Fukalite Mineral Data

Fukalite Mineral Data +

[Fine Minerals] [What's New] [Mineral Galleries] [My Collection] [Mineral Auctions]
Dan Weinrich Fine Minerals
Full-time professional mineral dealer with over 31 years experience in mineral collecting
And 15 years selling mineral specimens on the internet and at major mineral shows

General Fukalite Information

Chemical Formula:

Ca4Si2O6(CO3)(OH,F)2

Composition:

Molecular Weight = 408.49 gm

Calcium 39.24 % Ca 54.91 % CaO

Silicon 13.75 % Si 29.42 % SiO₂

Hydrogen 0.25 % H 2.21 % H₂O

Carbon 2.94 % C 10.77 % CO₂

Oxygen 39.17 % O

Fluorine 4.65 % F 4.65 % F

- % F -1.96 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₄Si₂O₆(CO₃)(OH)F

Environment:

Alteration product of spurrite in spurrite-gehlenite skarns.

IMA Status:

Approved IMA 1977

Locality:

Bicchu, Fuka, Okayama Prefecture, Japan. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Search for Fukalite Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Fukalite Crystallography

Axial Ratios:

a:b:c =1.4497:1:6.1957

Cell Dimensions:

a = 5.48, b = 3.78, c = 23.42, Z = 2; V = 485.13 Den(Calc)= 2.80

Crystal System:

OrthorhombicSpace Group: Unk

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.854(1), 3.084(0.9), 2.926(0.65),

Physical Properties of Fukalite

Color:

White, Light brown.

Density:

2.77

Diaphaniety:

Translucent

Habit:

Crystalline - Fine - Occurs as well-formed fine sized crystals.

Hardness:

4 - Fluorite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Fukalite

Gladstone-Dale:

CI meas= -0.052 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.041 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2174,KPDmeas= 0.2197,KC= 0.2089

Optical Data:

Biaxial (+/-), a=1.595, b=1.605, g=1.626, bire=0.0310, 2V(Calc)=70, 2V(Meas)=90.

Calculated Properties of Fukalite

Electron Density:

r_electron=2.80 gm/cc
note: r_Fukalite=2.80 gm/cc.

Fermion Index

Fermion Index = 0.00746
Boson Index = 0.99254

Photoelectric:

PE_Fukalite= 5.40 barns/electron
U=PE_Fukalite x r_electron= 15.10 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Fukalite is Not Radioactive

Fukalite Classification

Dana Class:

78.4.3.1 (78)Unclassified silicates

(78.4)possible inosilicates

(78.4.3)Dana Group

78.4.3.1 Fukalite Ca4Si2O6(CO3)(OH,F)2 Unk Ortho

Strunz Class:

VIII/B.22-80 VIII - Silicates

VIII/B - Nesosubsilicates, with anions unfamiliar to tetraheders, cationes with coordinationnumber between [8] and [12]

VIII/B.22 - Thaumasite series

VIII/B.22-10 Hatrurite Ca3SiO5 R 3m 3m

VIII/B.22-25 Poldervaartite (Ca,Mn)2SiO3(OH)2 P bca 2/m 2/m 2/m

VIII/B.22-30 Afwillite Ca3Si2O4(OH)6 P 2₁ 2

VIII/B.22-40 Bultfonteinite Ca2SiO2(OH,F)4 P1 1

VIII/B.22-50 Spurrite Ca5(SiO4)2(CO3) P 2₁/a 2/m

VIII/B.22-60 Paraspurrite Ca5(SiO4)2(CO3) P 2₁/a 2/m

VIII/B.22-65 Ternesite! Ca5(SiO4)2SO4 P nma 2/m 2/m 2/m

VIII/B.22-70 Nagelschmidtite Ca7(SiO4)3(PO4)2 Unk Hex

VIII/B.22-75 Harrisonite! Ca(Fe,Mg)6(PO4)2(SiO4)2 R 3m 3 2/m

VIII/B.22-80 Fukalite Ca4Si2O6(CO3)(OH,F)2 Unk Ortho

VIII/B.22-90 Thaumasite Ca3Si(CO3)(SO4)(OH)6·12(H2O) P 6₃/m 6/m

VIII/B.22-100 Chelyabinskite* (Ca,Mg)3Si(OH)6(SO4,CO3)2·9(H2O) Unk Ortho

Other Fukalite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

Search for Fukalite using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Fukalite :
AA Mineral Specimens
B and L Minerals
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Minernet.it
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Fukalite Mineral Data :

Ask about Fukalite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Fukalite Specimen Label here :

Fukalite

Ca4Si2O6(CO3)(OH,F)2
Dana No: 78.4.3.1 Strunz No: VIII/B.22-80
Locality:

Notes: