[meteorite-list] RE: Lodranites in stony-iron ???

[bernd.pauli at paulinet.de]

Hello Confrère Pierre, Norbert, and List,

MASON B. (1962) Meteorites, p. 125:

"The single siderophyre is the Steinbach meteorite (also known as Breitenbach
or Rittersgrün), which has been known since 1724. It consists of  a network
of nickel-iron which encloses granular aggregates of orhopyroxene and minor
tridymite, the nickel-iron and silicate being present in approximately equal
amounts. Accessory minerals are schreibersite (in the nickel-iron), chromite,
and troilite. The nickel-iron contains about 10% Ni and shows the Widman-
stätten structure. The orthopyroxene contains about 20 mole per cent FeSiO3,
and is therefore on the boundary between bronzite and hypersthene."

BTW: A siderite used to be a meteorite consisting almost entirely of metallic
minerals -   "sideros" being the Greek word for "iron". The syllable "phyre"
usually says something contains coarse crystals, as phenocrysts, in a finer-
grained groundmass.


Best Perseid
wishes,

Bernd