The binary systems Ca-Sn, Ba-Sn, Eu-Sn, Yb-Sn, Sr-Pb, Ba-Pb, and Eu-Pb do not contain Cr5B3-like A(5)Tt(3) phases when care is taken to exclude hydrogen from the reactions (Tt = tetrel, Si-Pb). All form ternary A(5)Tt(3)H(x) phases (x less than or equal to 1) with "stuffed'' Cr5B3-like structures instead, and all of those tested, Ca-Sn, Ba-Sn, Sr-Pb, and Ba-Pb, also yield the isostructural A(5)Tt(3)F. The structures and compositions of Ca5Sn3Hx, Ca(5)Sn(3)Fo(0.89), Eu5Sn3Hx, and Sr5Pb3F have been refined from single-crystal X-ray diffraction data and of Ca5Sn3D from powder neutron data. The interstitial H, F atoms are bound in a tetrahedral (A(2+))(4) cavity in a Cr5B3-type metal atom structure. Nine previous reports of binary "Ba5Sn3", "Yb5Sn3", "Sr5Pb3", and "Ba5Pb3" compounds were wrong and presumably concerned the hydrides. The new ternary phases are generally Pauli-paramagnetic, evidently with pi* electrons from the characteristic tetrelide dimers in this structure type at least partially delocalized into the conduction band. The Sn-Sn bonds appear correspondingly shortened on oxidation. Other new phases reported are CaSn (CrB type), YbsSn(4)H(x) (Sm5Ge4), YbSn (similar to TlTe), Ba5Pb3 (similar toW(5)Si(3)), and Yb31Pb20 (Ca31Sn20).