立方りっぽう最密さいみつ充填じゅうてん構造こうぞうでした
rippōsaimitsujūtenkōzōdeshita

Noun
Desu Copula

The polite past form of 立方最密充填構造

1. Was the densest cubic packing structure.

Past/Perfective
Polite
Geology