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Titanite, or sphene (from Ancient Greek σφηνώ (sphēnṓ) 'wedge'), [5] is a calcium titanium nesosilicate mineral, Ca Ti Si O 5. Trace impurities of iron and aluminium are typically present. Also commonly present are rare earth metals including cerium and yttrium ; calcium may be partly replaced by thorium .
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Ancillary Justice is a space opera set thousands of years in the future in which the principal power in human space is the expansionist Radch empire. The empire uses spaceships controlled by AIs, who control human bodies ("ancillaries") to use as soldiers.
Hints and the solution for today's Wordle on Saturday, February 8.
This is a list of minerals which have Wikipedia articles.. Minerals are distinguished by various chemical and physical properties. Differences in chemical composition and crystal structure distinguish the various species.
What happens after an executive order is signed? After a president signs an executive order, the White House sends the document to the Office of the Federal Register, the executive branch's ...
Experts say it’s still too soon to tell how severe this season is and how it compares previous seasons. “Since this season isn’t over yet, it may turn out to be worse in regards to both the ...
Common titanium-containing minerals are anatase, brookite, ilmenite, perovskite, rutile, and titanite (sphene). [27] Akaogiite is an extremely rare mineral consisting of titanium dioxide. Of these minerals, only rutile and ilmenite have economic importance, yet even they are difficult to find in high concentrations.