... and extremely thin nature of the crystals, nothing more was done with this material until recently. The species UK 74 from Mont Saint-Hilaire was later found to be lintisite, first described from Mount Alluaiv, Lovozero complex, Russia by Khomyakov et al. (1990) , and whose structure was determined...

.... The structure of normandite was determined independently using crystals from Amdrup Fjord and Mont Saint-Hilaire. A crystal from Amdrup Fjord was selected from those studied by Weissenberg techniques and mounted on a Siemens four-circle diffractometer. Intensity data were collected under the following operating...

... of the series monteregianite-(Y), KNa 2 Y[Si 8 O 19 ]⋅5H 2 O, has only been found at the famous alkaline igneous complex Mont Saint-Hilaire, Quebec, Canada (Chao, 1978 ; Ghose et al ., 1987 ). It usually occurs in miarolitic cavities in igneous breccia and marble xenoliths (Horvath et al ., 2019...

... , K.L. ( 1983 ): An interim report on the geology and petrology of the Mont Saint-Hilaire pluton, Quebec . Geol. Surv. Can., Pap . 83–1B , 39 – 46 . Currie , K.L. , Eby , G.N. & Gittins , J. ( 1986 ): The petrology of the Mont Saint-Hilaire complex, southern Quebec...

...Joel D. Grice; Robert A. Gault Abstract Johnsenite-(Ce), ideally Na 12 (Ce,La,Sr,Ca,□) 3 Ca 6 Mn 3 Zr 3 W(Si 25 O 73 )(CO 3 )(OH,Cl) 2 , is a new member of the eudialyte group from Mont Saint-Hilaire, Quebec, and is the W analogue of zirsilite-(Ce). It occurs as deeply etched, skeletal crystals...

... is focused on the crystal chemistry, behavior, and geochemistry of rare elements in alkaline systems. She is currently working on alkaline intrusions in southeastern British Columbia (Mount Mather Creek and the Ice River Alkaline Complex), alkaline basalts in Cambodia, and the systematics of various mineral...

...]. The proposed coupled substitution between kupletskite and niobokupletskite appears to be extensive. In samples of Mn-dominant astrophyllite-group minerals from a variety of SiO 2 -undersaturated complexes, including Mont Saint-Hilaire, Lovozero (Kola Peninsula, Russia) and the Oslo rift (Langesundsfjord area...

...Andrew M. McDonald; George Y. Chao Abstract Kodamaite, ideally Na 3 (Ca 5 Na) 6 Si 16 O 36 (OH) 4 F 2 ·14− x H 2 O, where x = ∼5, is a new mineral discovered at the Poudrette quarry, Mont Saint-Hilaire, Quebec, Canada. It develops in spherulitic aggregates up to ∼2 mm across, comprising thin, platy...

...Andrew M. McDonald; George Y. Chao Abstract Bobtraillite is a new, complex zirconosilicate found in igneous breccias and nepheline syenite pegmatites at the Poudrette quarry, Mont Saint-Hilaire, Quebec. It is associated with a burbankite-group mineral, donnayite-(Y), clinoamphibole, albite...

... & Perrault 1976 ) and altisite ( Ferraris et al . 1995 ). All these minerals occur in highly alkaline environments (lemoynite and natrolemoynite at Mont Saint-Hilaire, altisite in the Khibina complex, Kola Peninsula, Russia) and principally differ in composition. Lemoynite (space-group C 2/ c ; Le Page...

...Andrew M. McDonald; George Y. Chao Abstract Rogermitchellite is a new, complex species of zirconosilicate found in igneous breccia at the Poudrette quarry, Mont Saint-Hilaire, Quebec. It is associated with aegirine, annite, galena, a labuntsovite-group mineral, manganoneptunite, microcline...

.... & Mann , J.B. ( 1968 ): X-ray scattering factors computed from numerical Hartree–Fock wave functions . Acta Crystallogr . A24 , 321 – 324 . Currie , K.L. , Eby , G.N. & Gittins , J. ( 1986 ): The petrology of the Mont Saint-Hilaire complex, southern Québec: an alkaline...

... ( Fig. 1 a,b ) 1,6 , locally poikilitic or interstitial EGM crystals 8 Locally primary magmatic complex sector and oscillatory zonations 6,8,9 Early- to late-magmatic Mont Saint-Hilaire, SE Canada Cretaceous complex of the Monteregian Hills province 10,11,12,13,14,15,16 ; alkali basaltic...

...Anton R. Chakhmouradian; Normon M. Halden; Roger H. Mitchell; László Horváth Abstract Rasvumite and “loparite-(Ce)” from the Mont Saint-Hilaire alkaline complex in Québec were re-examined using a variety of analytical techniques. Rasvumite crystals from a marble xenolith and tawite (“sodalite...

... that, conversely, fluorcarletonite might occur in the rocks of Mount Saint-Hilaire Massif, Canada. However, pure hydroxyl or fluorine end-members have not yet been found. The occurrence of carletonite in lateritic soils covering carbonatites, ijolites, nepheline syenites and fenites of the Bingo carbonate complex...

... of the complexities of tetranatrolite, a crystal fragment from Mont Saint-Hilaire sample R18930, composed entirely of tetranatrolite, was selected for crystal structure analysis and is described in this paper. Artioli and Galli (1999 , p. 1445) state that gonnardite “has a large chemical variability, and its...

...Andrew M. McDonald; George Y. Chao Abstract Lalondeite, ideally (Na,Ca) 6 (Ca,Na) 3 Si 16 O 38 (F,OH) 2 ·3H 2 O, is a new mineral species from the Poudrette quarry, Mont Saint- Hilaire, Quebec. The mineral forms elongate aggregates of densely packed, randomly oriented crystals. Individual crystals...

.... However, crystallochemical data from various samples of “labuntsovite” and “nenadkevichite” from several localities in the Kola Peninsula (Lovozero, Khibiny, Kovdor and Turiy Mys alkaline complexes), Quebec (Mont Saint-Hilaire), Wyoming (Trona mine) and Greenland (Ilímaussaq) revealed that significant...

...Andrew M. McDonald; George Y. Chao Abstract Martinite, ideally (Na,□,Ca) 12 Ca 4 (Si,S,B) 14 B 2 O 38 (OH,Cl) 2 F 2 ·4H 2 O, is a new mineral species from the Poudrette quarry, Mont Saint-Hilaire, Quebec. The mineral arose through the interaction of highly fractionated, hyperagpaitic fluids...

... the sodalite syenite plot within the overlapping skarn, phosphorite and carbonatite fields whereas those from the host rock plot within the skarn–carbonatite field. ( Fig. 18 ). Mount Mather Creek is only the second occurrence of quintinite in Canada, together with the type locality Mont Saint-Hilaire...