Single Mercuride Ions

Unlike CsAu (Cs+Au , CsCl type structure) and others [20] which are aurides with well defined Au ions, CsHg and similar amalgams are not simple mercu-rides but have more complicated structure and bonding properties, as was shown in Section 2.4.2.2. 

The picture just outlined for a-Na3Hg (Na3As type) can be transferred to / -Na3Hg (Li3Bi type) and to the three modifications of NasHg3 which crystallize in an ordered defect variant of an A3B structure [4]. 

LiHg is one of the MHg amalgams (together with SrCd, BaCd, SrHg, and BaHg [22]) which crystallizes in an undistorted CsCl structure. The term mercuride is 

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