Tilleyite Mineral Data + 
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- 56.2.9.1 Tilleyite Ca5Si2O7(CO3)2 P 21/a 2/m
- 56.2.9.2 Killalaite 2Ca3Si2O7·(H2O) P 21/m 2/m
- 56.2.9.3 Foshallasite Ca3Si2O7·3(H2O) Mono
- VIII/C.09-20 Tilleyite Ca5Si2O7(CO3)2 P 21/a 2/m
- VIII/C.09-30 Jaffeite Ca4(Si3O7)(OH)6 P 3 3
- VIII/C.09-40 Suolunite Ca2Si2O5(OH)2·(H2O) F dd2 mm2
- VIII/C.09-50 Killalaite 2Ca3Si2O7·(H2O) P 21/m 2/m
- VIII/C.09-60 Foshallasite Ca3Si2O7·3(H2O) Mono
General Tilleyite Information |
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 Chemical Formula: |
Ca5Si2O7(CO3)2 | ||
| Composition: |
Molecular Weight = 488.58 gm | ||
| Calcium 41.02 % Ca 57.39 % CaO | |||
| Silicon 11.50 % Si 24.60 % SiO2 | |||
| Carbon 4.92 % C 18.02 % CO2 | |||
| Oxygen 42.57 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Ca5Si2O7(CO3)2 | ||
| Environment: |
Metamorphosed limestone | ||
| IMA Status: |
Valid Species (Pre-IMA) 1933 | ||
| Locality: |
Crestmore quarry, 5 miles NW of Riverside, Riverside County, California. Link to MinDat.org Location Data. | ||
| Synonym: |
ICSD 14256 | ||
| PDF 24-184 | |||
Tilleyite Image | |||
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Images:
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Tilleyite Crystallography |
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| Axial Ratios: |
a:b:c =1.4631:1:0.7428 | ||
| Cell Dimensions: |
a = 15.025, b = 10.269, c = 7.628, Z = 4; beta = 105.833° V = 1,132.29 Den(Calc)= 2.87 | ||
| Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/a | ||
| X Ray Diffraction: |
By Intensity(I/Io): 3.005(1), 3.095(0.85), 2.895(0.65), | ||
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Crystal Structure:
Mouse |
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Physical Properties of Tilleyite |
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| Cleavage: |
[100] Perfect, [101] Good | ||
| Color: |
Colorless, White. | ||
| Density: |
2.84 | ||
| Diaphaniety: |
Transparent to Translucent | ||
| Streak: |
white | ||
Optical Properties of Tilleyite |
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| Gladstone-Dale: |
CI meas= -0.064 (Fair) - where the CI = (1-KPDmeas/KC) CI calc= -0.053 (Good) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2208,KPDmeas= 0.2231,KC= 0.2097 |
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| Optical Data: |
Biaxial (+), a=1.612-1.617, b=1.632-1.635, g=1.652-1.654, bire=0.0370-0.0400, 2V(Calc)=88-90, 2V(Meas)=85-90. Dispersion r < v. | ||
Calculated Properties of Tilleyite |
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| Electron Density: |
relectron=2.87 gm/cc |
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| Fermion Index |
Fermion Index = 0.00666 Boson Index = 0.99334 |
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| Photoelectric: |
PETilleyite = 5.53 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Tilleyite is Not Radioactive |
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Tilleyite Classification |
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| Dana Class: |
56.2.9.1 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O | ||
| (56.2)with cations in [4] and/or >[4] coordination | |||
| (56.2.9)Tilleyite - Killalaite group | |||
| Strunz Class: |
VIII/C.09-20 VIII - Silicates | ||
| VIII/C - Sorosilicates with [Si2O7]6-, with anions unfamiliar to tetraheders [O,OH,F] | |||
| VIII/C.09 - Tilleyite - Foshallasite series | |||
Other Tilleyite Information |
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| References: |
NAME( MinRec) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Heinrich65) | ||
| See Also: |
Links to other databases for Tilleyite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 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 - WWW-MINCRYST 15 -École des Mines de Paris Search for Tilleyite using: Visit our Advertisers for Tilleyite : Translate Tilleyite Mineral Data : Ask about Tilleyite here : Print or Cut-and-Paste your Tilleyite Specimen Label here :
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