Carbonate minerals have been playing an important role in determining the history of the earth's atmosphere, geology, and hydrology and have received extensive attention. In this study, infrared spectral characteristics and infrared radiation properties of four carbonate minerals (calcite, rhodochrosite, siderite, magnesite) were highlighted and investigated by using X-ray diffraction (XRD), X-ray fluorescence spectroscopy (XRF), energy dispersive X-ray spectrometer (EDS), differential scanning calorimeter (DSC) and infrared spectroscopy (IR) (absorption and emission spectroscopy). Infrared absorption and thermal emission spectra systematically illustrated the effect of cations (Ca²⁺, Mg²⁺, Fe²⁺, Mn²⁺) on shifting the positions and infrared performance of the carbonate absorption bands. Three specific modes of the carbonate anion (CO₃²⁻) in mid-infrared range, derived from the out-of-plane bending, asymmetric stretching, and in-plane bending vibration (ν₂, ν₃, and ν₄ modes, respectively) were found to be blue-shifted with the decrease of cationic radius, bond length and lattice volume. The average emissivity of calcite, rhodochrosite, siderite, and magnesite were calculated as 0.954, 0.934, 0.907, and 0.883, respectively, in the temperature range of 50–155 °C and the mid-infrared range of 400–2000 cm⁻¹. Emissivity and thermal radiation performance of carbonate minerals can be influenced by several interplaying factors. In particular, higher emissivity was proportional to longer bond length (cation-oxygen and carbon–oxygen with linear correlation coefficients (R²) of 0.751 and 0.721, respectively) and larger cationic radius (R² = 0.872), which gave rise to lower vibrational frequency, narrower vibration range, and reduced absorbed energy. Furthermore, the heat capacity of four minerals presented a positive correlation with their infrared radiant energy within the temperature. It thus can be concluded that complex and multifactor interactions occur within the crystal structure affecting the fundamental vibrational frequencies of CO₃²⁻ group, and infrared performance was consequently influenced. This paper can provide theoretical reference for demonstrating the effect of crystal structure on infrared radiation performance and spectral characteristics of various minerals, which is conducive to distinguish minerals based on their features in infrared spectroscopy.

碳酸盐矿物在确定地球大气，地质和水文学的历史中一直发挥着重要作用，并受到了广泛的关注。在这项研究中，重点突出了四种碳酸盐矿物（方解石，菱锰矿，菱铁矿，菱镁矿）的红外光谱特性和红外辐射特性，并通过X射线衍射（XRD），X射线荧光光谱（XRF），能量色散X进行了研究。射线光谱仪（EDS），差示扫描量热仪（DSC）和红外光谱仪（IR）（吸收和发射光谱仪）。红外吸收和热发射光谱系统地说明了阳离子（Ca 2 ⁺，Mg 2 ⁺，Fe 2 ⁺，Mn ²⁺）改变碳酸盐吸收带的位置和红外性能。碳酸根阴离子（CO的三个特定模式₃ ^2-中的范围的中红外）中，从平面外的弯曲衍生，不对称拉伸，以及在平面内弯曲振动（ν ₂，ν ₃，和ν _4种模式，分别发现随着阳离子半径，键长和晶格体积的减小，蓝移。在50-155°C的温度范围和400-2000 cm ^-1的中红外范围内，方解石，菱锰矿，菱铁矿和菱镁矿的平均发射率分别为0.954、0.934、0.907和0.883。。碳酸盐矿物的发射率和热辐射性能可能会受到多种相互作用因素的影响。特别是，较高的发射率与较长的键长成正比（阳离子-氧和碳-氧的线性相关系数（R ²）分别为0.751和0.721）和较大的阳离子半径（R ²  = 0.872），从而导致较低的发射率。振动频率，更窄的振动范围并减少了吸收的能量。此外，四种矿物的热容量与其温度范围内的红外辐射能呈正相关。因此可以得出结论，在晶体结构内会发生复杂和多因素的相互作用，从而影响CO ₃的基本振动频率。^2-组，因此红外性能受到影响。本文可为证明晶体结构对各种矿物的红外辐射性能和光谱特性的影响提供理论参考，有利于根据矿物的红外光谱特征对其进行区分。