"The mineral is monoclinic, space group C2/c or Cc, with cell parameters of a = 9.52 A, b = 11.47 A, c = 5.10 A and beta = 91 degrees 18' (Wodgina) and a = 9.47 A, b = 11.42 A, c = 5.09 A and beta = 91 degrees 02' (Bernic lake). Its composition is expressed by the formula A 16 O 32 , where A represents chiefly Ta, Sn and Mn, with lesser amounts of Nb, Fe and Ti. The relationship of wodginite to columbite-tantalite, ixiolite and olovotantalite is discussed."

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