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Ringwoodite is a high-pressure
phase of Mg2SiO4 (magnesium silicate)
formed at high
temperatures and
pressures of the Earth's
mantle between 525 and 660 km...
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transition zone
between Earth's
upper and
lower mantle,
wadsleyite and
ringwoodite,
could potentially incorporate up to a few
weight percent of
water into...
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transforms exothermically into
ringwoodite,
which has the
spinel structure. At a
depth of
about 660 km (410 mi),
ringwoodite decomposes into
silicate perovskite...
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increasing depth.
Below a
depth of 670 km (420 mi), due to
pressure changes,
ringwoodite minerals change into two new
denser phases,
bridgmanite and periclase...
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Below a
depth of 660 km,
evidence suggests due to
pressure changes ringwoodite minerals change into two new
denser phases,
bridgmanite and periclase...
- 410–660 km [250–410 mi]), in
which wadsleyite (≈ 410–520 km [250–320 mi]) and
ringwoodite (≈ 525–660 km [326–410 mi]) are
stable the
lower mantle (approximately...
- geochemist, and the 1988
recipient of the
Wollaston Medal. The
mineral ringwoodite is
named after him.
Ringwood was born in Kew, only
child of
Alfred Edward...
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density at a
depth of 660
kilometers (410 mi). At a
depth of 660 km,
ringwoodite (γ-(Mg,Fe) 2SiO 4)
decomposes into Mg-Si
perovskite and magnesiowüstite...
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Transition Zone is
mainly composed of 60 vol% olivine-polymorphs (wadsleyite,
ringwoodite) and ~40 vol%
majoritic garnet. The top and
bottom boundary of the Mantle...
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undergoes a
phase transition to ahrensite, the iron-bearing
analogue of
ringwoodite, i.e.,
contrary to
forsterite there is no
intermediate form analogous...
