Bicchulite Mineral Data

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General Bicchulite Information

Chemical Formula:

Ca2Al2SiO6(OH)2

Composition:

Molecular Weight = 292.22 gm

Calcium 27.43 % Ca 38.38 % CaO

Aluminum 18.47 % Al 34.89 % Al₂O₃

Silicon 9.61 % Si 20.56 % SiO₂

Hydrogen 0.69 % H 6.17 % H₂O

Oxygen 43.80 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₂Al₂SiO₆(OH)₂

Environment:

In skarns in limestones, formed through alteration of gehlenite subjected to later retrograde hydration reactions.

IMA Status:

Approved IMA 1973

Locality:

From Fuka, near Bicchu, Okayama Prefecture, and in the Akagane mine, Iwate Prefecture, Japan. Link to MinDat.org Location Data.

Name Origin:

For Bicchu, the town encompassing the Japanese type locality.

Name Pronunciation:

Bicchulite + Pronunciation

Synonym:

ICSD 100179

PDF 27-66

Bicchulite Image

Images:

Bicchulite

Comments: White microcrystalline bicchulite associated with calcite and vesuvianite.
Location: Fuka Mine, Bitchu-Cho, Okayama Prefecture, Chugoku Region, Honshu Island, Japan. Scale: See Image.
© Rruff Database

Bicchulite Crystallography

Cell Dimensions:

a = 8.829, Z = 4; V = 688.23 Den(Calc)= 2.82

Crystal System:

Isometric - HextetrahedralH-M Symbol (4 3m) Space Group: I 43m

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

By Intensity(I/I_o): 2.786(1), 3.6(0.9), 1.559(0.5),

Crystal Structure:

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Sahl K , Chatterjee N D , Zeitschrift fur Kristallographie , 146 (1977) p.35-41, The crystal structure of bicchulite, Ca2[Al2SiO6](OH)2, Locality: synthetic

Physical Properties of Bicchulite

Color:

Colorless.

Density:

2.75

Diaphaneity:

Transparent

Streak:

white

Optical Properties of Bicchulite

Gladstone-Dale:

CI meas= -0.049 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.023 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2216,KPDmeas= 0.2273,KC= 0.2166
Ncalc = 1.6 - 1.61

Optical Data:

Isotropic, n=1.625.

Calculated Properties of Bicchulite

Electron Density:

Bulk Density (Electron Density)=2.82 gm/cc
note: Specific Gravity of Bicchulite =2.82 gm/cc.

Fermion Index:

Fermion Index = 0.0050700347
Boson Index = 0.9949299653

Photoelectric:

PE_Bicchulite= 4.28 barns/electron
U=PE_Bicchulite x rElectron Density= 12.06 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Bicchulite is Not Radioactive

Bicchulite Classification

Dana Class:

76.02.03.05 (76)Tectosilicate Al-Si Framework

(76.02)Feldspathoids and related species

(76.02.03)Sodalite group

76.02.03.01 Sodalite Na8Al6Si6O24Cl2 P 43n 4 3m

76.02.03.02 Nosean Na8Al6Si6O24(SO4) P 43m 4 3m

76.02.03.03 Hauyne (Na,Ca)4-8Al6Si6(O,S)24(SO4,Cl)1-2 P 43n 4 3m

76.02.03.04 Lazurite Na3Ca(Al3Si3O12)S P 43n 4 3m

76.02.03.05 Bicchulite Ca2Al2SiO6(OH)2 I 43m 4 3m

76.02.03.06 Kamaishilite Ca2Al2SiO6(OH)2 I-lattice Tetra

76.02.03.07 Tugtupite Na4AlBeSi4O12Cl I 4 4

76.02.03.08 Tsaregorodtsevite N(CH3)4AlSi5O12 I 222 2 2 2

Strunz Class:

09.FB.10 09 - SILICATES (Germanates)

09.F - Tektosilicates without Zeolitic H2O

09.FB -Tektosilicates with additional anions

09.FB.10 Bicchulite Ca2Al2SiO6(OH)2 I 43m 4 3m

09.FB.10 Danalite Fe4Be3(SiO4)3S P 43n 4 3m

09.FB.10 Hauyne (Na,Ca)4-8Al6Si6(O,S)24(SO4,Cl)1-2 P 43n 4 3m

09.FB.10 Genthelvite Zn4Be3(SiO4)3S P 43n 4 3m

09.FB.10 Helvite Mn4Be3(SiO4)3S P 43n 4 3m

09.FB.10 Lazurite Na3Ca(Al3Si3O12)S P 43n 4 3m

09.FB.10 Kamaishilite Ca2Al2SiO6(OH)2 I-lattice Tetra

09.FB.10 Nosean Na8Al6Si6O24(SO4) P 43m 4 3m

09.FB.10 Sodalite Na8Al6Si6O24Cl2 P 43n 4 3m

09.FB.10 Tugtupite Na4AlBeSi4O12Cl I 4 4

09.FB.10 Tsaregorodtsevite N(CH3)4AlSi5O12 I 222 2 2 2

Other Bicchulite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Bicchulite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Bicchulite

Ca2Al2SiO6(OH)2
Dana No: 76.02.03.05 Strunz No: 09.FB.10
Locality:

Notes: