Morimoto N, Nakazawa H, Nishigucmi K, Tokonami M
Science. 1970 May 22;168(3934):964-6. doi: 10.1126/science.168.3934.964.
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.
描述了一种新型天然磁黄铁矿，即正交11C型（a = 6.892，b = 11.952，c = 5.744×11埃）和六方6C型（a = 6.89，c = 5.76×6埃）。它们的组成分别是Fe(10)S(11)和Fe(11)S(12)。自然界中稳定的磁黄铁矿基本具有化学计量组成Fe(n)-(l)S(n)（n≥8），n为偶数时结构为n/2C型，n为奇数时结构为nC型。Fe(11)S(12)与Fe(10)S(11)之间以及Fe(10)S(11)与Fe(9)S(10)之间的固溶体在自然界中被认为是亚稳的。
