By　variation　of　the　amount　of　GeO2,　two　organic-inorganic　hybrid　germanoniobate　frameworks　with　6-connected　pcu　and　10-connected　bct　topologies　were　constructed　from　peanut-shaped　{alpha-Ge12Nb38}　and　{beta-Ge12Nb38}　clusters,　respectively.　The　{alpha-Ge12Nb38}　and　{beta-Ge12Nb38}　clusters　contain　the　most　Ge　centers　of　germanoniobates　reported　so　far.　The　compounds　exhibit　proton　conduction　properties　with　a　conductivity　of　3.04　x　10(-4)　Scm(-3)　for　1　and　1.62　x　10(-4)　Scm(-3)　for　2　at　85　degrees　C　and　98%　RH.　The　water　vapor　adsorption　capacities　for　1　and　2　are　5.86　and　4.40　mmolg(-1),　respectively.