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Fukalite

Formula:
Ca
 
4
[CO
 
3
|(HSiO
 
4
)
 
2
]
System:OrthorhombicColour:pale brown, white
Hardness:4
Name:Named after its discovery locality.

Classification of Fukalite

IMA status:Approved 1976
Strunz 8th edition ID:8/B.22-80
Nickel-Strunz 10th (pending) edition ID:9.DQ.05

9 : SILICATES (Germanates)
D : Inosilicates
Q : Modular Inosilicate-Sorosilicate Structures
Dana 8th edition ID:78.4.3.1

78 : Unclassified Silicates
4 :
Hey's CIM Ref.:17.4.5

17 : Silicates Containing other Anions
4 : Silicates with carbonates
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Type Occurrence of Fukalite

Type Locality:Fuka mine, Bitchu-cho (Bicchu-cho), Takahashi, Okayama Prefecture, Chugoku Region, Honshu Island, Japan
Year of Discovery:1977

Physical Properties of Fukalite

Colour:pale brown, white
Streak:white
Hardness (Mohs):4

Crystallography of Fukalite

Crystal System:Orthorhombic
Cell Parameters:a = 5.48Å, b = 3.78Å, c = 23.42Å
Ratio:a:b:c = 1.45 : 1 : 6.196
Unit Cell Volume:V 485.13 ų (Calculated from Unit Cell)

Optical Data of Fukalite

Type:Biaxial (+/-)
RI values: nα = 1.595 nβ = 1.605 nγ = 1.626
2V:Measured: 90° , Calculated: 70°
Maximum Birefringence:δ = 0.031

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:r > v strong

Chemical Properties of Fukalite

Formula:
Ca
 
4
[CO
 
3
|(HSiO
 
4
)
 
2
]
Essential elements:C, Ca, H, O, Si
All elements listed in formula:C, Ca, H, O, Si
Common Impurities:Al,Fe,Mg,Na,K,P

Relationship of Fukalite to other Species

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
17.4.6Meionite
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
17.4.9Iimoriite-(Y)
Y
 
2
[CO
 
3
|SiO
 
4
]
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
)
 
6
(OH)
 
6
(CO
 
3
)
 
2
(SiO
 
4
)]
 
4
·48(H
 
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 Fukalite

Synonyms:
IMA1976-003
Other Languages:
German:Fukalit
Fukalith
Spanish:Fukalita

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 Fukalite

Reference List:Mineralogical Journal of Japan (1977): 8, 374-381.

American Mineralogist: 63: 793.

American Mineralogist, Volume 94, pages 323–333, 2009

Internet Links for Fukalite

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    Localities for Fukalite

    (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.
    Japan
     
    • Honshu Island
      • Chugoku Region
        • Hiroshima prefecture
    Alfredo Petrov - alfredo@mindat.org; American Mineralogist, Volume 94, pages 323–333, 2009
        • Okayama Prefecture
    Jan Bernard & Jaroslav Hyrsl (2004) Minerals and their Localities, p. 235
          • Takahashi
            • Bitchu-cho (Bicchu-cho)
    Mineralogical Journal of Japan (1977): 8, 374-381.
    Russia
     
    • Urals Region
      • Middle Urals
        • Ekaterinburgskaya (Sverdlovskaya) Oblast'
          • Sysert' District
            • Polevskoi (Polevskoi Zavod)
    American Mineralogist, Volume 94, pages 323–333, 2009
    Mineral and/or Locality
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