...Klaus Keil Abstract Daubreelite (FeCr 2 S 4 ) was discovered by Smith (1878) in the Coahuila iron meteorite, and has since been identified in several hexahedrites and octahedrites ( e.g. Heide et al. , 1932; Perry, 1944; El Goresy, 1965, Marshall and Keil, 1965). In stone meteorites it has been...

...Figure 2. SEM BSE images of a porphyritic pyroxene chondrule Ind-1 with sulfide-rich patches, one of which contains daubréelite, in section ICM7. ( a ) Entire chondrule (530 µm diameter) consists of clinoenstatite, interstitial albite, and sulfide patches. ( b ) High-magnification view (small...

...W. A. Tarr Abstract The linnaeite group of sulfides as given by various mineralogists includes several different minerals. Dana 1 includes linnaeite (siegenite), daubreelite, cubanite, and carrollite. He does not include polydymite. In the 1932 edition of Dana-Ford's Textbook of Mineralogy (pp. 430...

... and aubrites) and predicted to exist on Mercury, such as CaS (oldhamite), MgS (niningerite), and FeCr 2 S 4 (daubréelite), are stable at f O 2 below IW-3 but rapidly oxidize to sulfate and/or produce sulfurous gases under terrestrial surface conditions. XANES spectra of these compounds collected to date have...

...-member carrollite (CuCo 2 S 4 ) and of Fe and Cr in daubréelite (FeCr 2 S 4 ) are reported, along with corresponding data for Fe and Ni in a series of “violarites” of compositions Fe 0.25 Ni 2.75 S 4 , Fe 0.75 Ni 2.25 S 4 , and FeNi 2 S 4 . The spectra provide direct evidence that daubreelite is a normal...

...Junko Isa; Chi Ma; Alan E. Rubin Abstract Joegoldsteinite, a new sulfide mineral of end-member formula MnCr 2 S 4 , was discovered in the Social Circle IVA iron meteorite. It is a thiospinel, the Mn analog of daubréelite (Fe 2+ Cr 2 S 4 ), and a new member of the linnaeite group. Tiny grains...

...), with accessory schreibersite, nickelphosphide, perryite, and minor daubréelite, tetrataenite, taenite, and graphite. The chemical composition of the holotype carletonmooreite determined by wavelength-dispersive electron-microprobe analysis is (wt%) Ni 82.8 ± 0.4, Fe 4.92 ± 0.09, and Si 13.08 ± 0.08 (n = 6, total...

... Laar 1967 ), and daubréelite (FeCr 2 S 4 ) ( Raccah et al. 1966 ). Murchisite is also observed in a second isolated olivine (Fo 99 Fa 1 ) grain from Murchison in section MCM1A, occurring in mixtures of serpentine and tochilinite with chromite and eskolaite (Cr 2 O 3 ) nearby ( Fig. 2 ). Thin...

... that disequilibrium formation favors pyrrhotite over troilite and also produces minority schreibersite, daubréelite, barringerite, taenite, oldhamite, and perryite at the metal-sulfide interface. TEM identification of nanophases and analysis of pyrrhotite superlattice reflections illuminate the formation pathway...

...(PO 4 )F, chlorapatite? and whitlockite?), and schreibersite, chromite, enstatite (‘bronzite’), kosmochlor, kosmochlor–augite, olivine, albite, orthoclase, quartz, cohenite, nickelphosphide, altaite, troilite, pyrrhotite, sphalerite, daubreelite, djerfisherite, and native Cu. Czochralskiite forms...

..., nickelphosphide, altaite, pyrrhotite, sphalerite, daubreelite, djerfischerite, whitlockite and native Cu. The inclusions are rimmed by a schreibersite-cohenite halo. Moraskoite forms aggregates up to 1.5 mm in size, with individual grains 20–300 μm across. It is colourless and transparent, with a white streak...

..., carrollite, cuproiridsite, cuprokalininite, cuprorhodsite, daubréelite, ferrorhodsite, fletcherite, florensovite, greigite, indite, kalininite, linnaeite, malanite, polydymite, siegenite, violarite, and xingzhongite. The known mineral species with spinel-type structure are briefly reviewed, indicating...

... (88), 2.307 (47), 1.938 (45), and 1.801 Å (45). Florenskyite is only the fourth phosphide to be described from nature. Its paragenesis may be unique, and may be due to melting of a mineral assemblage including Fe-Ni metal, schreibersite, daubreelite, osbornite, or heideite and subsequent...

... to caswellsilverite. Other associated phases are daubreelite, titanoan troilite, ferromagnesian alabandite, oldhamite, kamacite and perryite. In reflected light, schöllhornite is gray in air and bluish gray in oil. It has distinct reflection pleochroism: in air, brownish gray (brighter) and bluish gray (darker...

...Akihiko Okada; Klaus Keil Abstract Caswellsilverite, NaCrS 2 , occurs in the Norton County enstatite achondrite as anhedral grains up to 1 mm in size. It is associated with daubréelite, titanoan troilite, ferromagnesian alabandite, oldhamite, kamacite, perryite, and a dark-gray phase, also a new Na...

...Klaus Keil; Robin Brett Abstract Heideite, (Fe,Cr) 1+x (Ti,Fe) 2 S 4 occurs as rare anhedral grains up to 100 μ m in diameter in the Bustee enstatite achondrite. Other sulfides in Bustee are titanian troilite, ferroan alabandite, and daubreelite. Heideite (named after Professor Fritz Heide) has...