title: Pyrrhotites: Stoichiometric Compounds with Composition Fen--1Sn (nge8).
abstract: A new type of natural pyrrhotite, orthorhombic 11C type (a = 6.892, b = 11.952, c = 5.744 x 11 angstroms), and the hexagonal 6C type (a = 6.89, c = 5.76 x 6 angstroms) are described. Their compositions are Fe(10)S(11) and Fe(11)S(12), respectively. Pyrrhotites stable in nature have essentially stoichiometric composition, Fe(n)-(l)S(n) (n>/=8), with the structures of n/2C type for n even and of nC type for n odd. The solid solutions between Fe(11)S(12) and Fe(10)S(11), and between Fe(10)S(11) and Fe(9)S(10) are considered metastable in nature.
authors.forename: N
authors.initials: N
authors.lastname: Morimoto
authors.forename: H
authors.initials: H
authors.lastname: Nakazawa
authors.forename: K
authors.initials: K
authors.lastname: Nishigucmi
authors.forename: M
authors.initials: M
authors.lastname: Tokonami