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IX. THERMAL EXPANSIVITY OF SOLIDS

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emp . 0<br />

K<br />

Sources of Data:<br />

Other References:<br />

Discussion:<br />

0<br />

10<br />

20<br />

30<br />

40<br />

50<br />

60<br />

70<br />

80<br />

90<br />

100<br />

120<br />

L293 - LT<br />

490<br />

490<br />

490<br />

489<br />

48 6<br />

482<br />

475<br />

466<br />

454<br />

441<br />

427<br />

3 93<br />

L2 93<br />

Taken from NBS 29<br />

I1<br />

I1<br />

I1<br />

I1<br />

I1<br />

I1<br />

I1<br />

II<br />

I1<br />

I1<br />

I1<br />

<strong>THERMAL</strong> EXPANSION <strong>OF</strong> MAGNESIUM<br />

--<br />

Ebert 1928<br />

Goens and Schrnid 1936<br />

Head and Laquer 1952<br />

Gruneisen 1910<br />

Hidnert and Sweeney 1928<br />

Anisotropic. The above values were<br />

calculated from the relation, Mean Value =<br />

1/3 (11 1 + 2/3 (L), where (11 1 and (1)<br />

signify the same property measured parallel<br />

and perpendicular, respectively, to the<br />

hexagonal axis.<br />

Table of Selected Values<br />

1' dL<br />

L dT<br />

per OK<br />

0.<br />

0.005<br />

.04<br />

.14<br />

.33<br />

.57<br />

.81<br />

1.03<br />

1.22<br />

1.39<br />

1.54<br />

1.76<br />

I1<br />

II<br />

II<br />

II<br />

I1<br />

I1<br />

I1<br />

I1<br />

II<br />

I1<br />

Temp.<br />

0<br />

K<br />

<strong>IX</strong>-N-1<br />

14 0<br />

160<br />

180<br />

200<br />

220<br />

240<br />

2 60<br />

273<br />

280<br />

293<br />

300<br />

L293 - LT<br />

356<br />

L293<br />

316 11<br />

273 81<br />

227 81<br />

180 'I<br />

132 I'<br />

82.9<br />

50.4<br />

32.9 II<br />

0.0 11<br />

-17 -8 It<br />

--<br />

1 dL<br />

L dT<br />

per .OK<br />

1.94<br />

2.10<br />

2.22<br />

2.32<br />

2.39<br />

2.44<br />

2.48<br />

2.51<br />

2.52<br />

2.54<br />

2.55<br />

11<br />

11<br />

II<br />

11<br />

II<br />

II<br />

11<br />

11<br />

11<br />

II '

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