Formula: Ca(Ce,La)2(CO3)3F2
Origin of name: for J. Paris, Columbian mine proprietor
Crystal system: hexagonal
Crystal class: 3
Twinning:
Unit cell: a = 7.12 Å, c = 14.02 Å
Colour: brownish yellow, brown, gray-yellow, wax-yellow
Diaphaneity:
Luster: vitreous to resinous
Habit: crystals acute double hexagonal pyramids, may be prismatic in appearance, may be rhombohedral
Hardness: 4.5
Specific gravity: 4.36
Cleavage: 1; {0001} distinct
Tenacity: brittle
Streak:
Synonyms/varieties:
Comments: two distinct species with the extensions -(Ce) and -(Nd), indicating the predominant rare earth cation in the composition, there are also parisite-(Ce)-8H and -10H
| Back to Alphabetical list | Colour photos | Thin sections | SEM images | TEM images | vibrational spectra description | IR spectra | Raman spectra | N-IR spectra | F-IR spectra | IES spectra |