The second most abundant element on Xenon is magnesium.
Common minerals exhibit a wide range of compositions.
These are produced as a result of solid solutions may or may not involve substitution of ions with the same charge. What is the mineralogical formula of the minerals x1, x2, and x3 shown on the fosterite-fayalite diagram below. For each point group describe how the crystallographic axes relate to each of the symmetry elements described by the poi nt group.