{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,15]],"date-time":"2026-05-15T13:38:40Z","timestamp":1778852320943,"version":"3.51.4"},"reference-count":44,"publisher":"MDPI AG","issue":"24","license":[{"start":{"date-parts":[[2022,12,8]],"date-time":"2022-12-08T00:00:00Z","timestamp":1670457600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Russian Academy of Sciences scientific topic","award":["#FMEZ-2022-0018"],"award-info":[{"award-number":["#FMEZ-2022-0018"]}]},{"name":"Russian Academy of Sciences scientific topic","award":["#21-77-10111"],"award-info":[{"award-number":["#21-77-10111"]}]},{"name":"Russian Science Foundation","award":["#FMEZ-2022-0018"],"award-info":[{"award-number":["#FMEZ-2022-0018"]}]},{"name":"Russian Science Foundation","award":["#21-77-10111"],"award-info":[{"award-number":["#21-77-10111"]}]},{"name":"Russian Science Foundation","award":["#FMEZ-2022-0018"],"award-info":[{"award-number":["#FMEZ-2022-0018"]}]},{"name":"Russian Science Foundation","award":["#21-77-10111"],"award-info":[{"award-number":["#21-77-10111"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>The influence of structural features of three serpentine-group minerals (antigorite, chrysotile, and lizardite) on the hydration of heat-treated materials and the formation of magnesium silicate binder has been studied. Initial serpentine samples have been fired in the interval 550\u2013800 \u00b0C with a step of 50 \u00b0C; acid neutralization capacity (ANC) values have been determined for all samples. Antigorite samples (SAP) have exhibited a maximum reactivity at a temperature of 700 \u00b0C (ANC 7.7 meq\/g). We have established that the acid-neutralizing capacity of chrysotile and lizardite samples in the temperature range of 650\u2013700 \u00b0C differ slightly; the capacity varied in the interval of 19.6\u201319.7 meq\/g and 19.6\u201319.7 meq\/g, respectively. The samples obtained at optimal temperatures (antigorite\u2014700 \u00b0C, lizardite, and chrysotile\u2014650 \u00b0C) have been studied. Heat-treated serpentines have interacted with water vapor for a year; serpentine hydration has been investigated. The strength characteristics of the resulting binder agents were studied after 7, 28, 180, and 360 days. Upon hardening within 7 days, the strengths of the SAP and SCH samples have been almost the same (2.2 MPa), whereas this indicator for the SLH and SLK samples has been significantly lower (0.5 MPa). After hardening for over a year, the chrysotile sample SCH had the highest strength (about 8 MPa), whereas the strength of antigorite SAP was 3 MPa. The samples of initial, heat-treated, and hydrated heat-treated serpentines have been studied using XRD, differential scanning calorimetry, and surface texture analysis. The serpentine structure is crucial in destroying the mineral crystal lattice during heat treatment. In contrast to heat-treated chrysotile and lizardite, antigorite did not adsorb water. Structural features of chrysotile provided the highest compressive strength of the binding agent compared with antigorite and lizardite. The acid-neutralizing ability of lizardite was noticeably higher than antigorite, whereas its compressive strength was lower due to the layered mineral structure and impurities. We have established that the minerals\u2019 structural features are crucial for the hydration of heat-treated serpentines; the structure determines material utilization in various environmental technologies.<\/jats:p>","DOI":"10.3390\/ma15248785","type":"journal-article","created":{"date-parts":[[2022,12,9]],"date-time":"2022-12-09T03:59:46Z","timestamp":1670558386000},"page":"8785","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Magnesium Silicate Binding Materials Formed from Heat-Treated Serpentine-Group Minerals and Aqueous Solutions: Structural Features, Acid-Neutralizing Capacity, and Strength Properties"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8103-2279","authenticated-orcid":false,"given":"Tatiana K.","family":"Ivanova","sequence":"first","affiliation":[{"name":"I.V. Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Science Centre, Russian Academy of Sciences, 184209 Apatity, Russia"},{"name":"Laboratory of Nature-inspired Technologies and Environmental Safety of the Arctic, Kola Science Centre, Russian Academy of Sciences, 184209 Apatity, Russia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Irina P.","family":"Kremenetskaya","sequence":"additional","affiliation":[{"name":"I.V. Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Science Centre, Russian Academy of Sciences, 184209 Apatity, Russia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Valentina V.","family":"Marchevskaya","sequence":"additional","affiliation":[{"name":"Mining Institute, Kola Science Centre, Russian Academy of Sciences, 184209 Apatity, Russia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5406-5569","authenticated-orcid":false,"given":"Marina V.","family":"Slukovskaya","sequence":"additional","affiliation":[{"name":"I.V. Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Science Centre, Russian Academy of Sciences, 184209 Apatity, Russia"},{"name":"Laboratory of Nature-inspired Technologies and Environmental Safety of the Arctic, Kola Science Centre, Russian Academy of Sciences, 184209 Apatity, Russia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1699-7584","authenticated-orcid":false,"given":"Svetlana V.","family":"Drogobuzhskaya","sequence":"additional","affiliation":[{"name":"I.V. Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Science Centre, Russian Academy of Sciences, 184209 Apatity, Russia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2022,12,8]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"8126","DOI":"10.1039\/C5DT00877H","article-title":"Structure and properties of binder gels formed in the system Mg(OH)2\u2013SiO2\u2013H2O for immobilisation of Magnox sludge","volume":"44","author":"Walling","year":"2015","journal-title":"Dalton Trans."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"85","DOI":"10.1016\/j.cemconres.2004.06.022","article-title":"Synthesis and characterisation of magnesium silicate hydrate gels","volume":"35","author":"Brew","year":"2005","journal-title":"Cem. Concr. 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