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Zinc carbonate is the inorganic compound with the formula ZnCO 3. It is a white solid that is insoluble in water. It exists in nature as the mineral smithsonite. It is prepared by treating cold solutions of zinc sulfate with potassium bicarbonate. Upon warming, it converts to basic zinc carbonate (Zn 5 (CO 3) 2 (OH) 6). [6]
Zinc is a strong reducing agent with a standard redox potential of −0.76 V. Pure zinc tarnishes rapidly in air, rapidly forming a passive layer. The composition of this layer can be complex, but one constituent is probably basic zinc carbonate, Zn 5 (OH) 6 CO 3. [8] The reaction of zinc with water is slowed by this passive layer.
Zinc is a chemical element with the symbol Zn and atomic number 30. ... and zinc carbonate are nearly insoluble and poorly absorbed in the body. [231] ...
Smithsonite, also known as zinc spar, is the mineral form of zinc carbonate (Zn CO 3). Historically, smithsonite was identified with hemimorphite before it was realized that they were two different minerals. The two minerals are very similar in appearance and the term calamine has been used for both, leading to some confusion.
Zinc carbonate ZnC O 3 or smithsonite and Zinc silicate Zn 4 Si 2 O 7 (O H ) 2 ·H 2 O or hemimorphite . Although chemically and crystallographically quite distinct, the two minerals exhibit similar massive or botryoidal external form [ 1 ] [ 2 ] and are not readily distinguished without detailed chemical or physical analysis.
Aurichalcite is a carbonate mineral, usually found as a secondary mineral in copper and zinc deposits. Its chemical formula is (Zn,Cu) 5 (CO 3 ) 2 (OH) 6 . The zinc to copper ratio is about 5:4. [ 3 ]
The exact cause of Alzheimer’s disease has long evaded scientists, but experts typically suggest there are likely several factors (like genetics, environment, and lifestyle) that contribute to ...
A carbonate is a salt of carbonic acid, (H 2 CO 3), [2] characterized by the presence of the carbonate ion, a polyatomic ion with the formula CO 2− 3. The word "carbonate" may also refer to a carbonate ester , an organic compound containing the carbonate group O=C(−O−) 2 .