Silver iodide

From Glossary of Meteorology



silver iodide

An inorganic chemical compound, AgI, that has a crystalline structure (symmetry; lattice spacing) similar to ice and a very low solubility in water, and can be easily generated as an aerosol.

It was discovered by Bernard Vonnegut in 1947 after a search of the crystallographic tables as an effective nucleating agent for supercooled water. In cloud seeding applications it is usually combined with small amounts of other materials (e.g., bromine, chlorine, copper) to enhance nucleating properties through change of lattice dimension to approach more closely that of ice.

Vonnegut, B. 1947. The nucleation of ice formation by silver iodide. J. Appl. Phys.. 18. p. 593.


Copyright 2022 American Meteorological Society (AMS). For permission to reuse any portion of this work, please contact permissions@ametsoc.org. Any use of material in this work that is determined to be “fair use” under Section 107 of the U.S. Copyright Act (17 U.S. Code § 107) or that satisfies the conditions specified in Section 108 of the U.S.Copyright Act (17 USC § 108) does not require AMS’s permission. Republication, systematic reproduction, posting in electronic form, such as on a website or in a searchable database, or other uses of this material, except as exempted by the above statement, require written permission or a license from AMS. Additional details are provided in the AMS Copyright Policy statement.