1 – Tajriba ish Simmetriya elementlarini va kristallarning oddiy shakllarini o’rganish. Ishning maqsadi

Topshiriq – Tajriba ishni qanday bajarishni o‘rgangandan so‘ng talaba tajriba ishi davomida kristall madellarda simmetriya elementalarini aniqlab har bir kristall modeli uchun uning formulasini chiqarish.
Buning uchun:
l.Ish daftari;
2.Qalam, ruchka, chjizg'ich;
3.Kristall panjaralari modellari.


Hisobot turi: Mashg'ulot yakunida talabalar 1.1-jadval asosida hisobot topshiradilar.
15-20 ta mineralga ta’rif beradilar.
1.1-jadval

№ t/r	Minerallar nomi	Singo-niyasi	Kategoriyasi	Simmetriya o’qi	Simmetriya tekisligi	Simmetriya markazi
1	Galit	Kub	Yuqori	3L44L66L2 Uchta to’rtinchi darajali, to’rtta oltinchi darajali va oltita ikkinchi darajali simmetriya o’qi	9P to’qizta simmetriya tekisligi	C simmetriya markazi

1.2-jadval
32 ko‘rinishdagi simmetriyalar nomi va formulasi.

Katego-riya	Elementar paral-lepipedni konstan- ti (o‘zgarmas) va singoniyasi	Eng oddiy umumiy shakli bo‘yicha ko‘rinishi nomi	Simmetriya formulasi	German – Mogen bo‘yicha belgisi
Quyi	Triklin a ≠ b ≠ c α ≠ β ≠ γ ≠ 90^0	Monoedr	L1	1 1 m 2 2/m mm2 222 2/m2/m2/m (mmm)
		Pinokoidal	C
	Monoklin a ≠ b ≠ c α = γ = 90^0 β ≠90^0	O‘qsiz diedr	P
		O‘qli diedr	L2
		Prizmatik	L2PC
	Romb a ≠ b ≠ c α = β = γ = 90^0	Rombo – piramidal	L2 2P
		Rombo – tetraedr	3L2
		Rombo – dipiramidal	3L23PC
O‘rta	Tetragonal a = b ≠ c α = β = γ = 90^0	Tetragonal – piramidal	L4	4 4/m 4mm 422 4/m2/m2/m (4mm) 4 42m 3 3 3m 32
		Tetragonal - dipiramidal	L4PC
		11. Ditetragonal – piramidal	L44P
		12. Tetragonal – trapetsoedr	L44 L2
		13. Ditetragonal – dipiramidal	L44 L25PC
		14. Tetragonal - trapetsoedr	Li4
		15. Tetragonal - skalonedr	Li42 L22P
	Trigonal a = b ≠ c α = β = 90^0 γ = 120^0	16. Trigonal – piramidalli	L3
		17. Romboedr	Li6C
		18 Ditrigonal – piramidalli	L33P
		19. Trigonal – trapetsoedr	L33 L2
		2O. Ditrigonal - skalenoedr	Li63 L23PC
	Geksogonal a = b ≠ c α = β = 90^0 γ = 60^O	21. Geksagonal – piramidal	L6	32/m (3m) 6 6/m 6mm 622 6/m2/m2/m (6/mmm) 6 6m2
		22. Geksoganal – dipramidal	L6PC
		23. Digeksagonal piramidal	L66P
		24. Geksoganal – trapetsoedr	L66 L2
		25. Digeksagonal – dipiramidal	L66 L27PC
		26. Trigonal – dipiramidal	Li6= L3P
		27. Ditrigonal – dipiramidal	L6i3 L23P= L33 L24P
Yuqori	Kub a = b = c α = β = γ = 90^0	28. Tritetraedr	3L24 L3	23 2/m3(m3) 43m 432 4/m32m (m3m
		29. Didodekaedr	3L24 Li63PC
		30. Geksatetraedr	3Li44 L36P
		31. Trioktaedr	3L44 L36 L2
		32. Geksaoktaedr	3L44 Li66 L29PC