Apatite CL/SEM measurement, e<sup>-</sup> beam, Roeder <i>et al.</i> 1987

Apatite CL/SEM measurement, e^- beam, Roeder et al. 1987

Reference	Roeder et al. 1987 Roeder P. L., Macarthur D., Ma X. P., Palmer G. R. & Mariano A. N. (1987). Cathodoluminescence and Microprobe Study of Rare-Earth Elements in Apatite. American Mineralogist, 72(7-8), 801-811. https://pubs.geoscienceworld.org/msa/ammin/article/72/7-8/801/104985
Material	Apatite [ Ca₅(PO₄)₃(OH, F, Cl) ] Doubly-terminated fluorapatite crystal in calcite, from Yates mine, Otter Lake, Pontiac RCM, Outaouais, Québec, Canada © Photo by Didier Descouens, CC-SA-4.0
Specimen temperature	Ambient
Technique	Cathodoluminescence (CL), using a Scanning Electron Microscope (SEM)
Probe	Electron beam
Lines	Dy³⁺ 568 nm, 480 nm, Eu³⁺ 615 nm, 585 nm, 645 nm, 690 nm, Mn²⁺ 560 nm, Sm³⁺ 595 nm, Tb³⁺ 540 nm

Nominal composition of Apatite [ Ca₅(PO₄)₃(OH,F,Cl) ].
Element	Atoms	At%	Wt%
H	0.118	1.66	0.07
Ca	1.667	23.42	39.36
P	1	14.05	18.25
O	4.112	57.76	38.76
F	0.111	1.56	1.24
Cl	0.111	1.56	2.32