# Does Xenon really covalently bond to oxygen within quartz?

Wikipedia's Xenon; occurrence and production says

Within the Solar System, the nucleon fraction of xenon is $$1.56 \times 10^{-8}$$, for an abundance of approximately one part in 630 thousand of the total mass. Xenon is relatively rare in the Sun's atmosphere, on Earth, and in asteroids and comets. The abundance of xenon in the atmosphere of planet Jupiter is unusually high, about 2.6 times that of the Sun. This abundance remains unexplained, but may have been caused by an early and rapid buildup of planetesimals—small, subplanetary bodies—before the heating of the presolar disk. (Otherwise, xenon would not have been trapped in the planetesimal ices.) The problem of the low terrestrial xenon may be explained by covalent bonding of xenon to oxygen within quartz, reducing the outgassing of xenon into the atmosphere.

I know that crystals can provide unusual amounts of local pressure. For example, this answer explains that ice VII has been discovered at room temperature as inclusions in diamonds.

Question: But I'm still surprised to read about covalent bonding of xenon with oxygen within quartz. How/where has this been observed in naturally occurring mineral or rock, and what is the evidence of covalent bonding?

• This may have some helpful information but it's paywalled so I won't be able to read it for the next few days: Retention of Xenon in Quartz and Earth's Missing Xenon science.sciencemag.org/content/310/5751/1174 – uhoh Mar 5 at 6:53

Evidence is given in Crepisson et al (2019) for xenon (as $$\ce{XeO2}$$) incorporation into silica at high pressure. XRD measurements show changes in the lattice consistent with xenon substituting for silicon in the oxide structure.
• -1 The only thing worse than a link-only answer is where the link is also paywalled. A Stack Exchange answer should at a minimum explain and summarize the relevant information in the link in case the link breaks, or in this case if the link is inaccessible to many/most readers. – uhoh Mar 6 at 22:46