Abstract
The rhodochrosite (MnCO3) shows complete solid solution with siderite (FeCO3), and it may contain substantial amounts of Zn, Mg, Co, and Ca. There is no precedent in the literature on the treatment of tumor tissues by eliminating these affected tissues, using rhodocrosite crystals in tissue absorption and eliminating cancerous tissues by synchrotron radiation. The studies that are found are the research papers of this team. Through an unrestricted Hartree- Fock (UHF) computational simulation, Compact effective potentials (CEP), the infrared spectrum of the protonated rhodochrosite crystal, CH19Mn6O8, and the load distribution by the unit molecule by two widely used methods, Atomic Polar Tensor (APT) and Mulliken, were studied. The rhodochrosite crystal unit cell of structure CMn6O8, where the load distribution by the molecule was verified in the UHF CEP-4G (Effective core potential (ECP) minimal basis), UHF CEP-31G (ECP split valance) and UHF CEP-121G (ECP triple-split basis). The largest load variation in the APT and Mulliken methods were obtained in the CEP-121G basis set, with δ = 2.922 e δ = 2.650 u. a., respectively, being δAPT > δMulliken. The maximum absorbance peaks in the CEP-4G, CEP-31G and CEP-121G basis set are present at the frequencies 2172.23 cm-1, with a normalized intensity of 0.65; 2231.4 cm-1 and 0.454; and 2177.24 cm-1 and 1.0, respectively. An in-depth study is necessary to verify the absorption by the tumoral and non-tumoral tissues of rhodochrosite, before and after irradiating of synchrotron radiation using Small–Angle X–Ray Scattering (SAXS), Ultra–Small Angle X–Ray Scattering (USAXS), Fluctuation X–Ray Scattering (FXS), Wide–Angle X–Ray Scattering (WAXS), Grazing–Incidence Small–Angle X–Ray Scattering (GISAXS), Grazing–Incidence Wide–Angle X–Ray Scattering (GIWAXS), Small–Angle Neutron Scattering (SANS), Grazing–Incidence Small–Angle Neutron Scattering (GISANS), X–Ray Diffraction (XRD), Powder X–Ray Diffraction (PXRD), Wide–Angle X–Ray Diffraction (WAXD), Grazing– Incidence X–Ray Diffraction (GIXD) and Energy–Dispersive X–Ray Diffraction (EDXRD). Later studies could check the advantages and disadvantages of rhodochrosite in the treatment of cancer through synchrotron radiation, such as one oscillator crystal. Studying the sites of rhodocrosite action may lead to a better understanding of its absorption by healthy and/or tumor tissues, thus leading to a better application of synchrotron radiation to the tumors to eliminate them.
Keywords: Rhodochrosite; Quartz Crystal; Hartree-Fock Methods; APT; Mulliken; Effective Core Potential; Synchrotron Radiation; Cancer; Tumoral Tissues
Abbreviations: UHF: Unrestricted Hartree- Fock ;APT: Atomic Polar Tensor ; CEP: Compact effective potentials; SAXS: Small–Angle X–Ray Scattering; USAXS: Ultra–Small Angle X-Ray Scattering; FXS: Fluctuation X–Ray Scattering; WAXS: Wide-Angle X-Ray Scattering; GISAXS: Grazing–Incidence Small-Angle X–Ray Scattering; GIWAXS: Grazing-Incidence Wide-Angle X–Ray Scattering; SANS: Small– Angle Neutron Scattering; GISANS: Grazing– Incidence Small–Angle Neutron Scattering; XRD: X–Ray Diffraction; PXRD: Powder X–Ray Diffraction; WAXD: Wide-Angle X-Ray Diffraction; GIXD: Grazing– Incidence X–Ray Diffraction; EDXRD: Energy–Dispersive X–Ray Diffraction
Introduction
