Batoniite (original) (raw)

A valid IMA mineral species

About BatoniiteHide

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Formula:

Al8(SO4)5(OH)14(H2O)18 · 5H2O

Colour:

white to colorless

Specific Gravity:

1.949 (Calculated)

Name:

Named in honour of Massimo Batoni (born 6 April 1948), vice-president of AMI - Associazione Micromineralogica Italiana.

New structure type. Seems to be one of the most structurally complex mineral to date (however, compare ewingite, morrisonite, and ilmajokite-(Ce)).

Bears a most likely unique octameric [Al8(OH)14(H2O)18]10+ cluster.

Its genesis is likely due to interaction of sulfuric acid and Al-bearing Paleozoic rocks cropping out in the Garibaldi Tunnel (the lowest mining level of the Cetine di Cotorniano Mine).

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:470773:4

979f208e-bbf9-4b37-9c7c-2bb6066f1ba3

IMA Classification of BatoniiteHide

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Approval history:

IMA no. 2023-008

Classification of BatoniiteHide

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7.DA.

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
A : With small cations

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 BatoniiteHide

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Colour:

White to colorless

Cleavage:

Perfect
shows a {011} perfect cleavage; there are other less distinct cleavage surfaces, but their crystallographic orientation was not determined.

Density:

1.949 g/cm3 (Calculated)

Optical Data of BatoniiteHide

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RI values:

_n_α = 1.483(6) _n_β = 1.495(6) _n_γ = 1.502(5)

2V:

Measured: 71° (1), Calculated: 75.8°

δ = 0.019

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Chemistry of BatoniiteHide

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Mindat Formula:

Al8(SO4)5(OH)14(H2O)18 · 5H2O

Chemical AnalysisHide

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Empirical formulas:

Sample references:

Crystallography of BatoniiteHide

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Class (H-M):

1 - Pinacoidal

Cell Parameters:

a = 9.1757(6) Å, b = 12.0886(9) Å, c = 20.9218(15) Å
α = 82.901(3)°, β = 87.334(3)°, γ = 86.999(2)°

Ratio:

a:b:c = 0.759 : 1 : 1.731

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Type Occurrence of BatoniiteHide

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General Appearance of Type Material:

hemispherical aggregates composed of brittle tabular crystals, up to 1 mm in size

Place of Conservation of Type Material:

collections of the Museo di Storia Naturale, Università di Pisa, Via Roma 79, Calci (PI), Italy, catalogue number 20028

Geological Setting of Type Material:

action of H2SO4 on Al-bearing rocks of Paleozoic age

Associated Minerals at Type Locality:

Synonyms of BatoniiteHide

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Related Minerals - Strunz-mindat GroupingHide

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Fluorescence of BatoniiteHide

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Other InformationHide

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Notes:

Batoniite is slowly soluble in H2O; it is affected by dehydration of under chamber vacuum.

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 BatoniiteHide

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References for BatoniiteHide

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Reference List:

Mauro, Daniela, Biagioni, Cristian, Sejkora, Jiří, Dolníček, Zdeněk, Škoda, Radek (2023) Batoniite, Al8(OH)14(H2O)185 ⋅ 5H2O, a new mineral with the [Al8(OH)14(H2O)18]10+ polyoxocation from the Cetine di Cotorniano Mine, Tuscany, Italy. European Journal of Mineralogy, 35 (5) 703-714 doi:10.5194/ejm-35-703-2023

Localities for BatoniiteHide

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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.