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Langasite- La3Ga5SiO14 crystals is a new piezoelecrictric materials with the value of electromechanical coupling coefficient, which is, intermediate between this coefficient of a quartz crystal and that of lithium tantalate. The main comparative characteristics of these crystals are given in table below:
Comparative characteristics of piezoelectric crystals.

Characteristics\Crystals Quartz, SiO2 Langasite, La3Ga5SiO14Lithium tetraborate, Li2B2O3Lithium tantalate, LiTaO3
Electromechanical Coupling Factor K2emc, % (BAW) 7.0 15.8 24.0 47.0
Frequency Spacing Δf, % 0.25 0.90 4.00 7.00
Q-factor Q, ×103 100 50 10 2
Temperature Frequency Coefficient TFC, ×10-6/°C 0.5 1.6 6.0 4.0

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LGS Single Crystal Substrate:10x10x0.5 mm, X-Cut, Two Sides Polished
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LGS Single Crystal Substrate: 10x10x0.5 mm, Y-Cut, One Side Polished
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LGS Wafer:3“ Dia x 0.5 mm, X-Cut, Two Sides Polished
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LGS Wafer: 3'' Dia x 0.5 mm, Y-Cut, One Side Polished
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