The rhodochrosite (MnC03) shows complete solid solution with siderite (FeC03), and it may contain substantial amounts of Zn, Mg, Co, and Ca. The electric charge that accumulates in certain solid materials, such as crystals, certain ceramics, and biological matter such as bone, DNA and various proteins in response to applied mechanical stress, phenomenon called piezoelectricity [1-12]. Through an unrestricted Hartree-Fock (UHF) computational simulation, Compact effective potentials (CEP), the infrared spectrum of the protonated rhodochrosite crystal, CH19Mn6O8, and the load distribution by the unit molecule by two widely used methods, Atomic Polar Tensor (APT) and Mulliken, were studied. The rhodochrosite crystal unit cell of structure CMn6O8, where the load distribution by the molecule was verified in the UHF CEP-4G (Effective core potential (ECP) minimal basis), UHF CEP-31G (ECP split valance) and UHF CEP-121G (ECP triple-split basis). The Figures 1 & 2 is one photography the Rhodochrosite stone, some cut and used with semi-precious jewelry. The lovely rose-pink rock, Rhodochrosite, like its namesake the rose, is soft and fragile, measuring only 3.5 to 4 on the hardness, or Mohs scale. It is found in two forms: the first is a clear, bright pink, rhombohedra, gem quality crystal, which is rare and demands great skill from the cutter. The more common form, which comes from white banded stalactite rocks, is a little harder and is used for semi-precious jewelry [14].
Methods
Hartree-Fock Methods
The molecular Hartree-Fock [15-21] wave function is written as an antisymmetrized product (Slater determinant) of spin-orbitals, each spin-orbital being a product of a spatial orbital i φ and a spin function (either α or β ) [22-31].
The expression for the Hartree-Fock molecular electronic energy EHF is given by the variation theorem as where D is the Slater-determinant Hartree-Fock wave function and and VNN are given by
Since NN V does not involve electronic coordinates and D is normalized, we have The operator is the sum of one-electron operators and two-electron operators we have where and The Hamiltonian is the same as the Hamiltonian for an atom except that replaces in . Hence
where
and
can be used to give
Therefore, the Hartree-Fock energy of a diatomic or polyatomic molecule with only closed shells is
where the one-electron-operator symbol was changed from to [5]
Result
The Figure 3 show on cell structure of a protonated rhodochrosite crystal of structureStoichiometric is CH19Mn6O8 , obtained after molecular dynamics via unrestricted Hartree-Fock method, in basis set CEP-4G, CEP-31G and CEP-121G [32-97].The rhodochrosite crystal unit cell of structure CMn6O8, where the load distribution by the molecule was verified in the unrestricted Hartree-Fock method, UHF CEP-4G (Effective core potential (ECP) minimal basis), UHF CEP-31G (ECP split valance) and UHF CEP-121G (ECP triple-split basis), through the analysis of APT and Mulliken loads [98-100].The rhodochrosite unit cell was protonated, then presented the structure CH19Mn6O8 for the study with ab initio methods with +4 multiplicity. The displacement of charges by the molecule was analyzed to verify the site of molecular action. The load distribution by the protonated crystal is evaluated in Table 1, and its vibrational frequencies in Table 2. The largest load variation in the APT and Mulliken methods were obtained in the CEP-121G base set, with δ = 2.922 e δ = 2.650, respectively, being δAPT > δMulliken , in all sets of calculated bases, Table 1. The Table 2 show the maximum absorbance peaks in the CEP-4G, CEP-31G and CEP- 121G set basis are present at the frequencies 2172.23 cm-1, with a normalized intensity of 65%; 2231.4 cm-1 and 45.4%; and 2177.24 cm-1 and 100%, respectively.
Note: *±1,602 176 634 × 10−19 C (Coulomb)
Note: ν = Frequency (cm-1); I = Normalized Intensity (%).
