The cache is not at the posted coordinates. In order to find this cache, you’ll need to deal with some heavy metals!
Lead - Indium
Iron + Nickel
Thallium - Mercury
Germanium + Chromium + Copper + Arsenic
Chromium
Silver + Gold + Cobalt + 2 Zinc

You can validate your puzzle solution with certitude.
Chmmyr uvag: Gnagnyhz + Orelyyvhz + Ynagunahz
Pnpur uvag: Pnpur vf haqre zrgny (cyhf fbzr bgure zngrevnyf), vafvqr zrgny, unatvat sebz zrgny, naq va n zrgny pbagnvare.