Thermodynamic properties and the conditions of formation of heideite FeTi2S4 in meteorites

Details Thermodynamic properties and the conditions of formation of heideite FeTi2S4 in meteorites Thermodynamic properties and the conditions of formation of heideite FeTi2S4 in meteorites

Jan 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987geokh.......64p&link_type=abstract

Geokhimiia (ISSN 0016-7525), Jan. 1987, p. 64-75. In Russian.

Computer Science

Iron Compounds, Meteoritic Composition, Minerals, Thermodynamic Properties, Enthalpy, Entropy, Specific Heat, Sulfides, Titanium Compounds

Scientific paper

To determine the natural conditions for the synthesis of meteoritic heideite, a compound detected in Bustee aubrite by Keil and Brett (1974) and found to have a FeTi2S4 approximate composition, the FeTi2S4 was synthesized in vacuo at 750 C. The thermodynamic properties of FeTi2S4 were determined at temperatures between 4.75 and 338 K, together with the enthalpy of its formation (on the basis of its reaction with metal Zn). The values for the specific heat and the entropy of the heideite were found to be (at 298.15 K) 208.62 J/mol per K, 226.97 J/mol per K, respectively. The enthalpy of heideite formation was determined to be -662 kJ/mol. Thermodynamic analysis shows that, relative to simple sulfides of Ti and Fe, FeTi2S4 is metastable at low temperatures. It is argued that heideite could not have been formed in the protoplanetary nebula environment as a result of the condensation of gaseous phase of solar composition even at C/O = 1. Thus, the genesis of heideite in the Bustee is still unclear.

Affiliated with

Also associated with

No associations

Rating

Thermodynamic properties and the conditions of formation of heideite FeTi2S4 in meteorites does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Thermodynamic properties and the conditions of formation of heideite FeTi2S4 in meteorites, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermodynamic properties and the conditions of formation of heideite FeTi2S4 in meteorites will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1623584