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The ground state and the thermodynamics of a spin-1/2 asymmetric diamondIsing--Heisenberg chain are considered. For the $XYZ$ anisotropic Heisenberginteraction, the exact calculations of the free energy, entropy, heat capacity,magnetization, and magnetic susceptibility are performed using the method ofdecoration-iteration transformation. In the case of antiferromagneticinteractions (Ising and $XXZ$ anisotropic Heisenberg ones), the ground state,magnetization process, temperature dependence of the magnetization, magneticsusceptibility, and heat capacity are investigated. The influence of geometricfrustration and quantum fluctuations on these characteristics is studied.

Spin-1/2 asymmetric diamond Ising-Heisenberg chain