Abstract
Potassium feldspar has been found, experimentally, to be stable at mantle pressures and temperatures. However, in the presence of water, Seki and Kennedy (1964) synthesised a hydrate phase of comparable structure to the 'barium feldspar hydrate', cymrite. A series of reversal experiments has been done on the reaction:
KA1Si3Os + nH20 ~ KAlSi3Os.nH20 in the pressure range 2-3 GPa and temperature range 450-68~C
KA1Si3Os + nH20 ~ KAlSi3Os.nH20 in the pressure range 2-3 GPa and temperature range 450-68~C
| Original language | English |
|---|---|
| Pages (from-to) | 897 |
| Number of pages | 1 |
| Journal | Mineralogical Magazine |
| Volume | 58A |
| Publication status | Published - 1994 |