Fulminating gold

Fulminating gold is a light- and shock-sensitive yellow to yellow-orange amorphous heterogeneous mixture of different polymeric compounds of predominantly gold (III), ammonia, and chlorine that cannot be described by a chemical formula. Here, the word fulminating has its oldest meaning, "explosive" (from Latin fulmen, lightning, from verb fulgeo, 'I shine'); the material contains no fulminate ions. The best approximate description is that it is the product of partial hydrolysis of ∞ 3 Wikipedia

Data from the Hazardous Materials Table