First Occurrence of Suessite on the Earth

Silver substitution into synthetic zinc, cadmium, and iron tetrahedrites

“…The rarity can be in part explained by the comparative inability of Bi to form regular coordination polyhedra in sulphides and its preference for forming other sulphosalts rather than tetrahedrite. Tellurium-bearing tetrahedrites have also been reported (Springer, 1969;Novgorodova et al, 1978 M 2 +. The commonest elements (M 2 +) substituting for the two Cu 2 + in end-member tetrahedritetennantites are Zn and Fe.…”

Microstructure and Mechanical Properties of Si3N4-Fe3Si Composites Prepared by Gas-Pressure Sintering

“…Assuming that Fe-Si 3 N 4 contains 18 wt. % Fe 3 Si and the density of Fe 3 Si is 6.34 g/cm 3 [37], the content of Fe 3 Si for each sample before sintering are calculated and the results (see Table 1) are 1.9, 3.9, 5.9, 8.1, and 9.2 vol. % respectively.…”