Assertion: aragonite | /r/HasProperty | unstable
Facets:
value: thermodynamically
type: MANNER
value: at standard temperature
type: OTHER
value: at pressure
type: OTHER
value: at the earth's surface
type: LOCATION
value: over inverts to calcite
type: OTHER
value: over geologic time
type: TEMPORAL
Source sentences:
text: Aragonite is thermodynamically unstable at standard temperature and pressure, and tends to alter to calcite on scales of 107 to 108 years.
text: Or, is it the ammonite's shells, originally composed of aragonite, a carbonite mineral, which is unstable at standard temperature and pressure, and reverts to calcite over tens of millions of years.
text: Aragonite is thermodynamically unstable at standard temperature and pressure, and tends to alter to calcite on scales of 107 to 108 years.
text: Aragonite is unstable over geologic time and inverts to calcite.
text: At the Earth's surface, aragonite, a polymorph of calcium carbonate, is thermodynamically unstable, and readily converts to calcite, a process accelerated by heating and mechanical stress.
text: Since aragonite is thermodynamically unstable compared to calcite, transformation of calcite to aragonite at high temperature under ambient condition is impossible .
text: Aragonite is thermodynamically unstable at standard temperature and pressure, and tends to alter to calcite on scales of 10^7 to 10^8 years.