Uranus nature.

ppm

Rad

Bq ²²⁶Ra/kg

Thor

Bq ²²⁸Th/kg

Potassium

Bq ⁴⁰K/kg

Basalt

0.4 - 4.4 (1)

11 (1)

25 (1)

-

Sand

0.45 (1)

2 - 17 (2)

1 - 76 (2)

34 - 466 (2)

Clay

1.8 (1)

22 - 161 (2)

25 - 127 (2)

161 - 939 (2)

Phosphogypsum

-

19 - 620 (2)

4 - 48 (2)

1 - 680 (2)

Phosphate rock

100 - 650 (1)

490 (3)

53 (3)

19 (3)