There is a kind of ore. I don't know what that is. Is it harmful to leave it at home?

Speaking of minerals, the scope is a bit large. Let's talk about radioactive mineral specimens first. Generally speaking, there are three types of mineral targets with strong radioactivity.

One is uranium-bearing substances, such as crystalline uranium, pitchblende, uranium black, ilmenite, uranium amphibole, barium-potassium-uranium, copper-uranium mica and uranium mica. Because these minerals are generally rich in uranium, they are highly radioactive.

Second, some rare earth minerals, namely, yttrium niobate, xenotime, yttrium beryllium, Fegersonite, calcium niobate and re-diluted gold ore. Radioactivity will change.

Three, there are seven kinds of rare earth minerals commensurate with "XX stone": soluble stone, fangShi Ying, pyrochlore, spar,

Monazite, phoenix stone, thorium stone, chalcopyrite, etc.

Unless you are a collector who often goes to the international mining exhibition to receive goods, the above mining standards are all. Otherwise, these daily lives will not be seen.

In addition, there are some common minerals that can be used as gems, and some radioactivity may remain, such as diamonds, sapphires and topaz. Which has not been left for a period of time after being irradiated. Some minerals may be mixed with radioactive elements during mineralization, such as fluorite and smoke crystals.

samarskite

Yttrium niobium ore

Chemical composition: Y-Y (Fe, U)(Nb-Nb, Ta-Ta) 2O-8, with extremely complicated composition, mainly composed of niobium-tantalum minerals such as iron, uranium and yttrium rare earth elements, and niobium-tantalum may be completely isomorphic, including titanium, thorium, cerium, calcium, aluminum, magnesium, manganese and lead. Varieties are: calcium yttrium niobate (calcium yttrium aluminum garnet), with CaO content as high as 8%; Chlopinite containing10tio2; Fe-Nb-YTTRITE (Fitinhofeite), containing 23% FeO；; Ischikawaite contains UO2 as high as 23, and its specific gravity is above 6.2. Lead-bismuth ore with PbO as high as 8,

Genesis and occurrence: It occurs in the granite pegmatite long rock mass zone and coexists with rare element minerals such as niobite, fergusonite, xenotime, monazite, beryl, feldspar, mica and quartz. Yttrium niobate is also found in alluvial placer.