Standard X-ray Diffraction Powder Patterns: Section 4. Data for 103 Substances Page: 30
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Neodymium Vanadate, NdVO4 (tetragonal)
Powder data card. No. 6-0217, Milligan, Watt,
and Rachford [1] 1949.
Additional published patterns. None.
NBS sample. The sample of neodymium
vanadate was prepared at NBS by adding a hot
solution of sodium orthovanadate to a hot acidic
solution of neodymium chloride. After the sample
was dried at 110 C for 1 hr, it was heated for
20 min at 700 C to improve the crystallinity.
Spectrographic analysis showed the following
major impurities: 0.1 to 1.0 percent silicon and
0.001 to 0.01 percent each of aluminum, calcium,
copper, and magnesium. Rare-earth impurities
were less than 0.1 percent of total rare-earth
content.
The color of the sample was pale blue. The
indices of refraction could not be determined be-
cause the sample was too fine-grained.
The d-values of the three strongest lines are
3.664, 2.732, and 1.881k
Structural data. Milligan, Watt, and Rachford
[1] in 1949 determined that neodymium vana-
date has the zircon structure, the space group
D -I4/amd (No. 141) and 4(NdVO4) per unit
cell.
Lattice constants
a c
1949 Milligan, Watt, and
Rachford [1] ------- 7. 31 6. 42
1965 National Bureau of
Standards, sample
at 25C 7-------- --- 7.3290 6. 4356
S0. 0003 0. 0006
The density of neodymium vanadate calculated
from the NBS lattice constants is 4.979 g/cm3
at 25 C.
Reference
[1] W. O. Milligan, L. M. Watt and H. H. Rachford,
X-ray diffraction studies on heavy metal orthovana-
dates, J. Phys. Chem. 53, 227-234 (1949).Internal Standard W,
a=3.1648 1; temp. 25 C
hkl Cu X 1.5405 1
d I101
200
211
112
220
202
301
103
321
312
400
213
411
420
303
004
332
204
501
224
512
440
600
404
215
611
532
.620
424
325
613, 116
640
543, 444
552
633, 316
624
732
723, 336
660
653, 516A
4. 835
3. 664
2. 921
2. 732
2. 590
2. 419
2. 284
2. 059
1. 938
1. 881
1. 8325
1. 7951
1. 7131
1. 6391
1. 6122
1. 6086
1. 5219
1. 4733
1. 4293
1. 3670
1. 3121
1. 2954
1. 2214
1. 2086
1. 1977
1. 1840
1. 1704
1. 1584
1. 1481
1. 0874
1. 0504
1. 0163
1. 0094
0. 9867
.9734
.9404
.9220
.9113
.8637
.859631
100
11
73
19
5
16
10
12
57
16
5
2
13
3
6
16
13
6
12
12
5
5
6
5
3
10
5
10
2
6
4
4
5
6
6
3
2
3
9Potassium Acid Phthalate, CH,4(COOH)(COOK) (orthorhombic)
Powder data card. No. 1-0020, Hanawalt,
Rinn, and Frevel [1] 1938.
Additional published patterns. None.
NBS sample. The sample of potassium acidphthalate was obtained from J. T. Baker Chemical
Co., Phillipsburg, N.J. Spectrographic analysis
showed the following major impurities: 0.001 to
0.01 percent each of aluminum, sodium, and
rubidium.30
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Swanson, Howard E.; Morris, Marlene C. & Evans, Eloise H. Standard X-ray Diffraction Powder Patterns: Section 4. Data for 103 Substances, report, June 28, 1966; Washington D.C.. (https://digital.library.unt.edu/ark:/67531/metadc13212/m1/36/: accessed July 3, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.