Arsenidostanates are chemical compounds that contain anions with arsenic bonded to tin. They are in the category of tetrelarsenides, pnictidostannates, or tetrelpnictides.
They are distinct from arsenide stannides such as palarstanide, () where the cation charge exceeds that on the tin or arsenic. Other minerals that contain arsenic and tin are erniggliite and coiraite.
List nameformulaformula weightcrystal systemspace groupunit cellvolumedensitycommentsrefLi1–xSn2+xAs2, 0.2 < x < 0.4trigonalRma=3.991-4.0244 c=25.592-25.632 Z=3353.6-358.9Na2SnAs2I41/acda=14.166, c=21.191, Z = 32metallic greyNaSn2As2rhombohedralRma=4.000 c=27.562metallic; layersKSn3As3orthorhombicPnmaZ=4band gap 0.50 eVRbSn3As3orthorhombicPnmaa=10.321, b=4.0917, c=19.570Ca5Sn2As6orthorhombicPbama = 13.643, b = 11.830, c = 4.121 Z=2α-Sr3Sn2As4orthorhombicCmcaa = 25.798, b = 12.888, c = 19.124, Z = 246358.8melt 1185K; band gap 0.9 eVβ-Sr3Sn2As4monoclinicP21/ca = 7.705, b = 19.118, c = 7.688, β = 112.003°, Z = 41049.9dec>800K; band gap 0.9 eVSr14Sn3As12trigonalR3Z=3Ba3Sn4As6monoclinicP21/na=8.637, b=18.354, c=9.721, β=90.05°, Z=4BaCu6Sn2As4−xtetragonalI4/mmma = 4.164, c = 24.088Ba13Si6Sn8As224551.72tetragonalI2ma = 14.4857, c = 13.5506 Z=22843.45.316black; Si4As10 units; band gap 1.0 eVEuSn2As2trigonalEu14Sn3As12trigonalR3Z=3Eu11Zn4Sn2As123069.46monoclinicC2/ca = 7.5679, b = 13.0883, c = 31.305, β = 94.8444 Z=43089.76.599silver; band gap 0.04 eV; ferromagnetic below 15K; negative colossal magnetoresistance
References