Letters. Rock-forming moissanite (natural α-silicon carbide)

@article{DiPierro2003LettersRM,
  title={Letters. Rock-forming moissanite (natural $\alpha$-silicon carbide)},
  author={Simonpietro Di Pierro and Edwin Gnos and Bernard Henry Grob{\'e}ty and Thomas Armbruster and Stefano Michele Bernasconi and Peter Ulmer},
  journal={American Mineralogist},
  year={2003},
  volume={88},
  pages={1817 - 1821}
}
Abstract We report the first occurrence of moissanite (SiC) as a rock-forming mineral (8.4 vol%) in one unique specimen of a terrestrial rock. The sample has a homogeneous, porphyritic texture, and was found as a beach pebble thought to be derived from a Tertiary volcanic province of the Aegean Sea region. The matrix is bluish-colored and consists of very fine-grained brucite, calcite, and magnesite, in which macrocrysts of quartz (25.3 vol%) and moissanite are found. Other accessory phases are… 

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References

SHOWING 1-10 OF 36 REFERENCES
ORIGINS OF CHROMIAN AND ALUMINOUS SPINEL MACROCRYSTS FROM KIMBERLITES IN SOUTHERN AFRICA
A comparison is made of the major- and minor-element compositions of spinel-group minerals that occur as single-crystal macrocrysts in kimberlites from southern Africa (approximately 1500 grains from
Silicon carbide cluster entrapped in a diamond from Fuxian, China
An inclusion found in a diamond from Fuxian contains four blue-green, 6fl SiC crystals, overgrown by apparently younger, colorless grains of the -3C polytype. Structures ofboth polytypes are well
SiC in Diamond and Kimberlites: Implications for Nucleation and Growth of Diamond
Dusty inclusions in diamonds from Fuxian, China contain an assemblage of moissanite (α-SiC) + β-SiC + quartz. Diamondiferous kimberlite from Kimberley, South Africa contains SiC microcrysts with
Experimental determination of the spinel peridotite to garnet peridotite reaction in the system MgO-Al2O3-SiO2 in the range 900 °–1100 °C and Al2O3 isopleths of enstatite in the spinel field
The univariant high-pressure reaction of aluminous enstatite and spinel to pyrope and forsterite in the MgO-Al2O3-SiO2 system has been determined in the temperature range 900 °–1100 °C by
Occurrence and Distribution of Boron‐Conitaining Phases in Sintered ş‐Silicon Carbide
A variety of optical and analytical instruments have been employed to observe and characterize the mlcrostructure and composition of the B-containing phases which occur in sintered α-SiC as a result
Evidence for interstellar SiC in the Murray carbonaceous meteorite
Silicon carbide has been observed in the interstellar medium and in circumstellar shells. Although it might be expected to occur in primitive meteorites that contain other kinds of pre-solar
Chemistry and origin of phlogopite megacrysts in kimberlite
STUDIES of the megacrysts occurring in kimberlite have hitherto neglected the mica megacrysts. We have analysed mica megacrysts from one Lesotho and twelve South African kimberlites. The megacrysts,
...
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