pyrrhotite

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Synonyms for pyrrhotite

a brownish iron sulfide mineral (FeS) having weak magnetic properties

References in periodicals archive ?
[delta] [delta] [sup.18]O [sup.15]O (VSMOW) (Air) mean SD mean SD Mass reared moths 15.9 0.5 4.0 0.2 Cotton reared moths 20.6 0.5 10.8 0.7 [delta] [delta] [sup.13]O [sup.34]O (VPDB) (VCDT) mean SD mean SD Mass reared moths -25.1 0.7 1.0 0.3 Cotton reared moths -26.2 1.0 4.3 0.9 Note: The internationally recognized standards are: Vienna Standard Mean Ocean Water (VSMOW) for 18O, Vienna Pee Dee Belemnite (VPDB) for carbon, and Vienna Canon Diablo troilite (VCDT) for sulphur.
The surfaces showed eight "elongated patches of troilite", (5) some graphite and an oriented sheen when viewed at an angle.
Where the dominant contaminant is iron sulfide in the mackinawite or troilite form, a noticeable reddish color will occur in treated samples almost immediately.
Primary standards were Pee Dee Belemnite (PDB) for carbon, atmospheric air ([N.sub.2]) for nitrogen, and Canyon Diablo Troilite (CDT) for sulfur.
For simplicity, the molecular formula of FeS (troilite) was used in this study.
Carbon, nitrogen, and sulfur standards were calibrated relative to Peedee Belemnite (PDB), atmospheric [N.sub.2], and Canon Diablo Troilite (CDT), respectively.
Troilite FeS, brookite Ti[O.sub.2], siderite FeC[O.sub.3], iron sulfate [Fe.sub.2][(SO4).sub.3], aluminium oxide [Al.sub.2][O.sub.3] and many magnesium compounds--clinoenstatite MgSi[O.sub.3], bredigite [Ca.sub.14][Mg.sub.2][(Si[O.sub.4]).sub.8], merwinite [Ca.sub.3]Mg[(Si[O.sub.4]).sub.2], huntite [Mg.sub.3]Ca[(C[O.sub.3]).sub.4], calcite magnesian (Ca,Mg)C[O.sub.3], sodium calcium magnesium silicate [Na.sub.2][Ca.sub.4][Mg.sub.2][Si.sub.4][O.sub.15] are probably also present.
He found meteoritic troilite to be isotopically uniform and chose it as a standard.
Minor minerals include schreibersite, rhabdite, troilite, cohenite, graphite, and sphalerite (Buchwald 1975; Dominik 1976).
The sulfur isotopic data are reported in delta notation ([per thousand]) relative to Vienna Canyon Diablo Troilite (V-CDT).
The 63 papers report on such topics as synthesizing novel chromium oxide using a hydrothermal method and and analyzing its magnetism and structure, phase relations of FeSs-VS2 system and the new phase of the defect troilite structure, particularities of structure and stability of cationic-ordered layered titanates, theoretical studies on the role of transition elements in the stability of magnesium hydride, half a century of nano-anti-ferromagnetism: Richardson's phenomenon and Neel's models, and characterization phenomena and magnetic phase transitions in rare earth intermetallics.
The team considered several candidate sources, including metallic iron, but settled on iron atoms coming from fluffy bits of troilite (FeS).
Troilite, usually thought of as a meteoritic mineral, was identified by Gordon (1944) at Llallagua as extremely small crystals to 0.25 mm in tiny vugs in porphyry adjoining the San Jose vein.
Results are presented as [delta][sup.34]S relative to the Vienna Canyon Diablo Troilite (VCDT).