XRPD dataset of Arsenopyrite from Šumadija-Kopaonik ore district

Arsenopyrite is a common sulphide mineral in numerous polymetallic Pb-Zn-(±Cu, Ag, Au, Sb, Bi, W) mineralizations of the Šumadija-Kopaonik ore district, where significant and economically significant ore deposits are located, such as world-class Trepča deposit. The dataset is composed of experimental XRPD data recorded on powdered arsenopyrite of representative samples, showing variations in terms of unit cell dimensions, d(131) and composition, i.e. As:S ratio. The dataset is associated with a scientific article; DOI: XXXX.xXXX The dataset is composed of "experimental" and "descriptive" data and is organised as follows: EXPERIMENTAL: a [A]; b [A]; c [A]; alpha [°]; beta [°]; V [A^3]; d(131) [2T]; followed by DESCRIPTION: location; spl ID; As : S at%(SEM); At% Fe (SEM); doping .at% (SEM); XRD at%As; mineral association; shape. form/zoning. The dataset is provided as a standard CSV file and as a TXT version. Methods Arsenopyrite was analyzed by JEOL JSM–6610LV scanning electron microscope (SEM), equipped with an energy-dispersive spectrometer (EDS) of Oxford Instruments, model X-Max Large Area Analytical Silicon Drift Detector, connected with INCAEnergy 350 Microanalysis System. An acceleration voltage of 20 kV was used for the analyses. Before observation, the polished sections were sputtered by an nm-thick carbon layer to prevent charging. As this investigation aimed to check the elevated trace elements content in arsenopyrite, the composition of the minerals was only routinely checked by SEM-EDS, using internal standards of the Oxford Instruments software. The detection limit was ~0.1 wt.%. Simultaneously with this analysis, the homogeneity/zoning of the arsenopyrite crystals was investigated by backscattered electron images (BSE). The XRPD study of arsenopyrite from 4 samples shows only slight variations in terms of unit cell dimensions and composition, i.e. As:S ratio (Table 1). Considering that the calculated arsenic content is close to its theoretical value of 33.3 at.%, it can be said that the examined arsenopyrite from Dreanjak shows almost ideal stoichiometry. Otherwise, this ratio in arsenopyrite can vary significantly, as a result of which the As content ranges from less than 30 to 38.5 at.% (Kretschmar and Scott, 1976). The at.% As was calculated after the equation at.% As = 866.67 d131 – 1381.12 given by Kretschmar and Scott (1976). References Kretschmar , U. and Scott, S.D., 1976. Phase relations involving arsenopyrite in the system Fe-As-S a