Characterization of fluor-chlorapatites by electron probe microanalysis with a focus on time-dependent intensity variation of halogens

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Heterogeneous distribution of H2O in the Martian interior: Implications for the abundance of H2O in depleted and enriched mantle sources (2016, methodology): “Goldoff et al. (2012) presented a method to minimize changes in count rate for F and Cl; however, the apatites analyzed in this study were too small to apply this technique.”
The abundance, distribution, and isotopic composition of Hydrogen in the Moon as revealed by basaltic lunar samples: Implications for the volatile inventory of the Moon (2013, methodology): “Finally, electron microprobe analysis of apatites was carried out at the Open University using a Cameca SX100 electron microprobe, following a slightly modified procedure described in Goldoff et al. (2012). The following analytical routine was used: Condition 1: F (PCO, 60s, no time zero correction)”
Technical Note: Calculation of stoichiometry from EMP data for apatite and other phases with mixing on monovalent anion sites (2015, background): “…Apatite [Ca10(PO4)6(F,Cl,OH)2] is a challenging mineral for electron microprobe analysis (EMPA), both due to fluorine migration under the electron beam (Goldoff et al. 2012; Stormer et al. 1993) and the necessity to compensate for the presence of halogens when calculating stoichiometry.”