3-37
Z
Y
X
Y’
0~50
Y
Z
X
base
arm
a)  natural faces and crystallographic axes of quartz 
b)  crystallographic orientation of tuning fork 
c)  vibration mode of tuning fork 
Quartz Tuning Fork
   See also “Quartz Wristwatch Accuracy vs. Temperature” in Chapter 4, and “Tuning Fork Resonator Sensors” in Chapter 9.

E. Momosaki, “A Brief Review of Progress in Quartz Tuning Fork Resonators,” Proc. 1997 IEEE Int'l Frequency Control Symposium, pp. 552-565, 1997.

J. H. Staudte, “Subminiature Quartz Tuning Fork Resonator,” Proc. 27th Ann. Symp. on Frequency Control, pp. 50-54, 1973.