In January 2012, it was reported that further analysis of the " Spitzer " observations of EX Lupi can be understood if the forsterite crystalline dust was moving away from the protostar at a remarkable average speed of.
42.
In most ultramafic rocks formed in the Earth's mantle, however, the olivine is about 90 % forsterite endmember, and for that olivine to react completely to serpentine, magnesium must be transported out of the reacting volume.
43.
They detected the infrared signature of forsterite silicate crystals on the disk of dust and gas surrounding the star EX Lupi during one of its frequent flare-ups, or outbursts, seen by " Spitzer " in April 2008.
44.
The rapid reaction of belite hydration in the setting of cement is formally " chemically analogue " to the slow natural hydration of forsterite ( the magnesium end-member of olivine ) leading to the formation of serpentine and brucite in nature.
45.
For example, the olivine group is described by the variable formula ( Mg, Fe ) 2 SiO 4, which is a solid solution of two end-member species, magnesium-rich forsterite and iron-rich fayalite, which are described by a fixed chemical formula.
46.
Reaction 3 describes the hydration of olivine with water only to yield C-S-H ) phases formed along with portlandite ( Ca ( OH ) 2 ) in hardened Portland cement paste after the hydration of belite ( Ca 2 SiO 4 ), the artificial calcium equivalent of forsterite.
47.
Serpentine is stable at high pH in the presence of brucite like calcium silicate hydrate, ( C-S-H ) phases formed along with portlandite ( Ca ( OH ) 2 ) in hardened Portland cement paste after the hydration of belite ( Ca 2 SiO 4 ), the artificial calcium equivalent of forsterite.
48.
Modeling of Io's interior composition suggests that the mantle is composed of at least 75 % of the magnesium-rich mineral forsterite, and has a bulk composition similar to that of LL-chondrite meteorites, with higher iron content ( compared to silicon ) than the Moon or Earth, but lower than Mars.
49.
This rapid reaction is " chemically analogue " to the slow natural hydration of forsterite ( the magnesium end-member of olivine ) leading to the formation of serpentine and brucite in nature, although the kinetic of hydration of poorly crystallized artificial belite is much faster than the slow weathering of well crystallized Mg-olivine under natural conditions.
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