Crystallographic Data for Magnesium Orthovanadate, V2Mg3O8

Contributions of crystallographic data for this section should be sent to W. C. McCrone, 501 East 32nd St., Chicago 16,. 111. Crystallographic Data hk...
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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