抄録
Compressibilities of pyrite and cattierite have been examined by the single-crystal X-ray diffraction method up to 42 kbar and 36 kbar, respectively. Both S–S and M–S (M: Fe, Co) bonds in both of the minerals are contracted linearly with pressure within the experimental pressure ranges. However, contraction of the S–S bond in cattierite is much smaller than that in pyrite, whereas the Co–S bond shows a larger contraction than Fe–S. Bonding strength (or hardness) of the S–S bond is estimated to be about 60% of that for Fe–S in pyrite.
