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This is an accepted version of this page This is the latest accepted revision, reviewed on 4 February 2025. This article is about the chemical element. For other uses, see Iodine (disambiguation). Chemical element with atomic number 53 (I) Iodine, 53 I Iodine Pronunciation / ˈ aɪ ə d aɪ n, - d ɪ n, - d iː n / (EYE -ə-dyne, -din, -deen) Appearance lustrous metallic gray solid ...
90 Sr has been used as a power source for radioisotope thermoelectric generators (RTGs). 90 Sr produces approximately 0.93 watts of heat per gram (it is lower for the form of 90 Sr used in RTGs, which is strontium fluoride). [77] However, 90 Sr has one third the lifetime and a lower density than 238 Pu, another RTG fuel.