Horvathite-(Y) Grice J D, Chao G Y The Canadian Mineralogist 35 (1997) 743-749 Horvathite-(Y), rare-earth fluorocarbonate, a new mineral species from Mont Saint-Hilaire, Quebec Locality: Mont Saint-Hilaire, Quebec, Canada _database_code_amcsd 0005523 6.959 9.170 6.301 90 90 90 Pmcn atom x y z Uiso Na .25 .2175 .1711 .023 Y .75 .42143 -.01305 .0092 C .75 .0590 .0401 .014 O1 .25 -.1856 -.1309 .019 O2 .75 .4554 .3421 .026 O3 .25 .0508 -.1625 .022 F .5607 .6300 .0420 .018