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Iimoriite-(Y)

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Suishoyama pegmatite (Suishouyama; Suisyoyama; Suishyoyama), Iizaka (Iisaka) Village, Kawamata, Fukushima Prefecture, Tohoku Region, Honshu Island, Japan

Show Iimoriite-(Y) Photos (17)



Formula:
Y
 
2
[SiO
 
4
][CO
 
3
]
System:TriclinicColour:Buff-tan
Hardness:5½ - 6
Name:The name is for Dr. S. Iimori and Dr. T. Iimori, who first described many rare earth minerals from the Fusamata pegmatite district.


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
[SiO
 
4
][CO
 
3
]
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
Ti(SiO
 
4
)(CO
 
3
)
 
2
O
 
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.15Spurrite
Ca
 
5
(SiO
 
4
)
 
2
(CO
 
3
)
9.AH.20Ternesite
Ca
 
5
(SiO
 
4
)
 
2
(SO
 
4
)
9.AH.25Britholite-(Ce)
Ca
 
2
(Ce,Ca)
 
3
(SiO
 
4
,PO
 
4
)
 
3
(OH,F)
9.AH.25Britholite-(Y)
Ca
 
2
(Y,Ca)
 
3
(SiO
 
4
,PO
 
4
)
 
3
(OH,F)
9.AH.25Ellestadite-(Cl)
Ca
 
10
(SiO
 
4
)
 
3
(SO
 
4
)
 
3
Cl
 
2
9.AH.25Fluorbritholite-(Ce)
Ca
 
2
(Ce,Ca)
 
3
(SiO
 
4
,PO
 
4
)
 
3
(F,OH)
9.AH.25Fluorellestadite
Ca
 
5
(SiO
 
4
)
 
1.5
(SO
 
4
)
 
1.5
F
9.AH.25Hydroxylellestadite
Ca
 
5
(SiO
 
4
)
 
1.5
(SO
 
4
)
 
1.5
(OH)
9.AH.25Mattheddleite
Pb
 
5
(SiO
 
4
)
 
1.5
(SO
 
4
)
 
1.5
(Cl,OH)
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
9.AH.25Fluorbritholite-(Y)
Ca
 
2
(Y,Ca,Ln)
 
3
(SiO
 
4
,PO
 
4
)
 
3
(F,OH)
Related Minerals - Hey's Index Grouping:

- +
17.4.1Tilleyite
Ca
 
5
(Si
 
2
O
 
7
)(CO
 
3
)
 
2
17.4.2Spurrite
Ca
 
5
(SiO
 
4
)
 
2
(CO
 
3
)
17.4.3Paraspurrite
17.4.4Scawtite
Ca
 
7
(Si
 
3
O
 
9
)
 
2
CO
 
3
 · 2H
 
2
O
17.4.5Fukalite
Ca
 
4
[Si
 
2
O
 
6
][CO
 
3
](OH)
 
2
17.4.6Meionite
Ca
 
4
Al
 
6
Si
 
6
O
 
24
CO
 
3
17.4.7Cancrinite
(Na,Ca,☐)
 
8
(Al
 
6
Si
 
6
O
 
24
)(CO
 
3
,SO
 
4
)
 
2
 · 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)
Ca
 
2
Y
 
2
Si
 
4
O
 
10
(CO
 
3
)
 
3
 · 4H
 
2
O
17.4.12Lepersonnite-(Gd)
Ca(Gd,Dy)
 
2
(UO
 
2
)
 
24
(SiO
 
4
)
 
4
(CO
 
3
)
 
8
(OH)
 
24
 · 48H
 
2
O
17.4.13Ashburtonite
Pb
 
4
Cu
 
4
(Si
 
4
O
 
12
)(HCO
 
3
)
 
4
(OH)
 
3
Cl · H
 
2
O
17.4.14Surite
(Pb,Ca)
 
3
(Al,Fe
2+
 
,Mg)
 
2
((Si,Al)
 
4
O
 
10
)(CO
 
3
)
 
2
(OH)
 
2
17.4.15Tundrite-(Ce)
Na
 
2
Ce
 
2
Ti(SiO
 
4
)(CO
 
3
)
 
2
O
 
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
Other Languages:
Japanese:飯盛石
Russian: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)

    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.
    Hide Locality List
    (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
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