Molybdatetype

Molybdatetype refers to a classification of minerals that contain the molybdate anion, [MoO4]2-. This anion is characterized by a central molybdenum atom bonded to four oxygen atoms in a tetrahedral arrangement. Molybdatetype minerals are typically found in oxidized zones of hydrothermal ore deposits, where molybdenum-bearing sulfides have been weathered. They are often associated with other oxide and hydroxide minerals.

Common examples of molybdatetype minerals include wulfenite (PbMoO4) and powellite (CaMoO4). Wulfenite is a lead molybdate, often found as tabular or pyramidal crystals with a characteristic orange to reddish-brown color. Powellite, a calcium molybdate, is typically white to yellow and can be found in similar geological environments. Other less common molybdatetype minerals exist, often with more complex compositions involving additional cations.

The physical properties of molybdatetype minerals can vary widely depending on their specific chemical composition and crystal structure. However, many are relatively soft, have moderate to high specific gravities, and exhibit distinct cleavage or fracture patterns. Their solubility in acidic solutions is also a notable characteristic, which is important for their geological occurrence and potential for secondary enrichment. Molybdatetype minerals are of interest in mineralogy, geology, and sometimes as minor sources of molybdenum.