Toledoite (original) (raw)

A valid IMA mineral species

Specific Gravity:

5.53 (Calculated)

Crystal System:

Orthorhombic

Name:

The name was given in honor of Vered Toledo (b. 1968), of Shefa Gems Ltd. for her support and for providing corundum xenocrysts from the Mount Carmel region for this investigation of new minerals.

Known synthetic analogue.

Chemically not unique - compare, e.g., zangboite, UM1986-59-Si:FePTi, UM1989-10-E:FeSiTi, ...

As inclusions in corundum xenocrysts (compare mizraite-(Ce), sassite, ziroite).

TiFeSi-type structure. The structure is a superstructure of the hexagonal ordered Fe2P-type [19]. Synthetic TiFeSi may also show the hexagonal P-62m β-form polymorph (a = 6.257(2), c = 3.497(1) (Å), V = 118.55(9) Å3), which is stable at high-T, but inverts to the orthorhombic phase after annealing at 1273 K for seven days.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:56112:7

09cf00a4-cf79-4a31-8f4d-7320bfc461da

IMA Classification of ToledoiteHide

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Approval history:

IMA no. 2022-036

Type description reference:

Ma, Chi, Cámara, Fernando, Bindi, Luca, Griffin, William L. (2024) Toledoite, TiFeSi, a New Mineral from Inclusions in Corundum Xenocrysts from Mount Carmel, Israel. Crystals, 14 (1) doi:10.3390/cryst14010096

Classification of ToledoiteHide

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1.BB.

1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
B : Metallic Carbides, Silicides, Nitrides, Phosphides and Hydrides
B : Silicides

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Physical Properties of ToledoiteHide

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Density:

5.53 g/cm3 (Calculated)

Chemistry of ToledoiteHide

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Chemical AnalysisHide

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Empirical formulas:

Sample references:

Crystallography of ToledoiteHide

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Crystal System:

Orthorhombic

Class (H-M):

m _m_2 - Pyramidal

Cell Parameters:

a = 7.00(1) Å, b = 10.83(1) Å, c = 6.29(1) Å

Ratio:

a:b:c = 0.646 : 1 : 0.581

Unit Cell V:

476.84 ų (Calculated from Unit Cell)

Comment:

a rarely seen space group

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Type Occurrence of ToledoiteHide

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General Appearance of Type Material:

occurs as irregular crystals 2–16 μm in size

Place of Conservation of Type Material:

mineralogical collections of the Università di Milano, Via Mangiagalli 34, 20133 Milano, Italy, registration number MCMGPG-H2021-006

Geological Setting of Type Material:

A high-temperature alloy phase, formed under extremely reduced conditions in melt pockets in corundum xenocrysts derived from the upper mantle beneath Mount Carmel in Israel.

Associated Minerals at Type Locality:

Synonyms of ToledoiteHide

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Related Minerals - Strunz-mindat GroupingHide

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Other InformationHide

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Health Risks:

No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for ToledoiteHide

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References for ToledoiteHide

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Reference List:

Ma, Chi, Cámara, Fernando, Bindi, Luca, Griffin, William L. (2024) Toledoite, TiFeSi, a New Mineral from Inclusions in Corundum Xenocrysts from Mount Carmel, Israel. Crystals, 14 (1) doi:10.3390/cryst14010096

Localities for ToledoiteHide

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This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.