Modeling of The Phase Complex Of A Stable Pentatope LiF-K2CrO4-Rb2CrO4-KF-RbF of the four-component mutual system Li+, K+, Rb+||F–, CrO
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| 1. | Title | Title of document | Modeling of The Phase Complex Of A Stable Pentatope LiF-K2CrO4-Rb2CrO4-KF-RbF of the four-component mutual system Li+, K+, Rb+||F–, CrO |
| 2. | Creator | Author's name, affiliation, country | A. V. Burchakov; Samara State Technical University; Russian Federation |
| 2. | Creator | Author's name, affiliation, country | E. O. Burchakova; Samara State Technical University; Russian Federation |
| 3. | Subject | Discipline(s) | |
| 3. | Subject | Keyword(s) | physico-chemical analysis; differential thermal analysis; 3D model; continuous series of solid solutions; four-component eutectic |
| 4. | Description | Abstract | The quasi-four-component system LiF–K2CrO4–Rb2CrO4–KF–RbF, which is a stable pentatope of the four-component mutual system Li+,K+,Rb+||F–,CrO, is selected for study. The prediction of non-invariant and monovariant equilibria in the system was carried out using the crystallization scheme: the eutectic equilibrium L ⇄ LiF + KxRb1–xF + α-K2xRb2–2xCrO4 + α-K3xRb3–3xFCrO4, is carried out in the system, which is confirmed by differential thermal analysis. The crystallization scheme makes it possible to predict non- and monovariant equilibria based on the analysis of faceting systems. The composition and melting point of the mixture corresponding to the four-component eutectic E□ 438 were revealed. Based on the data obtained, a 3D computer model of the phase complex of the system in the form of a concentration pentatope is constructed. The computer model clearly demonstrates the phase transformations in the system. The structure of the spatial phase diagram is revealed. In the system, the crystallizing phases are lithium fluoride, three phases of continuous series of solid solutions: based on potassium and rubidium fluorides – KxRb1–xF, based on potassium and rubidium chromates in α-polymorphic modification – α-K2xRb2–2xCrO4, based on potassium and rubidium fluoride chromates in α-polymorphic modification – α-K3xRb3–3xFCrO4. |
| 5. | Publisher | Organizing agency, location | The Russian Academy of Sciences |
| 6. | Contributor | Sponsor(s) |
Ministry of Education and Science of Russia (0778-2020-0005) |
| 7. | Date | (DD-MM-YYYY) | 15.06.2024 |
| 8. | Type | Status & genre | Peer-reviewed Article |
| 8. | Type | Type | Research Article |
| 9. | Format | File format | |
| 10. | Identifier | Uniform Resource Identifier | https://ter-arkhiv.ru/0044-457X/article/view/666498 |
| 10. | Identifier | Digital Object Identifier (DOI) | 10.31857/S0044457X24060096 |
| 10. | Identifier | eLIBRARY Document Number (EDN) | XTEECA |
| 11. | Source | Title; vol., no. (year) | Žurnal neorganičeskoj himii; Vol 69, No 6 (2024) |
| 12. | Language | English=en | ru |
| 13. | Relation | Supp. Files |
Fig. 1. The tree of phases of the system Li+,K+,Rb+||F,CrO42–. D1 – LiRbCrO4, D2 – LiKCrO4. The crystallizing phases are predicted. (177KB) Fig. 2. Stable pentatope LiF–K2CrO4–Rb2CrO4–KF–RbF of the Li+,K+,Rb+||F–,CrO system. (210KB) Fig. 3. Scheme of monovariant equilibria of the stable pentatope LiF–K2CrO4–Rb2CrO4–KF–RbF. (143KB) Fig. 4. Cross section A–B–C–D of the stable pentatope LiF–K2CrO4–Rb2CrO4–KF–RbF of the Li,K,Rb||F,CrO4 system. The fields of primary phase crystallization are indicated by numbers: 1 – (LiF + KxRb1–xF); 2 – (LiF + α-K3xRb3–3xCrO4). (197KB) Fig. 5. T–x-section diagram A–C of the A–B–C–D section in the pentatope LiF–K2CrO4–Rb2CrO4–KF–RbF. The numbers indicate the phase regions: 1 – LiF + KxRb1–xF + α-K2xRb2–2xCrO4 + α-K3xRb3–3xCrO4; 2 – LiF + α-K2xRb2–2xCrO4 + + α-K3xRb3–3xCrO4. (257KB) Fig. 6. T–x is a diagram of the section B–D of the A–B–C–D section in the pentatope LiF–K2CrO4–Rb2CrO4–KF–RbF. (284KB) Fig. 7. T–x is a diagram of the section LiF–M of the A–B–C–D section in the pentatope LiF–K2CrO4–Rb2CrO4–KF–RbF. (177KB) Fig. 8. The model of the stable pentatope LiF–K2CrO4–Rb2CrO4–KF–RbF of the four-component mutual system Li,K,Rb||F,CrO4. (306KB) |
| 14. | Coverage | Geo-spatial location, chronological period, research sample (gender, age, etc.) | |
| 15. | Rights | Copyright and permissions |
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