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Wadsleyite is an
orthorhombic mineral with the
formula β-(Mg,Fe)2SiO4. It was
first found in
nature in the
Peace River meteorite from Alberta, Canada....
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inferred to be
present in
large quantities in the Earth's mantle. Olivine,
wadsleyite, and
ringwoodite are
polymorphs found in the
upper mantle of the earth...
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exothermic phase transition to the sorosilicate,
wadsleyite and, at
about 520 km (320 mi) depth,
wadsleyite transforms exothermically into ringwoodite, which...
- of gas
around a
forming star. Two
polymorphs of
forsterite are known:
wadsleyite (also orthorhombic) and
ringwoodite (isometric,
cubic crystal system)...
- e.,
contrary to
forsterite there is no
intermediate form
analogous to
wadsleyite;
under the
conditions prevailing in the
upper mantle of the Earth, the...
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Mantle Transition Zone is
mainly composed of 60 vol% olivine-polymorphs (
wadsleyite, ringwoodite) and ~40 vol%
majoritic garnet. The top and
bottom boundary...
- the
transition zone (approximately 410–660 km [250–410 mi]), in
which wadsleyite (≈ 410–520 km [250–320 mi]) and
ringwoodite (≈ 525–660 km [326–410 mi])...
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predicted by the
single transition from α- to β- Mg2SiO4 (olivine to
wadsleyite). From the
Clapeyron slope this
discontinuity is
expected to be shallower...
-
Vishnevite Vivianite Vladimirite Vlasovite Volborthite Vuagnatite Vulcanite Wadsleyite Wagnerite Wairakite Wakabayashilite Wakefieldite Walfordite Wardite Warikahnite...
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phases at the
transition zone
between Earth's
upper and
lower mantle,
wadsleyite and ringwoodite,
could potentially incorporate up to a few
weight percent...
