Mo target rotating anode with vertical line source and high-resolution Huber 2-circle diffractometer with Osmic Max-Flux multi-layer mirror wide band-pass monochromator, coupled to (111), (220), or (400) Si 2-bounce channel-cut post-monochromator, SPEC software control, high-count rate scintillation detector, automated beam attenuator and multi-channel analyzer XRF spectroscopy system.