
(Y,Ca,La,Fe)
 
5
(Si,B,Al)
 
3
(O,OH,F)
 
13
9.AH.25Fluorcalciobritholite
(Ca,Ce)
 
5
 (SiO
 
4
,PO
 
4
)
 
3
F
Related Minerals - Hey's Index Grouping:
17.4.1Tilleyite
Ca
 
5
[(CO
 
3
)
 
2
|Si
 
2
O
 
7
]
17.4.2Spurrite
Ca
 
5
[CO
 
3
|(SiO
 
4
)
 
2
]
17.4.3Paraspurrite
Ca
 
5
[CO
 
3
|(SiO
 
4
)
 
2
]
17.4.4Scawtite
Ca
 
7
Si
 
6
(CO
 
3
)O
 
18
·2H
 
2
O
17.4.5Fukalite
Ca
 
4
[CO
 
3
|(HSiO
 
4
)
 
2
]
17.4.6Meionite
Ca
 
4
[CO
 
3
|(Al
 
2
Si
 
2
O
 
8
)
 
3
]
17.4.7Cancrinite
Na
 
6
Ca
 
2
[(CO
 
3
)
 
2
|Al
 
6
Si
 
6
O
 
24
] · 2H
 
2
O
17.4.8Carletonite
KNa
 
4
Ca
 
4
Si
 
8
O
 
18
(CO
 
3
)
 
4
(OH,F)·H
 
2
O
17.4.10Kainosite-(Y)
Ca
 
2
(Y,Ce)
 
2
Si
 
4
O
 
12
CO
 
3
·H
 
2
O
17.4.11Caysichite-(Y)
Y
 
2
(Ca,Gd)
 
2
Si
 
4
O
 
10
(CO
 
3
)
 
3
·4H
 
2
O
17.4.12Lepersonnite-(Gd)
CaO(Gd,Dy)
 
2
O
 
3
·24UO
 
3
·8CO
 
2
·4SiO
 
2
·60H
 
2
O
17.4.13Ashburtonite
Pb
 
4
Cu
 
4
[(OH)
 
3
|Cl|(HCO
 
3
)
 
4
|Si
 
4
O
 
12
] · H
 
2
O
17.4.14Surite
Pb(Pb,Ca)(CO
 
3
)
 
2
(Al,Fe,Mg)
 
2
(Si,Al)
 
4
O
 
10
(OH)
 
2
17.4.15Tundrite-(Ce)
Na
 
2
Ce
 
2
TiO
 
2
(SiO
 
4
)(CO
 
3
)
 
2
17.4.16Tundrite-(Nd)
Na
 
3
(Nd,La)
 
4
(Ti,Nb)
 
2
(SiO
 
4
)
 
2
(CO
 
3
)
 
3
O
 
4
(OH)·2H
 
2
O

Other Names for Iimoriite-(Y)

Synonyms:
IMA1967-033
Japanese names:
飯盛石
Russian names:
Иимориит-(Y)

Other Information

Fluorescence in UV light:none
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 Iimoriite-(Y)

Reference List:American Mineralogist (1920): 5: 140.

Kato, A. and Nagashima, K. (1970) In: Introduction to Japanese minerals, Geological Survey of Japan, 39: 85-86.

American Mineralogist (1973): 58: 140 (abstract).

Foord, E.E., Staatz, M.H., and Conklin, N.M. (1984) New data for iimoriite. American Mineralogist (1984): 69: 196-199.

Hughes, J.M., Foord, E.E., Jai-Nhuknan, ?., and Bell, J.M. (1996) The atomic arrangement of iimoriite-(Y), Y2(SiO4)(CO3). Canadian Mineralogist: 34: 817-820.

Internet Links for Iimoriite-(Y)

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    Localities for Iimoriite-(Y)

    (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.
    France
     
    • Midi-Pyrénées
      • Ariège
        • Luzenac
    		[Le Cahier des Micromonteurs 1990, 4, p.3,8-12]
    Japan
     
    • Honshu Island
      • Tohoku Region
        • Fukushima Prefecture
          • Kawamata
    		Introduction to Japanese Min.(1970), 39 and 85-86
            • Iizaka (Iisaka) Village
    		Am Min 69:196-199
    Norway
     
    • Nordland
      • Tysfjord
        • Drag
    		Gunnar Raade: Minerals of Norway - the complete inventory. Kongsberg Mineralsymposium 2007, Kongsberg 2007
    Sweden
     
    • Värmland
      • Filipstad
    		Kristiansen, Roy (1993): Thalenitt-liknende mineraler fra Åskagen, Sverige. STEIN 20 (19), 7-8 + 58-60
    USA
     
    • Alaska
      • Prince of Wales-Outer Ketchikan Borough
        • Prince of Wales Island
          • Bokan Mountain
    		Am Min 69:106-199
    Mineral and/or Locality
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