Different concentrations of tellurate and tellurite amendments were used. |
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The two forms of telluric acid form tellurate salts containing the TeO and TeO anions, respectively. |
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Natural tellurite and tellurate minerals also occur, formed by oxidation of tellurides near the Earth's surface. |
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There are a few dozen tellurate minerals and telluride minerals, and tellurium occurs in some minerals with gold, such as sylvanite and calaverite. |
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