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Minerals
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Crystallography of Calcium Phosphates Minerals
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Crystallography of Calcium Phosphates Minerals

A special issue of Minerals (ISSN 2075-163X). This special issue belongs to the section "Crystallography and Physical Chemistry of Minerals & Nanominerals".

Deadline for manuscript submissions: closed (27 November 2022) | Viewed by 5467

Special Issue Editors

Dr. Margarita A. Goldberg

E-Mail Website
Guest Editor
Laboratory of Composite Ceramic Materials, A. A. Baikov Institute of Metallurgy and Materials Science (IMET), Russian Academy of Sciences, 119334 Moscow, Russia
Interests: synthesis; nanoparticles; bioceramic; calcium phosphates; magnesium phosphates; additive manufacturing; zirconia; alumina
Special Issues, Collections and Topics in MDPI journals
Dr. Olga Yakubovich

E-Mail Website
Guest Editor
Department of Crystallography, Geological Faculty, Moscow M.V. Lomonosov State University, 119992 Moscow, Russia
Interests: X-ray diffraction; crystal structures of minerals and inorganic solids; crystal chemistry of inorganic compounds

Special Issue Information

Dear Colleagues,

Calcium phosphates and their substituted forms are widely used in human life, including but not limited to in biomedical applications, adsorptions, water purification, catalysts, and nutrition additives. This Special Issue is dedicated to recent advances in the crystallography and physical chemistry properties of calcium phosphate minerals and their synthetic analogs in the form of nanoparticles, powders, ceramics, and cement materials. Cations and anion substitutions in the calcium phosphate’s structure, as well as composite materials and minerals, open broad opportunities to design and create materials with outstanding properties.

Investigations into composition–structure–property relationships using modern characterization techniques and theoretical models, computer simulations, and first-principles calculations are the focus of the Special Issue, aiming to give rise to the elucidation of materials with improved characteristics. The data of experimental investigations and theoretical and calculation results for calcium-phosphate-based materials in the form of original articles, communications, and reviews are warmly welcome. 

Dr. Margarita A. Goldberg
Dr. Olga Yakubovich
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Minerals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • calcium phosphate
  • hydroxyapatite
  • whitlockite
  • minerals
  • synthetic mineral analogues
  • crystal structure
  • inorganic synthesis
  • structure–property relationships
  • powder X-ray diffraction
  • phase transformations
  • crystallization
  • sintering

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Published Papers (2 papers)

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Research

18 pages, 4157 KiB  
Article
Effects of Heat Treatment on Phase Formation in Cytocompatible Sulphate-Containing Tricalcium Phosphate Materials
by Dinara R. Khayrutdinova, Margarita A. Goldberg, Olga S. Antonova, Polina A. Krokhicheva, Alexander S. Fomin, Tatiana O. Obolkina, Anatoliy A. Konovalov, Suraya A. Akhmedova, Irina K. Sviridova, Valentina A. Kirsanova, Natalia S. Sergeeva, Sergey M. Barinov and Vladimir S. Komlev
Minerals 2023, 13(2), 147; https://doi.org/10.3390/min13020147 - 19 Jan 2023
Cited by 3 | Viewed by 2599
Abstract
Powders based on β-tricalcium phosphate (β-TCP) containing sulphate groups at up to 12.0 mol.% were synthesised by chemical precipitation from aqueous solutions. The obtained materials were characterised by X-ray phase analysis, Fourier transform infrared spectroscopy, measurement of specific surface area, scanning electron microscopy, [...] Read more.
Powders based on β-tricalcium phosphate (β-TCP) containing sulphate groups at up to 12.0 mol.% were synthesised by chemical precipitation from aqueous solutions. The obtained materials were characterised by X-ray phase analysis, Fourier transform infrared spectroscopy, measurement of specific surface area, scanning electron microscopy, energy dispersive analysis, synchronous thermal analysis, mass spectra investigations and biological assays. It was established that during the synthesis, the obtained materials lose the sulphate groups in the course of heat treatment at 900 or 1200 °C. These groups stabilise low-temperature β-TCP, but when introduced at a high concentration, the sulphate groups contribute to the formation of hydroxyapatite during the heat treatment. Specific surface area of the powders proved to be in the range 81.7–96.5 m2/g. Results of biological assays showed cytocompatibility of both pure β-TCP and samples of sulphate-containing β-TCP. Additionally, matrix properties in the culture of MG-63 cells were revealed in all samples. Thus, the obtained materials are promising for biomedical applications. Full article
(This article belongs to the Special Issue Crystallography of Calcium Phosphates Minerals)
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19 pages, 3644 KiB  
Article
Carbonate-Bearing, F-Overcompensated Fluorapatite in Magnesian Exoskarns from Valea Rea, Budureasa, Romania
by Ştefan Marincea, Delia-Georgeta Dumitraş, Cristina Sava Ghineţ and Fabrice Dal Bo
Minerals 2022, 12(9), 1083; https://doi.org/10.3390/min12091083 - 27 Aug 2022
Cited by 3 | Viewed by 1835
Abstract
A carbonate-bearing, fluorine-overcompensated fluorapatite (F = 4.42 wt.% as compared with 3.77 wt.% F in the Ca5(PO4)3F end-member), was identified in forsterite-bearing skarns from Valea Rea (N 46°39′48″, E 22°36′43″), located near the contact of the granodiorite [...] Read more.
A carbonate-bearing, fluorine-overcompensated fluorapatite (F = 4.42 wt.% as compared with 3.77 wt.% F in the Ca5(PO4)3F end-member), was identified in forsterite-bearing skarns from Valea Rea (N 46°39′48″, E 22°36′43″), located near the contact of the granodiorite laccolith from Budureasa, of Upper Cretaceous Age, with Anisian dolostones. The chemical structural formula (with carbonate not included) is: (Ca4.989Mn0.001Fe2+0.003Mg0.003Ce0.001La0.001)(P2.992Si0.008)(O11.894F1.202Cl0.001). No major structural distortions due to (CO3F)3--for-(PO4)3- replacement were identified by single crystal X-ray diffraction, Raman or FTIR. The mineral crystallizes in space group P63/m, having as cell parameters a = 9.3818(1) Å and c = 6.8872(1) Å. The indices of refraction are: ω = 1.634(2) and ε = 1.631(1). The calculated density is Dx = 3.199 g/cm3 and the measured density is Dm = 3.201(3) g/cm3. Calculation of the Gladstone–Dale compatibility indices gave in all cases values indicative of superior agreement between physical and chemical data. In the infrared spectra, the multiplicity of the bands assumed to phosphate modes (1ν1 + 2ν2 + 3ν3 + 3ν4) agrees with the reduction of the symmetry of PO43− ion from Td to C6. Chemical peculiarities and textural relations agree with a hydrothermal origin of the mineral, crystallized from F-rich fluids originating from the granodiorite intrusion. Full article
(This article belongs to the Special Issue Crystallography of Calcium Phosphates Minerals)
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