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Compared to other dating techniques, Nitrogen dating can be unreliable because leaching from bone is dependent on temperature, soil p H, ground water, and the presence of microorganism that digest nitrogen rich elements, like collagen.This page is based on a Wikipedia article written by contributors (read/edit).It is the oxygen "bridge" bonds between silicon atoms that give Si O2 many of its unique properties.
Oxides containing large amounts of Si OH are more hygroscopic, and readily adsorb water molecules from the air.
Deposited oxides often have strained bonds and reduced density.
At temperatures of around 650 to 700 °C, local structural readjustments become possible; oxides annealed at temperatures above 700 °C for a few minutes are normally found to be densified, with reduced hydrogen content and improved stability in subsequent anneals or exposure to ambient moisture.
However, very high temperatures indeed are necessary to completely remove moisture and erase all memory of the deposited structure.
Isolated Si-OH will survive anneals at over 1000 °C, presumably because there's nowhere for the hydrogen to go: it needs to find another hydrogen to be removed as HO.
Furthermore, rotation of the bond about the axis is almost completely free.