The monocrystals of a new narrow-gap solid solution Hg_1-x-y-zCd_xMn_yZn_zTe with the content of manganese and zinc up to 5% are presented. X-ray and mechanical investigations of these crystals have been carried out and their basic electrophysical parameters such as the band-gap energy, the intrinsic carriers’ concentration, the impurity state of samples, and the mobility of charge carriers have been determined. It is shown that a new material has the perfect crystal structure and high microhardness. The empirical formulas for calculations of band-gap energy and intrinsic carrier concentration of monocrystals like that are suggested.
The influence of ultrasonic loading on the galvanomagnetic effects in the Hg_1-x-y-zCd_xMn_yZn_zTe monocrystals have been investigated.
The obtained data allow announcing this material as an alternative one for infrared detectors for 3 - 5 μm and 8 - 14 μm spectral ranges.

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