Factbox: Where are strategic materials germanium and gallium produced?

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BEIJING, July 4 (Reuters) - China said on Monday it will impose export restrictions on some gallium and germanium products from Aug. 1 to protect national security interests. Here are some details about gallium and germanium WHERE IS GERMANIUM FOUND? Germanium ores are rare and most germanium is produced as a by-product of zinc production and from coal fly ash. China produces around 60% of the world's germanium, according to the European association Critical Raw Materials Alliance (CRMA), with the rest coming from Canada, Finland, Russia and the United States. China exported 43.7 tons of unwrought and wrought germanium last...