184.
Crystallographic Data for Magnesium Orthova nadate, V,Mg30, ANDRE QURIF Laboratoire d'Electrostatique et de Physique du Metal, lmtitut Fourier, Grenoble, France
rompourid has been preparwl by heating R I O W I ~ up tn 700" C. a mixture of vanadium pntoside nnrl niqnesiiim carbonatr. HIS
Crystallographic Qata
d (nhpd.) d (,C'aIvd.) I (Yip.)
5.6 4.4 3.31 3.22 2.97 2.8'2 2.64 2.52 2.46 2.422 2.33 2.08
X-RAYDIFFRACTION I)ATA System. Orthorhombic..
Cell size.
a = 8.32
A. b
= 11.43 A.
c = 6.05 A.
Formula weights per cell. 4. Density. 3.478 (calculated). Space group. DE - A b a m. Cell dimensions hare been measured using the powder method with a camera 76.4 mm. in diameter and chromium radiation.
2.06
.4m 411
UTERATURE CITED
(1) Durif, A.! Bertsut,
de rdaum, in preea.
'060
E. F., J . phys. r l
of cryatallographic data for thia section should be eent to W.C. \lcCrnne, 501 Eant 32nd St., Chicago 16, Ill. ('ONTRIBUTIONS
1.934
w w W
S W WW
S W W
I . 6-2 1.605 1.586 1.574 1.562
{E
1.507
{4%2
1.483 1.463
080 460
1.846 1.i81 1.733 1.701
(V
3u
1%
rnrr w Is.
m
mw
1.582 1.569 1.513
W
mw
ww ww
S
'1.469
1.428 1.404
M
1.370
ww
ww
1.337 1.293 11.m
W
rn
1.272
513
/kt73 Ed
m
1.251
453 373
mvi mw mw
1.682 1.642 1.612
1.424 1.400 1.365 1.335 1.291
04-4
m
d (Calrd.) I(1'is.)
1.497
371
S
n-
a-94
1.669
433 062
ww
480
1.223
1.223
1.214 1.177
1.214 1.177
mw n m
rnS
lndtvment: Beckman IR-4 prism double beam Sampb Phase: Solution in carbon disulfide
Cell Windows: ROBERT 1. KEEN Atomics Intnndonol, 6 n o g a Park, Calif.
440
w
1.881)
infrared Analysis of Biphenyl and Isomeric Terphenyl Mixtures
d (Ohd.)
'520 j.511 162 360 00.1
S
'2.08 .2.08 ,2.07 1.932 * 1.955 1.933
hkl
KBr
Absorbonce Measuremennt: Calculation:
Base line-
Inverse matrixGraphicalI
PointSuccessive 0pprox.-
Rdative Absorbance"-Analyticol Matrix: Compocrmt/h
I 2 3 4
11.9 0.045 0.000 0.000 2.128
12.5 0.000 0.000
17.9 0.000 1.050
18.4 0.362
0.665
O.OO0
0.000
0.OOO
0.000
0.000
0.OOO
Mahdal Pudw Biphenyl, o-terphenyl, and p-terphenyl 99.9 +% pure. m-Terphenyl 99.0% (contains 1.O% p-terphenyl).
-I
-,
-I
-I
-l
-I
-i
-I
-l
i-
1 --i
Comments: Valley at 12.3 used os base point for m- and p-terphcnyl; valley at 18.2 used as base point fur a-terphcnyl and biphenyl. Absorbonce of rn-terphenyl at 1 1.9 has been corrected for p-terphenyl impurity. a Relative obsarbances are given as the slope of the Beer's law cancentralion curves used expressed in terms of absorbance per 100% of cadiluent.
VOL. 31, NO. 10, OCTOBER 1959
1741
