La lemoynite correspond à la formule chimique (Na, Ca)3 Zr2Si8O22.8H2O. L'analyse chimique a donné: SiO2 47.32%, ZrO2 23.23, TiO2 0.43, Nb2O5 2.18, TR2O3 1.18, Fe2O3 1.61, MnO 0.10 CaO 5.06, Na2O 4.75, H2O 13.33, total 99.19. Nx, = 1.540, Ny = 1.553 = b, Nz = 1.570, Z Λ a = 5°,2Vobs = 80°,2Vcale = 83°, signe optique +, allongement positif. Le groupe d'espace appartient à l'aspect C* (probablement C2/m): a = 10.48 Å, b = 16.20Å, c = 9.O7Å, β = 105°20', Z = 2 ρobs. = 2.29 ρcale.: 2.26. Les cinq lignes les plus intenses du cliché Debye-Scherrer sont: 8.01 Å à 100, 3.562 Å à 49,2.807 Å à 48, 9.0 Å à 37 et 3.034 Å à 33. On retrouve la lemoynite dans certains accidents pegmatitiques du massif alcalin de St-Hilaire; I'espèce appartient probablement à la phase hydrothermale. Le nom rappelle Charles Lemoyne, sieur de Longueuil, et ses célèbres fils, tous personnages bien connus de I'histoire du Canada frangais.
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June 01, 1969
THE CANADIAN MINERALOGIST
Guy Perrault;
Guy Perrault
*
Ecole Polytechnique de Montréal, Canada
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E. I. Semenov;
E. I. Semenov
†
Institut de Minéralogie et de Géochimie des Eléments Rares. Moscou, U.R.S.S.
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A. V. Bikova;
A. V. Bikova
†
Institut de Minéralogie et de Géochimie des Eléments Rares. Moscou, U.R.S.S.
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T. A. Capitonova
T. A. Capitonova
†
Institut de Minéralogie et de Géochimie des Eléments Rares. Moscou, U.R.S.S.
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Guy Perrault
*
Ecole Polytechnique de Montréal, Canada
E. I. Semenov
†
Institut de Minéralogie et de Géochimie des Eléments Rares. Moscou, U.R.S.S.
A. V. Bikova
†
Institut de Minéralogie et de Géochimie des Eléments Rares. Moscou, U.R.S.S.
T. A. Capitonova
†
Institut de Minéralogie et de Géochimie des Eléments Rares. Moscou, U.R.S.S.
Publisher: Mineralogical Association of Canada
First Online:
02 Mar 2017
Online ISSN: 1499-1276
Print ISSN: 0008-4476
© 1969 Mineralogical Association of Canada
Mineralogical Association of Canada
The Canadian Mineralogist (1969) 9 (5): 585–596.
Article history
First Online:
02 Mar 2017
Citation
Guy Perrault, E. I. Semenov, A. V. Bikova, T. A. Capitonova; THE CANADIAN MINERALOGIST. The Canadian Mineralogist 1969;; 9 (5): 585–596. doi:
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