Earth
Heat

Earth

Section Title: Heat
Table Section Text: None

Isotope	Heat release W/kg isotope	Half-life years	Mean mantle concentration kg isotope/kg mantle	Heat release W/kg mantle

238U	94.6×10−6	4.47×109	30.8×10−9	2.91×10−12

235U	569×10−6	0.704×109	0.22×10−9	0.125×10−12

232Th	26.4×10−6	14.0×109	124×10−9	3.27×10−12

40K	29.2×10−6	1.25×109	36.9×10−9	1.08×10−12

Sentence(s)

The heat-producing isotopes in the Earth are potassium-40, uranium-238, and thorium-232.

final_sentence: The heat-producing isotopes in the Earth are potassium-40, uranium-238, and thorium-232.