Our nanomineralogical investigation of melt inclusions in corundum xenocrysts from the Mt. Carmel area, Israel has revealed seven IMA-approved new minerals since 2021. We report here four new oxide minerals and one new alloy mineral. Magneliite (Ti23+Ti24+O7; IMA 2021-111) occurs as subhedral crystals, similar to 4 mu m in size, with alabandite, zirconolite, Ti,Al,Zr-oxide, and hibonite in corundum Grain 767-1. Magneliite has an empirical formula (Ti1.663+Al0.13Ti0.154+Mg0.10Ca0.01Sc0.01)(Sigma 2.06) (Ti1.934+Zr0.08)(Sigma 2.01)O-7 and the triclinic P (1) over bar Ti4O7-type structure with the cell parameters: a = 5.60(1) angstrom, b = 7.13(1) angstrom, c = 12.47(1) angstrom, alpha = 95.1(1)degrees, beta = 95.2(1)degrees, gamma = 108.7(1)degrees, V = 466(2) angstrom(3), Z = 4. Ziroite (ZrO2; IMA 2022-013) occurs as irregular crystals, similar to 1-4 mu m in size, with baddeleyite, hibonite, and Ti,Al,Zr-oxide in corundum Grain 479-1a. Ziroite has an empirical formula (Zr0.72Ti0.264+Mg0.02Al0.02Hf0.01)(Sigma 1.03)O-2 and the tetragonal P4(2)/nmc zirconia(HT)-type structure with the cell parameters: a = 3.60(1) angstrom, c = 5.18(1) angstrom, V = 67.1(3) angstrom(3), Z = 2. Sassite (Ti23+Ti4+O5; IMA 2022-014) occurs as subhedral-euhedral crystals, similar to 4-16 mu m in size, with Ti,Al,Zr-oxide, mullite, osbornite, baddeleyite, alabandite, and glass in corundum Grain 1125C1. Sassite has an empirical formula (Ti1.353+Al0.49Ti0.084+Mg0.07)(Sigma 1.99)(Ti0.934+Zr0.06Si0.01)(Sigma 1.00)O-5 and the orthorhombic Cmcm pseudobrookite-type structure with the cell parameters: a = 3.80(1) angstrom, b = 9.85(1) angstrom, c = 9.99(1) angstrom, V = 374(1) angstrom(3), Z = 4. Mizraite-(Ce) (Ce(Al11Mg)O-19; IMA 2022-027) occurs as euhedral crystals, <1-14 mu m in size, with Ce-silicate, Ti-sulfide, Ti,Al,Zr-oxide, ziroite, and thorianite in corundum Grain 198-8. Mizraite-(Ce) has an empirical formula (Ce0.76Ca0.10La0.07Nd0.01)(Sigma 0.94)(Al10.43Mg0.84Ti0.603+Si0.09Zr0.04)(Sigma 12.00)O-19 and the hexagonal P6(3)/mmc magnetoplumbite-type structure with the cell parameters: a = 5.61(1) angstrom, c = 22.29(1) angstrom, V = 608(2) angstrom(3), Z = 2. Yeite (TiSi; IMA 2022-079) occurs as irregular-subhedral crystals, 1.2-3.5 mu m in size, along with wenjiite (Ti5Si3) and zhiqinite (TiSi2) in Ti-Si alloy inclusions in corundum Grain 198c. Yeite has an empirical formula (Ti0.995Mn0.003V0.001Cr0.001)(Si0.996P0.004) and the orthorhombic Pnma FeB-type structure with the cell parameters: a = 6.55(1) angstrom, b = 3.64(1) angstrom, c = 4.99(1) angstrom, V = 119.0(4) angstrom(3), Z = 4. The five minerals are high-temperature oxide or alloy phases, formed in melt pockets in corundum xenocrysts derived from the upper mantle beneath Mt. Carmel.

New Minerals from Inclusions in Corundum Xenocrysts from Mt. Carmel, Israel: Magnéliite, Ziroite, Sassite, Mizraite-(Ce) and Yeite / M. Chi, F. Cámara, L. Bindi, V. Toledo, W.L. Griffin. - In: MATERIALS. - ISSN 1996-1944. - 16:24(2023 Dec 09), pp. 7578.1-7578.22. [10.3390/ma16247578]

New Minerals from Inclusions in Corundum Xenocrysts from Mt. Carmel, Israel: Magnéliite, Ziroite, Sassite, Mizraite-(Ce) and Yeite

