
Difraksi Kristal
Presentation
•
Physics
•
University
•
Practice Problem
•
Hard
Evi Suaebah
FREE Resource
29 Slides • 7 Questions
1
Analisis Struktur
Kristal: Difraksi
Sinar-X, Neutron &
Elektron
Kuliah Pert. 4&5
2
Open Ended
Apa yang anda ketahui tentang difraksi?
3
Perangkat XRD
“Bruker”
D8 ADVANCE
4
Perangkat XRD
“Bruker”
D8 ADVANCE
5
6
Multiple Choice
Berapakah panjang gelombang Cahya Tampak
300 nm -700 nm
380 nm-700 nm
400 nm-680 nm
200 nm - 500 nm
7
8
9
10
Prinsip Kerja XRF
1.
Elektron di kulit K
terpental keluar dari
atom akibat dari
radiasi sinar X yang
datang. Akibatnya,
terjadi kekosongan/
vakansi elektron
pada orbital.
11
Prinsip Kerja XRF
2.
Elektron dari kulit L
atau M “turun”
untuk mengisi
vakansi tersebut
disertai oleh emisi
sinar X yang khas
dan meninggalkan
vakansi lain di kulit L
atau M
12
Prinsip Kerja XRF
3.
Saat vakansi
terbentuk di kulit L,
elektron dari kulit M
or N “turun” untuk
mengisi vakansi
tersebut sambil
melepaskan Sinar X
yang khas.
13
14
Open Ended
Dari beberapa penjelesan yang sudah disampaikan, bagaimana proses terjadinya difraksi pada kristal?
15
16
17
18
19
20
21
22
23
24
Interaksi Elektron & Materi (3)
25
Kristal yang digunakan pada
WDS
Kristal
Bidang
2d (Å)
Range Nomo Atom
Garis K
Garis L
LiF
(220)
2,848
>Ti (22)
> La (57)
LiF
(200)
4,028
> K (19)
>Cd (48)
PE
(002)
8,742
Al (13)-K(19)
-
TAP
(001)
26,4
F (9) – Na (11)
-
LSM
-
50-120
Be (4) – F (9)
-
Jenkins, R. (1988) “X-ray Fluorescence Spectrometry”, John Wiley & Sons, New York
• Sequential WDXRF Spectrometer
• Simultaneous WDXRF Spectrometer
26
Poll
Dari pernyataan di bawah ini, faktor apa yang mempengaruhi sinar pantulan pada kristal, kecuali
panjang gelombang
jarak antar kisi
sudut datang
HKL bidang
27
Interaksi Elektron & Materi (4)
28
Aplikasi XRF
Certified Value
ICPMS
XRF SQX
XRF Quantitative
Aluminum
6,880
6,500
7,900
6,900
Calcium
359,500
370,000
400,000
363,440
Iron
3,900
4,300
5,000
4470
Magnesium
2,500
2,510
3,300
2920
Manganese
194
144
170
130
Phosphorus
175
302
440
180
Potassium
2,300
2,450
2,700
2420
Silicon
32,000
32,000
28,000
33,470
Sodium
150
304
ND
450*
Strontium
250
245
290
190*
Titanium
420
192
440
370
Non-Certified Elements
Chromium
16
260
Sulfur
NA
0.68
1,360
Zirconium
11
40
ND - Not Detected. * Near the LOD.
Table 1. NIST SRM 1c, Argillaceous Limestone, ppm (ug/g)
29
30
Bidang (110)
Bidang (100)
Bidang (210)
31
Multiple Choice
Berpakah panjang kisi kristal (a) dari simple cubic
3 angstrom
2 angstrom
2 angstrom
212 angstrom
32
33
34
Fill in the Blanks
Type answer...
35
AFM analysis of the sample Au(40nm)/SiO2 after flame
annealing
36
Open Ended
Tenentukan hkl (index) dan jarak antar
bidang kristal (d) dari 7 kisi bravais (Triklinik,
Monoklinik, Orthorombik, Ortogonal,
Kubik,Trigonal, dan Heksagonal).
Analisis Struktur
Kristal: Difraksi
Sinar-X, Neutron &
Elektron
Kuliah Pert. 4&5
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