An irreversible expansion of a solid upon heating. Vermiculite commonly shows expansion upon rapid heating (intumesence) owing to the loss of interlayer H2O at relatively low temperatures and the separation of the layers. Slow heating of vermiculite may produce worm-like threads, and it is this characteristic that gives the vermiculite group its name: vermiculari, to breed worms, in Latin.
Atoms or molecules become ions by the gain or loss of electrons, which have a negative charge. A positively charged ion, or cation, involves a loss of one or more electron(s). A negatively charged ion, or anion, involves a gain of one or more electron(s).
Atoms or molecules become ions by the gain or loss of electrons, which have a negative charge. A positively charged ion, or cation, involves a loss of one or more electron(s). A negatively charged ion, or anion, involves a gain of one or more electron(s).
a fluxional bond formed between an ion and a polar molecule. The classic example is where water molecules hydrate a sodium cation. However, the interaction is not restricted to H2O, as many polar organic molecules will form ion-dipole interactions. See fluxional bond.
A fluxional bond formed between an ion and a polar molecule. The classic example is where water molecules hydrate a sodium cation. However, the interaction is not restricted to H2O, as many polar organic molecules will form ion-dipole interactions.
See fluxional bond.
the ratio (Ip) of charge (z) on an ion to the radius (r) of the ion, IP = z/r.
The ratio (Ip) of charge (z) on an ion to the radius (r) of the ion, IP = z/r.
An obsolete, local term for a kaolin forming crusts in the Ione sandstone, California, USA.
See hydrotalcite group.
An obsolete term for annite, siderophyllite, biotite, and hematite.