23.04.2013 Views

Management of Commercially Generated Radioactive Waste - U.S. ...

Management of Commercially Generated Radioactive Waste - U.S. ...

Management of Commercially Generated Radioactive Waste - U.S. ...

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

P.38<br />

TABLE P.3.1. (continued)<br />

Occurrence<br />

Element Host Mineral Formula Substitution(a) in Nature Alteration<br />

Tc batisite Na2BaTi2Si4014 R nepheline<br />

syenite<br />

brannerite (U,Ca,Ce)(Ti,Fe)206 R hydrothermal<br />

mineral<br />

Lantha- monazite<br />

nides,<br />

Actinides<br />

(Ce,La)P04 E granites,<br />

pegmatites,<br />

placers,<br />

hydrothermal<br />

deposits<br />

metamorphic<br />

extremely<br />

stable<br />

cheralite (Ce,Ca,Th)(P,Si)0 4 SS rocks sometimes yellow<br />

crust <strong>of</strong><br />

rhabdophanite<br />

xenotime YPO 4 E granites, very stable<br />

pegmatites, alters to<br />

placers, churchite<br />

hydrothermal<br />

deposits,<br />

sandstones<br />

rhabdophanite (Ce,La)P0 4 -H 2 0 E alkali peg- very stable<br />

matites, forms from<br />

brockite (Ca,Th,Ce)PO4.H20 E hydrothermal monazite but<br />

deposits, dehydrates to<br />

grayite (Th,Pb,Ca)PO 4 .H 2 0 E sandstones monazite on<br />

prolonged<br />

storage<br />

churchite YP0 4 2H 2 0 E alkali massifs forms from<br />

limonite ores zenotime<br />

zircon ZrSi04 R acid and alkali metamict<br />

igneous rocks highly resispegmatites,<br />

tant to weaplacers<br />

thering<br />

baddeleyite Zr02 R carbonatites, highly<br />

gabbro, stable<br />

placers,<br />

basalts

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!