Lead mercaptides: materials useful as powder secondary standards and internal references for calibration of X-ray diffractometers at small and medium angles

Long-chain lead alkanethiolates prepared from pure mercaptans provide numerous sharp long-spacing and low-order lines and also very many strong high-order lines between the lines of silicon standard reference material. The resulting statistical accuracy thus extends exact calibration of X-ray diffractometers to intermediate and large d values without other validation or data.