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Lunar troilite: crystallography.

H T Evans

    Science (New York, N.Y.)
    |January 30, 1970
    PubMed
    Summary
    This summary is machine-generated.

    Troilite crystals from lunar sample 10050 exhibit a hexagonal structure. Researchers confirmed and refined its low-temperature crystal structure using detailed intensity data analysis.

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    Area of Science:

    • Mineralogy
    • Crystallography
    • Lunar Science

    Background:

    • Troilite, an iron sulfide mineral, is found in extraterrestrial samples.
    • Lunar samples provide unique insights into the Moon's geological history.
    • Previous studies proposed a low-temperature crystal structure for troilite.

    Purpose of the Study:

    • To characterize the crystal structure of troilite from lunar sample 10050.
    • To confirm and refine the proposed low-temperature crystal structure of troilite.
    • To investigate the relationship between troilite's crystal habit and its structure.

    Main Methods:

    • Crystallographic analysis of fine, euhedral troilite crystals.
    • Measurement of three-dimensional counter intensity data.

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  • Structure refinement using crystallographic data.

    • Main Results:

    • Troilite crystals display a hexagonal habit consistent with the NiAs-type structure.
    • The low-temperature crystal structure of troilite was confirmed.
    • Refinements provided a more precise understanding of the troilite crystal structure.

    Conclusions:

    • The hexagonal habit of troilite is indicative of its high-temperature structure.
    • The study successfully confirmed and refined the low-temperature crystal structure of lunar troilite.
    • This research contributes to the understanding of mineral structures in lunar samples.