Compositional and X-ray data for Luna 20 feldspar |
| |
| Authors: | IM Steele JV Smith |
| |
| Institution: | Department of the Geophysical Sciences, The University of Chicago, Chicago, Illinois 60637 USA |
| |
| Abstract: | Electron-microprobe analyses of 46 feldspar grains from the 125–500 μm Luna 20 soil separate range only from 94.5 to 97.5 An (mol. %). One grain differs significantly—An87. Minor element contents are low: K < 0.15 wt.%; Mg < 0.14 wt.%; Fe < 0.15 wt.%. Singlecrystal X-ray data for two analyzed grains show sharp b and c diffractions characteristic of primitive anorthite. The 46 grains are similar in composition to those in feldspar-rich fragments found in all the Apollo missions. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
