| Lalondeite Mineral Data |
General Lalondeite Information |
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| (Na,Ca)6(Ca,Na)3Si16O38(F,OH)2·3(H2O) | |||
| Molecular Weight = 1,392.12 gm | |||
| Sodium 7.43 % Na 10.02 % Na2O | |||
| Calcium 10.08 % Ca 14.10 % CaO | |||
| Silicon 32.28 % Si 69.06 % SiO2 | |||
| Hydrogen 0.47 % H 4.21 % H2O | |||
| Oxygen 47.70 % O | |||
| Fluorine 2.05 % F 2.05 % F | |||
| - % F -0.86 % -O=F2 | |||
| ______ ______ | |||
| 100.00 % 98.56 % = TOTAL OXIDE | |||
| Na4.5Ca3.5Si16O38F1.5(OH)0.5·3(H2O) | |||
| Reyerite group; structure determined | |||
| Proposed IMA 2002 (Dana # Added) | |||
| Link to MinDat.org Location Data. | |||
| Commission on New Minerals and Mineral Names (CNMMN) | |||
| IMA2002-026 | |||
Search for Lalondeite Images | |||
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Lalondeite Crystallography |
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| a:b:c =0.7934:1:0.7914 | |||
| a = 9.613, b = 12.115, c = 9.589, Z = 1.3333; alpha = 92.95°, beta = 119.81°, gamma = 96.62° V = 961.24 Den(Calc)= 3.21 | |||
| Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1 | |||
| By Intensity(I/Io): 2.888(1), 11.99(1), 5.97(0.85),1.82(0.5), 2.967(0.5), 3.97(0.4), | |||
Physical Properties of Lalondeite |
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| Colorless. | |||
| Pearly | |||
Optical Properties of Lalondeite |
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| CI calc= 0.21 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.164,KC= 0.2075 |
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| Biaxial (-), a=1.522, b=1.528, g=1.529, bire=0.0070 | |||
Calculated Properties of Lalondeite |
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relectron=3.21 gm/cc |
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| Fermion Index = 0.01544 Boson Index = 0.98456 |
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PELalondeite = 2.62 barns/electron |
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| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Lalondeite is Not Radioactive |
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Lalondeite Classification |
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| 73.2.2d.2 (73)Phyllosilicate Condensed Tetrahedral Sheets | |||
| (73.2)with double and single layers | |||
| (73.2.2d)Reyerite group (Triclinic Subgroup) | |||
| VIII/HX.00-00 VIII - Silicates | |||
| VIII/HX - Unclassified Strunz Phyllosilicates | |||
| VIII/HX.00 - Reyerite Group | |||
Other Lalondeite Information |
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| Links to other databases for Lalondeite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas Search for Lalondeite using: Visit our Advertisers for Lalondeite : Translate Lalondeite Mineral Data : Ask about Lalondeite here : Print or Cut-and-Paste your Lalondeite Specimen Label here :
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