The temperature variation of the elastic constants of calcite

198

LATTICE

E6.

GENERALIZED

CONFERENCE

CONTINUUM

FIELD

ABSTRACTS

AND

REPRESENTATIONS

FOR

J a m e s A. K r u m h a n s 1 4 9 ( L a b o r a t o r y of A t o m i c Cornell University, Ithaca, New York) Various harmonic

representations

approximation

tinous

field

whose

fields

is d e v e l o p e d .

couple-stress leading

terms

lattice. from

The

vibration will

modulus"

Just K = O. --o

of

be

the

data;

long

of

the

TEMPERATURE

in n o r m a l

method

equations

Application

for

(Physics

Work supported by Research Projects

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Manuscript

51.

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not

ELASTIC

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the O f f i c e Agency.

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de

Physl~ue.

lattice

continuum

and

appear

as

of the

harmonic

c a n be

estimated

lengths

this

couple-

application

leads

K in the --o d e f e c t s is

to BZ

instead

indicated.

OF C A L C I T E 50 University,

LEUR VARIATION

Physiques

and

the

the

Another

ET DE

Research

received. in J o u r n a l

a con-

to t h e

Venkateswara

LA B L E N D E

of N a v a l

defining

CONSTANTS

( L a b o r a t o i r e des R e c h e r c h e s Paris, Paris, France).

49.

published

points

of e x t e n d e d

Department,

ETUDE DES CONSTANTES ELASTIQUES A V E C LA T E M P E R A T U R E 51 A. Z a r e m b o v i t c h des S c i e n c e s de

waves;

arbitrary

OF T } ~

wave solids.

of l o n g

to s t u d y

VARIATION

effects

Physics

in the

elastic

6

VIBRATIONS

state

related

waves

1 No.

fields

description

at m a c r o s c o p i c

negligible

Solid

for

the u s u a l at

continuum

P. J a y a r a m a R e d d y Tirupati, India).

ES.

method

approximations

couple-stress

generalization

THE

this

A method

systematically

in a g e n e r a l i z e d

is

E7.

are

and

Vol.

LATTICE

displacement

magnitude

effects

of

Using

continuum

molecular

"effective

discussed.

properties

stress the

are

of l a t t i c e

TITLES

de

la

Facult~

the A d v a n c e d