STABILITY OF STIBNITE, METASTIBNITE, AND SOME PROBABLE DISSOLVED ANTIMONY SPECIES AT 298.15 DEGREES K AND 1 ATMOSPHERE

Thermochemical calculations involving stibnite, metastibnite, and some probable dissolved antimony species at 298.15° K and 1 atmosphere indicate that: (1) (SbS3)3- ion may be important in the transportation of antimony in aqueous solutions rather than (SbS 2)-, (HSbS2)- or (Sb 4S7)2-. (2) In all reactions, stibnite is stable relative to metastibnite thus suggesting that the latter's occurrence is metastable and controlled by kinetics rather than by laws of empirical thermodynamics. © 1972 Society of Economic Geologists, Inc.