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Iron(II) carbonate, or ferrous carbonate, is a chemical compound with formula FeCO 3 , that occurs naturally as the mineral siderite . At ordinary ambient temperatures, it is a green-brown ionic solid consisting of iron(II) cations Fe 2+
Siderite is a mineral composed of iron(II) carbonate (FeCO 3).Its name comes from the Ancient Greek word σίδηρος (sídēros), meaning "iron".A valuable iron ore, it consists of 48% iron and lacks sulfur and phosphorus.
Table of specific heat capacities at 25 °C (298 K) unless otherwise noted. [citation needed] Notable minima and maxima are shown in maroon. Substance Phase Isobaric mass heat capacity c P J⋅g −1 ⋅K −1 Molar heat capacity, C P,m and C V,m J⋅mol −1 ⋅K −1 Isobaric volumetric heat capacity C P,v J⋅cm −3 ⋅K −1 Isochoric ...
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For elements that have multiple allotropes, the reference state usually is chosen to be the form in which the element is most stable under 1 bar of pressure. One exception is phosphorus , for which the most stable form at 1 bar is black phosphorus , but white phosphorus is chosen as the standard reference state for zero enthalpy of formation.
Rhodochrosite forms a complete solid solution series with iron carbonate . Calcium (as well as magnesium and zinc, to a limited extent) frequently substitutes for manganese in the structure, leading to lighter shades of red and pink, depending on the degree of substitution. This is the reason for the rose color of rhodochrosite.
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