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Fukalite

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Formula:
Ca4[Si2O6][CO3](OH)2
Colour:
pale brown, white
Hardness:
4
Specific Gravity:
2.770
Crystal System:
Monoclinic
Name:
Named by Chiyoko Henmi, Isao Kusachi, Akira Kawahara, and Kitinosuke Henmi in 1997 after the type locality of Fuka Mine, Japan.
OD structure; six MDO polytypes are possible (Bonaccorsi et al., 2009).

See also Unnamed (Fukalite Dimorph).


Hide all sections | Show all sections

Classification of FukaliteHide

Approved
Approval Year:
1976
First Published:
1977
9.DQ.05

9 : SILICATES (Germanates)
D : Inosilicates
Q : Modular Inosilicate-Sorosilicate Structures
78.4.3.1

78 : Unclassified Silicates
4 :
17.4.5

17 : Silicates Containing other Anions
4 : Silicates with carbonates

Physical Properties of FukaliteHide

Colour:
pale brown, white
Streak:
white
Hardness:
Density:
2.770 g/cm3 (Measured)    2.77 g/cm3 (Calculated)

Optical Data of FukaliteHide

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

Formula:
Ca4[Si2O6][CO3](OH)2
IMA Formula:
Ca4Si2O6(CO3)(OH)2
Common Impurities:
Al,Fe,Mg,Na,K,P

Crystallography of FukaliteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P1 21/c 1
Cell Parameters:
a = 7.573(3) Å, b = 23.364(5) Å, c = 11.544(4) Å
β = 109.15(1)°
Ratio:
a:b:c = 0.324 : 1 : 0.494
Unit Cell V:
1,929.52 ų (Calculated from Unit Cell)
Comment:
Cell conforms to one of six possible MDO types. Originally described with orthrhombic cell (5.48, 3.78, 23.42 A).

Type Occurrence of FukaliteHide

Synonyms of FukaliteHide

Other Language Names for FukaliteHide

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

17.4.1TilleyiteCa5(Si2O7)(CO3)2Mon.
17.4.2SpurriteCa5(SiO4)2(CO3)Mon.
17.4.3ParaspurriteCa5(SiO4)2(CO3)Mon.
17.4.4ScawtiteCa7(Si3O9)2CO3 · 2H2OMon. 2/m
17.4.6MeioniteCa4Al6Si6O24CO3Tet. 4/m : I4/m
17.4.7Cancrinite(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2OHex. 6 : P63
17.4.8CarletoniteKNa4Ca4Si8O18(CO3)4(OH,F) · H2OTet. 4/mmm (4/m 2/m 2/m) : P4/mbm
17.4.9Iimoriite-(Y)Y2[SiO4][CO3]Tric.
17.4.10Kainosite-(Y)Ca2(Y,Ce)2(Si4O12)(CO3) · H2OOrth. mmm (2/m 2/m 2/m)
17.4.11Caysichite-(Y)Ca2Y2Si4O10(CO3)3 · 4H2OOrth. mm2
17.4.12Lepersonnite-(Gd)Ca(Gd,Dy)2(UO2)24(SiO4)4(CO3)8(OH)24 · 48H2O
17.4.13AshburtonitePb4Cu4(Si4O12)(HCO3)4(OH)3Cl · H2OTet.
17.4.14Surite(Pb,Ca)3(Al,Fe2+,Mg)2((Si,Al)4O10)(CO3)2(OH)2Mon.
17.4.15Tundrite-(Ce)Na2Ce2Ti(SiO4)(CO3)2O2Tric. 1 : P1
17.4.16Tundrite-(Nd)Na2(Nd,Ce)2Ti(SiO4)(CO3)2O2

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for FukaliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Mineralogical Journal of Japan (1977): 8, 374-381.
American Mineralogist: 63: 793.
Bonaccorsi, E., Merlino, S., Grabezhev, A.I., Zadov, A.E., Pertsev, N.N., Chukanov, N.V. (2009): Fukalite: an example of OD structure with two-dimensional disorder. American Mineralogist, 94, 323-333.

Internet Links for FukaliteHide

Localities for FukaliteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Australia
 
  • Tasmania
    • Huon Valley municipality
      • Huon-Channel region
        • Weld River district
Bottrill, MRT collection
Japan
 
  • Honshu Island
    • Chugoku Region
      • Hiroshima prefecture
        • Hiba-gun
American Mineralogist, Volume 94, pages 323–333, 2009
      • Okayama Prefecture
        • Ihara City (Ibara City)
          • Higashi-Mihara
Jan Bernard & Jaroslav Hyrsl (2004) Minerals and their Localities, p. 235
        • Takahashi City
          • Bicchu-cho (Bitchu-cho)
            • Fuka
Mineralogical Journal of Japan (1977): 8, 374-381.
Mexico
 
  • Michoacan
    • Mun. de Zitacuaro
Bernard, J.H. and Hyrsl, J. (2004) Minerals and their Localities. (Granit, Prague)
Romania
 
  • Hunedoara Co.
    • Hunedoara
Marincea, Ş., Dumitraş, D. G., Călin, N., Anason, A. M., Fransolet, A. M., & Hatert, F. (2013). Spurrite, tilleyite and associated minerals in the exoskarn zone from Cornet Hill (Metaliferi Massif, Apuseni Mountains, Romania). The Canadian Mineralogist, 51(3), 359-375.
Russia
 
  • Urals Region
    • Middle Urals
      • Sverdlovskaya Oblast'
        • Sysert' District
          • Polevskoi (Polevskoi Zavod)
American Mineralogist, Volume 94, pages 323–333, 2009; Grabezhev, A. I., Pertsev, N. N., Zadov, A. E., Pribavkin, S. V., & Murzin, V. V. (2007). Calcic hydrosilicate metasomatic rocks at the Gumeshevsk skarn-porphyry copper deposit in the central Urals, Russia. Petrology, 15(5), 514-522.
Mineral and/or Locality  
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