F. Cámara
Secondo
Writing – Review & Editing
;
2023

Abstract

Our nanomineralogical investigation of melt inclusions in corundum xenocrysts from the Mt. Carmel area, Israel has revealed seven IMA-approved new minerals since 2021. We report here four new oxide minerals and one new alloy mineral. Magneliite (Ti23+Ti24+O7; IMA 2021-111) occurs as subhedral crystals, similar to 4 mu m in size, with alabandite, zirconolite, Ti,Al,Zr-oxide, and hibonite in corundum Grain 767-1. Magneliite has an empirical formula (Ti1.663+Al0.13Ti0.154+Mg0.10Ca0.01Sc0.01)(Sigma 2.06) (Ti1.934+Zr0.08)(Sigma 2.01)O-7 and the triclinic P (1) over bar Ti4O7-type structure with the cell parameters: a = 5.60(1) angstrom, b = 7.13(1) angstrom, c = 12.47(1) angstrom, alpha = 95.1(1)degrees, beta = 95.2(1)degrees, gamma = 108.7(1)degrees, V = 466(2) angstrom(3), Z = 4. Ziroite (ZrO2; IMA 2022-013) occurs as irregular crystals, similar to 1-4 mu m in size, with baddeleyite, hibonite, and Ti,Al,Zr-oxide in corundum Grain 479-1a. Ziroite has an empirical formula (Zr0.72Ti0.264+Mg0.02Al0.02Hf0.01)(Sigma 1.03)O-2 and the tetragonal P4(2)/nmc zirconia(HT)-type structure with the cell parameters: a = 3.60(1) angstrom, c = 5.18(1) angstrom, V = 67.1(3) angstrom(3), Z = 2. Sassite (Ti23+Ti4+O5; IMA 2022-014) occurs as subhedral-euhedral crystals, similar to 4-16 mu m in size, with Ti,Al,Zr-oxide, mullite, osbornite, baddeleyite, alabandite, and glass in corundum Grain 1125C1. Sassite has an empirical formula (Ti1.353+Al0.49Ti0.084+Mg0.07)(Sigma 1.99)(Ti0.934+Zr0.06Si0.01)(Sigma 1.00)O-5 and the orthorhombic Cmcm pseudobrookite-type structure with the cell parameters: a = 3.80(1) angstrom, b = 9.85(1) angstrom, c = 9.99(1) angstrom, V = 374(1) angstrom(3), Z = 4. Mizraite-(Ce) (Ce(Al11Mg)O-19; IMA 2022-027) occurs as euhedral crystals, <1-14 mu m in size, with Ce-silicate, Ti-sulfide, Ti,Al,Zr-oxide, ziroite, and thorianite in corundum Grain 198-8. Mizraite-(Ce) has an empirical formula (Ce0.76Ca0.10La0.07Nd0.01)(Sigma 0.94)(Al10.43Mg0.84Ti0.603+Si0.09Zr0.04)(Sigma 12.00)O-19 and the hexagonal P6(3)/mmc magnetoplumbite-type structure with the cell parameters: a = 5.61(1) angstrom, c = 22.29(1) angstrom, V = 608(2) angstrom(3), Z = 2. Yeite (TiSi; IMA 2022-079) occurs as irregular-subhedral crystals, 1.2-3.5 mu m in size, along with wenjiite (Ti5Si3) and zhiqinite (TiSi2) in Ti-Si alloy inclusions in corundum Grain 198c. Yeite has an empirical formula (Ti0.995Mn0.003V0.001Cr0.001)(Si0.996P0.004) and the orthorhombic Pnma FeB-type structure with the cell parameters: a = 6.55(1) angstrom, b = 3.64(1) angstrom, c = 4.99(1) angstrom, V = 119.0(4) angstrom(3), Z = 4. The five minerals are high-temperature oxide or alloy phases, formed in melt pockets in corundum xenocrysts derived from the upper mantle beneath Mt. Carmel.
Ce(Al11Mg)O19; Israel; Mt. Carmel; Ti3+2Ti4+2O7; Ti3+2Ti4+O5; TiSi; ZrO2; corundum; magnéliite; mizraite-(Ce); new minerals; sassite; yeite; ziroite
Settore GEO/06 - Mineralogia
9-dic-2023
Article (author)
File in questo prodotto:
File Dimensione Formato  
Maetal2023Materials-16-07578-v2.pdf

accesso aperto

Descrizione: Article
Tipologia: Publisher's version/PDF
Dimensione 9.32 MB
Formato Adobe PDF
9.32 MB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/1029591
Citazioni
  • ???jsp.display-item.citation.pmc??? 0
  • Scopus 4
  • ???jsp.display-item.citation.isi??? 5
social impact