ⓘ Romboedr - hamma yokdari teng romblar bolgan parallelepiped. Bazi kristallarning, Mas, island shpatining kristallari R. shaklida boladi. Parallelepiped faqat uc ..

                                     

ⓘ Romboedr

Romboedr - hamma yokdari teng romblar bolgan parallelepiped. Bazi kristallarning, Mas, island shpatining kristallari R. shaklida boladi. Parallelepiped faqat uchinchi tartibli simmetriya oqiga ega bolgandagina R. boladi.