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 diffractometer would produce only one family of peaks in the diffraction pattern.
6. XRD analysis and XRD data
- XRD 분석의 단점은 Peak의 분석만을 통해 물질의 성질 만을 판단할 수 있다는 것이다. 정량 분석을 위해서는 Computational한 분석을 통해 면적과 mole양를 바꿔 줄 수 있는 계산을 수행해야 하지만 과정이 매우 복잡하고 정확하지 않기 때문에 정성 분석을 하는데만 널리 활용된다.
Diffraction과 실험과의 관계
X-선 회절법은 결정성물질의 확인과 분석에 이용된다. 결정 중의 모든 원자들은 입사한 X-선을 모든 방향으로 산란시키는데, 산란된 X-선은 보강간섭 또는 상쇄간섭을 일으킬 수 있다. 보강간섭은 결정 내에서 원자들이 규칙적이면서 반복적인 방식으로 배열 되어있는 경우에
P u r p o s e
To understand XRD and analysis JCPDS card, we analyzed and studied the figure of XRD and did research and discuss background knowledge. Also we expect that we can find important information of XRD by doing experiment
Process of experiment
XRD is equipment that use characteristic X-rays. Through characteristic X-rays diffraction peak of material, we can examine closely unk
for identical plane of sample and glass plate.
When we fill up a sample at a holder, if a surface of sample is identical with a surface of holder, A rotation-axis of goniometer is identical with a surface of sample(Fig. 12(a)). If a surface of sample is higher or lower than a surface of holder, a diffraction line is shift to one side(Fig. 12(b)), thus we undergo a difficult analysis.