| 单词 | armalcolite |
| 释义 | armalcolite Min.|ɑːˈmælkəʊlaɪt|
[f. the names of the three U.S. astronauts Neil Armstrong, Edwin Aldrin, and Michael Collins who brought the sample from the moon + -ite1.]
An orthorhombic titanate of magnesium and iron, (Mg,Fe2+)Ti2O5, first discovered in lunar rocks.
1970A. T. Anderson et al. in Proc. Apollo 11 Lunar Sci. Conf. I. 55 Armalcolite (Fe0·5Mg0·5Ti2O5), a new magnesium-rich opaque oxide related to the pseudobrookite series, was discovered independently by six research groups in their examination of different samples of the lunar material collected from Mare Tranquillitatis. Ibid. 56 Armalcolite is opaque, gray and distinctly pleochroic. 1973Times 28 Sept. 7/5 Moon samples of armalcolite..were first analysed in the United States in 1969. Armalcolite has been since found in great abundance on the Moon's surface by the Apollo 17 astronauts. 1975Physics & Chem. of Earth IX. 305 The first terrestrial occurrence of armalcolite..is reported from DuToitspan [in South Africa]. 1978Pasachoff & Kutner University Astron. xiv. 398 (caption) A crystal of armalcolite..examined under a polarization microscope. |
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