The crystal structure is a member of the hexagonal crystal system and consists of tetrahedrally coordinated Zinc and Sulfur atoms that are stacked in an ABABAB pattern.
The structure is closely related to the structure of lonsdaleite, or hexagonal diamond.
As there all orientations of the crystal, rings of different 2θ values are formed
A single crystal specimen in a Bragg-Brentano diffrac
- 일정한 압력과 온도에서 polymorphic transformation을 위한 Driving force와 Polymorphs의 상대적 안정도를 이야기 하기 위해서는 △G = △H - T△S의 관계가 매우 중요하다. 이것을 Diagram으로 옮긴 것이 Figure 5와 같다. 온도가 증가 할수록 Polymorph인 물질들의 H값이 서서히 증가하고, G값은 점점 감소하는 경향을 보이
formation it is easily for us to reach a conclusion.
3. The information what we need are user’s personal data and how phone’s performance satisfy user. Those questions are not too broad or narrow. Because of we can get all of the information from questionnaire.
4. When we get the information from questionnaire. We can use SPSS to analyze it and finally get the answers.
Than we use Brain
crystal bulk
3.1 Design
Molecular formula
CuSO₄5H₂O
Melting point
16136℃
Specific gravity
2.284g/ml
Solubility
52g/100gH₂O (25℃)
Molecular weight
249.69
PH
2.480 (25℃)
system of crystallization
orthorhombic system
Table. 2. CuSO₄5H₂O
Molecular formula
KH₂PO₄
Melting point
96℃
Specific gravity
2.238g/m
To prevent silicon from agglomerating
→ should cool the solid quickly
Rapid cooling
→ large thermal gradient in crystal
Postulate K=20W/m K
Diameter of wafer: 10-20 cm
L (latent heat of fusion) = 340 cal/g
Temperature gradient in silicon CZ (dT/dx) : 100°C/cm