New measurement technique for characterizing small extraterrestrial materials by X‐ray diffraction using the Gandolfi attachment
New measurement technique for characterizing small extraterrestrial materials by X‐ray diffraction using the Gandolfi attachment
复制标题
使用 Gandolfi 附件通过 X 射线衍射表征小型外星材料的新测量技术
DOI:
10.1111/maps.13491
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发表时间:
2020
影响因子:
2.2
通讯作者:
Kimura Makoto
中科院分区:
文献类型:
--
作者:
Imae Naoya;Kimura Makoto
Identification and characterization of small extraterrestrial samples, such as small Antarctic meteorites <~1 cm, require the development of convenient laboratory‐based nondestructive analytical techniques using X‐ray diffraction (XRD). We explore the characterization criteria using an X‐ray diffractometer with a Gandolfi attachment using sub‐mm small fragments and powder aggregates for various kinds of stony meteorites and develop a new analytical technique. We primarily focus on olivine and pyroxene because they are the most abundant and important minerals for stony meteorite classification. A new calibration is performed to estimate the FeO content of the olivine in unequilibrated ordinary chondrites, which is useful for determining the meteorite chemical group irrespective of powder aggregate diameter but dependent on fragment grain diameter. This is because X‐ray intensity absorption is more effective for grains than for powders. Clinoenstatite (Cen) and orthoenstatite (Oen) were distinguished using the presence or absence of the isolated Oen 511 index peak. The method is also applied to other stony meteorites including carbonaceous chondrites and achondrites. The XRD results are consistent with studies based on polished sections involving textural observations by scanning microscope and chemical compositions of the constituent minerals. The new measurement technique presented here is convenient because of its use in air by the laboratory‐based X‐ray diffractometer, which makes it useful for the initial analyses of restricted extraterrestrial sample characterization.
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影响因子:
5
作者:
O. Okano;N. Nakamura;K. Nagao
通讯作者:
K. Nagao
DOI:
10.5940/jcrsj.56.149
发表时间:
2014
期刊:
影响因子:
--
作者:
K. Sugiyama;A. Nakatsuka
通讯作者:
A. Nakatsuka
影响因子:
0.7
作者:
Tomoki Nakamura
通讯作者:
Tomoki Nakamura
DOI:
--
发表时间:
1989
期刊:
影响因子:
--
作者:
K. Tomeoka;H. Kojima;K. Yanai
通讯作者:
K. Yanai
影响因子:
2.2
作者:
A. Udry;Z. Wilbur;R. R. Rahib;F. McCubbin;Kathleen E. Vander Kaaden;T. Mccoy;K. Ziegler;J. Gross;C. DeFelice;L. Combs;B. Turrin
通讯作者:
B. Turrin