roʊˌaɪt noun
a mineral, silicate of manganese, Mn 2 SiO 4 , occurring in orthorhombic crystals.
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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Encyclopedia Britannica
Encyclopedia
tephroite
olivine mineral found only in iron-manganese ore deposits and skarns and in metamorphosed manganese-rich sediments, such as those of Cornwall, Eng., and Franklin, N.J., in the United States. Tephroite (manganese silicate; Mn2SiO4) forms a solid solution series with the olivine fayalite in which iron completely replaces manganese in the molecular structure. For detailed physical properties, see olivine (table)
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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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00:10
Tephroite
is always a great word to know.
So is flibbertigibbet. Does it mean:
| the offspring of a zebra and a donkey. |
| a chattering or flighty, light-headed person. |
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