α-BeH2 (insulator) mmlsi0003" class="mathmlsrc">mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0022369716300233&_mathId=si0003.gif&_user=111111111&_pii=S0022369716300233&_rdoc=1&_issn=00223697&md5=2f5ab923d6fffab45dad08ea67ad5efd">mg class="imgLazyJSB inlineImage" height="17" width="34" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S0022369716300233-si0003.gif">mathContainer hidden">mathCode"><math altimg="si0003.gif" overflow="scroll"><mover><mo>⟹mo><mrow><mn>29.40mn><mspace width=".25em">mspace><mi>GPami>mrow>mover>math> β-BeH2 (metallic) mmlsi0004" class="mathmlsrc">mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0022369716300233&_mathId=si0004.gif&_user=111111111&_pii=S0022369716300233&_rdoc=1&_issn=00223697&md5=ebe18896199cbe50fb88ccaf11fdf2a0">mg class="imgLazyJSB inlineImage" height="17" width="34" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S0022369716300233-si0004.gif">mathContainer hidden">mathCode"><math altimg="si0004.gif" overflow="scroll"><mover><mo>⟹mo><mrow><mn>53.77mn><mspace width=".25em">mspace><mi>GPami>mrow>mover>math> γ-BeH2 (semiconducting).
In BeH2 obtaining high-pressure phases with superconducting properties is possible.
Equilibrium volume collapse from α- to β-phase»β- to γ-phase transition.
Obtained dielectric constant for α-BeH2 is in excellent agreement with earlier reported value.
BeH2 shows anisotropic behavior in all three studied phases.