Killalaite 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 Killalaite Information |
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 Chemical Formula: |
2Ca3Si2O7·(H2O) | ||
| Composition: |
Molecular Weight = 594.82 gm | ||
| Calcium 40.43 % Ca 56.57 % CaO | |||
| Silicon 18.89 % Si 40.41 % SiO2 | |||
| Hydrogen 0.34 % H 3.03 % H2O | |||
| Oxygen 40.35 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Ca6Si4O14·(H2O) | ||
| IMA Status: |
Approved IMA 1974 | ||
| Locality: |
Link to MinDat.org Location Data. | ||
| Synonym: |
ICSD 200124 | ||
| PDF 29-332 | |||
Search for Killalaite Images | |||
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Images:
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Killalaite Crystallography |
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| Axial Ratios: |
a:b:c =0.4403:1:0.4405 | ||
| Cell Dimensions: |
a = 6.807, b = 15.459, c = 6.811, Z = 2; beta = 97.76° V = 710.15 Den(Calc)= 2.78 | ||
| Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/m | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.824(1), 3.03(0.8), 2.724(0.6), | ||
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Crystal Structure:
Mouse |
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Physical Properties of Killalaite |
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| Cleavage: |
[100] Perfect, [010] Good, [001] Good | ||
| Color: |
Colorless, White. | ||
| Density: |
2.94 | ||
| Streak: |
white | ||
Optical Properties of Killalaite |
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| Gladstone-Dale: |
CI meas= -0.019 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= -0.078 (Fair) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2297,KPDmeas= 0.2172,KC= 0.2131 |
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| Optical Data: |
Biaxial (-), a=1.635, g=1.642, bire=0.0070, 2V(Meas)=26. | ||
Calculated Properties of Killalaite |
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| Electron Density: |
relectron=2.95 gm/cc |
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| Fermion Index |
Fermion Index = 0.00956 Boson Index = 0.99044 |
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| Photoelectric: |
PEKillalaite = 5.67 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Killalaite is Not Radioactive |
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Killalaite Classification |
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| Dana Class: |
56.2.9.2 (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.09-50 VIII - Silicates | ||
| VIII/C - Sorosilicates with [Si2O7]6-, with anions unfamiliar to tetraheders [O,OH,F] | |||
| VIII/C.09 - Tilleyite - Foshallasite series | |||
Other Killalaite Information |
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| References: |
PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
| See Also: |
Links to other databases for Killalaite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - WWW-MINCRYST 14 -École des Mines de Paris Search for Killalaite using: Visit our Advertisers for Killalaite : Translate Killalaite Mineral Data : Ask about Killalaite here : Print or Cut-and-Paste your Killalaite Specimen Label here :
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