Wolframite
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Wolframite is an iron, manganese, and tungstate mineral with a chemical formula of WO4 that is the intermediate mineral between ferberite and hübnerite. Along with scheelite, the wolframite series are
Wolframiteportugal 3
Diagram of wolframite crystal's front view
Tungstic acid (WO3) in powder form
Ferberite
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Ferberite is the iron endmember of the manganese–iron wolframite solid solution series. The manganese endmember is hübnerite. Ferberite is a black monoclinic mineral composed of iron tungstate, FeWO4.
Wolframite
…Wolframite is an iron, manganese, and tungstate mineral with a chemical formula of (Fe,Mn)WO4 that is the intermediate mineral between ferberite (Fe2+ rich) and hübnerite (Mn2+ rich). Along with scheelite, the wolframite series are the most important tungsten ore minerals. Wolframite is found…
Ferberite with muscovite from Minas da Panasqueira, Beira Baixa, Portugal
Twinned Ferberite, Tazna Mine, Atocha-Quechisla District, Nor Chichas Province, Potosí Department, Bolivia. 4.8 × 4.0 × 3.6 cm.
Ferberite – Cínovec / Zinnwald, Erzgebirge; Krusné Hory Mts, Saxony and Ústí Region (Bohemia), Germany and Czech Republic