1) Ferroelectric material
Found on
https://www.crosswordclues.com/clue/langbeinites
Langbeinites are a family of crystalline substances based on the structure of langbeinite with basic formula M2M`2(SO4)3. M is a large univalent cation such as potassium, rubidium, cesium, or ammonium). M` is a small divalent cation for example (magnesium calcium, manganese, iron, cobalt, nickel, copper, zinc or cadmium). The sulfate group SO42-.....
Found on
http://en.wikipedia.org/wiki/Langbeinites
No exact match found.