Analysis
The Mulliken load method in the UHF-CEP-4G base set; UHFCEP- 31G and UHF-CEP-121G are sufficient to show that the sites of action of the rhodochrosite crystal structure are found in three Oxygen-linked Manganese atoms, which are attached to the central Carbon atom, as well as these. Oxygen atoms and the central Carbon. The charge displacement is strong in the oxygen atoms, especially those near the central carbon, with negative load in all set basis studied, both in the APT and Mulliken charges. The central carbon atom on all set basis is positively charged in both APT and Mulliken load, except Milliken in CEP-31G, which is neutral. As might be expected from the charges by APT, the strong positive load manganese atoms, the strong negative load oxygen, the positively charged carbon atom. The manganese atom farthest from the carbon atom has a slight positive to neutral load shift. The Mulliken load method presents a better result when compared to the APT, in the studied set basis, for protonated rhodochrosite crystal, with a smaller load variation δ = 2,650 u.a for CEP-121G.
The absorption peaks are in a Gaussian between the frequencies 1620 cm-1 and 2520 cm-1, Figure 3.The largest load variation in the APT and Mulliken methods were obtained in the CEP-121G base set, with δ = 2.922 e δ = 2.650, respectively, being δAPT > δMulliken , in all sets of calculated basis, Table 1. The Figure 1 is one photography the Rhodochrosite stone from China. The Figure 2 is one photography the Rhodochrosite stone, some cut and used with semi-precious jewelry. The Figure 3 represented a Cell structure of a protonated rhodochrosite crystal. Represented in red the oxygen; silver in color Manganese; in gray color Hydrogen; in light see green color the Carbon. Stoichiometry not protonated: CMn6O8. Stoichiometry protonated: CH19Mn6O8.The Figure 3 show the protonated rhodochrosite crystal for UHF-CEP-4G basis set, UHF-CEP-31G and UHF-CEP-121G, respectively, which are shown in Table 2. The rhodochrosite crystal unit cell of structure CMn6O8, where the load distribution by the molecule was verified in the unrestricted Hartree-Fock method, UHF CEP-4G (Effective core potential (ECP) minimal basis), UHF CEP-31G (ECP split valance) and UHF CEP-121G (ECP triple-split basis), through the analysis of APT and Mulliken loads.
Conclusion
The absorption peaks are in a Gaussian between the frequencies 1620 cm-1 and 2520 cm-1.The Mulliken load method presents a better result when compared to the APT, in the studied set basis, for protonated rhodochrosite crystal, with a smaller load variation δ = 2,650 u.a for CEP-121G.The maximum absorbance peaks in the CEP-4G, CEP-31G and CEP-121G basis set are present at the frequencies 2172.23 cm-1, with a normalized intensity of 0.65; 2231.4 cm-1 and 0.454; and 2177.24 cm-1 and 1.0, respectively. Later studies could check the advantages and disadvantages of rhodochrosite in the treatment of cancer through synchrotron radiation, such as one oscillator crystal. An in-depth study is necessary to verify the absorption by the tumoral and non-tumoral tissues of rhodochrosite, before and after irradiating of synchrotron radiation using Small-Angle X-Ray Scattering (SAXS), Ultra-Small Angle X-Ray Scattering (USAXS), Fluctuation X-Ray Scattering (FXS), Wide-Angle X-Ray Scattering (WAXS), Grazing-Incidence Small-Angle X-Ray Scattering (GISAXS), Grazing-Incidence Wide-Angle X-Ray Scattering (GIWAXS), Small- Angle Neutron Scattering (SANS), Grazing-Incidence Small-Angle Neutron Scattering (GISANS), X-Ray Diffraction (XRD), Powder X-Ray Diffraction (PXRD), Wide-Angle X-Ray Diffraction (WAXD), Grazing-Incidence X-Ray Diffraction (GIXD) and Energy-Dispersive X-Ray Diffraction (EDXRD).
Disclosures/Conflict of Interest
The authors declare that there is no conflict of interest.
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