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・ Kreditbanken
・ Kreditech
・ KredoBank
・ Kredu min, sinjorino!
・ Kree
・ Kree (disambiguation)
・ Kree Harrison
・ Kree Woods
・ KReeD
・ Kreegah bundolo
・ Kreeger Museum
・ Kreek
・ Kreekhuizen
・ Kreenheinstetten
・ Kreenholm
KREEP
・ Kreep (song)
・ KREEPA
・ Kreepen
・ Kreeri
・ Kreesha Turner
・ Kreesten Madsen
・ Kreeta Haapasalo
・ Kreevins
・ KREF
・ Krefeld
・ Krefeld Airfield
・ Krefeld Hauptbahnhof
・ Krefeld II – Wesel II
・ Krefeld Pinguine


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KREEP : ウィキペディア英語版
KREEP

KREEP, an acronym built from the letters K (the atomic symbol for potassium), REE (Rare Earth Elements) and P (for phosphorus), is a geochemical component of some lunar impact breccia and basaltic rocks. Its most significant feature is somewhat enhanced concentration of a majority of so-called "incompatible" elements (those that are concentrated in the liquid phase during magma crystallization) and the heat-producing elements, namely radioactive uranium, thorium, and potassium (due to presence of the radioactive 40K).
==Typical composition==
The typical composition of KREEP includes about one percent, by mass, of potassium and phosphorus oxides, 20 to 25 parts per million of rubidium, and a concentration of the element lanthanum that is 300 to 350 times the concentrations found in carbonaceous chondrites.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「KREEP」の詳細全文を読む



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