EPMA data for nagyágite from the Yangxie gold deposit in the North Qinling

The chemical compositions of nagyágite were determined using a EPMA-1720HT Electron Probe Micro-Analyzer under the operation conditions of 15 kV, 10 nA, a beam size of 5 μm, and count times of 10 s (peak) and 5 s (backgrounds) at the Xi'an Center of Mineral Resources Survey, China Geology Survey. The standard materials for each element were as follows: arsenopyrite for As; native gold for Au; pyrite for Fe; zinc selenide for Se; galena for S; Native metal standards for Co, Ni, Ti, and Mn; bismuthinite for Bi; chalcopyrite for Cu; argentite for Ag; sphalerite for Zn; greenockite for Cd; stibnite for Sb; germanium telluride for Te.The analysis yielded an accuracy of < 2%.