3-13
x
xl
y
f
z
q
q
The AT, FC, IT, SC, BT, and SBTC-cuts are some of the cuts on the locus of zero temperature coefficient cuts.  The LC is a “linear coefficient” cut that has been used in a quartz thermometer.
Y-cut: » +90 ppm/0C
(thickness-shear mode)
X-cut: » -20 ppm/0C
(extensional mode)
90o
60o
30o
0
-30o
-60o
-90o
0o
10o
20o
30o
AT
FC
IT
LC
SC
SBTC
BT
q
f
Text Box: Singly Rotated Cut
Singly
Rotated
Cut
Text Box: Doubly Rotated Cut
Doubly
    Rotated
        Cut
Zero Temperature Coefficient Quartz Cuts
------------------------
A. Ballato, “Doubly rotated thickness mode plate vibrators,” in Physical Acoustics, Vol. XIII, pp. 115-181, Academic Press, 1977.