TY - RPRT TI - Activity product constant of cryolite at 25°C and one atmosphere using selective-ion electrodes to estimate sodium and fluoride activities AU - C. E. Roberson AU - J.D. Hem PY - 1968 DO - 10.1016/0016-7037(68)90033-1 UR - https://pubs.usgs.gov/publication/70011532 ID - 70011532 ER -