Lunar soil standard

In Chapter 3, a variety of standard plots is presented. It is instructive to plot these as x plots to see how weU they obey the analytical expression. In the following, the x plot fits will be performed only on original data where available. Creation of the standard plot by some fitting routine or simply using a manual spline fit is in itself a distortion of the data. Indeed, the tho-ria and lunar soils standard plots were created using the insights of the x plot, so the standard plot by definition must fit the x plot perfectly. Similar problems are encountered in analyzing heat of adsorption. 

In Tables 17-21 the standard isotherms from lunar soil as supplied to NASA [46] are given. For these samples the standard curves have been converted here to a-s curves. The first three points were ignored for the... 

The lunar soil is an ideal repository for implanted solar wind elements, as are certain gas-rich meteorites. Deuterium is depleted relative to the terrestrial standard in these materials, the D H ratio of <3 X 10 being consistent with the hypothesis that D is converted into He in the proto-Sun. Ion probe mass spectrometry has been used to study Mg, P, Ti, Cr and Fe which are present to enhanced levels in lunar minerals, indicating an exposure age of approximately 6 X 1Q4 y. The isotopic data indicate that the light isotopes of a number of elements have been preferentially lost from lunar material because of volatilization by micrometeorites or solar wind bombardment. There is some indication, from a study of Ne in gas-rich meteorites, of a large solar flare irradiation during the early history of the Solar System, perhaps related to the T-Tauri phase of the Sun. 

---