Schorl-1A (original) (raw)

A variety of Schorl

A structural variant of the tourmaline mineral scorl, considered as "the triclinic dimorph" of schorl, but not to be regarded as a separate mineral species (Bosi et al. 2022). Originally described as luinaite-(OH), a monoclinic tourmaline. The luinaite-(OH) from the type locality Cleveland tin mine, Heazlewood district, Waratah-Wynyard municipality, Tasmania, Australia), was however found to be triclinic and luinaite-(OH) was descredited in 2022 (IMA Proposal 21-L).

A reported luinaite-(OH) from Langesundsfjorden, Norway has found to be schorl-1A (Langesundsfjorden, Norway (Cámara et al. 2022).
Other reported luinaite-(OH) has been found to be either oxy-dravite-1A (triclinic) or schorl-1M (monoclinic).

See also messageboard at https://www.mindat.org/mesg-588968.html#589079

Unique IdentifiersHide

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Mindat ID:

471320 (as Schorl-1A)
3578 (as Schorl)

Long-form identifier:

mindat:1:1:471320:9 (as Schorl-1A)
mindat:1:1:3578:7 (as Schorl)

e1b39763-0d8c-4d33-b689-fab900d3e155 (as Schorl-1A)
115ca1d1-3881-44ec-87c5-36da4a046f19 (as Schorl)

Physical Properties of Schorl-1AHide

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Crystallography of Schorl-1AHide

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Cell Parameters:

a = 7.20820(10) Å, b = 9.5000(2) Å, c = 9.4947(2) Å
α = 113.7519(8)°, β = 104.5539(8)°, γ = 104.6823(9)°

Ratio:

a:b:c = 0.759 : 1 : 0.999

First Recorded Occurrence of Schorl-1AHide

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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 Schorl-1AHide

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References for Schorl-1AHide

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Reference List:

Cámara, F., Bosi, F., Skogby, H., Hålenius, U., Celata, B., Ciriotti, M. E. (2022) Schorl-1_A_ from Langesundsfjord (Norway) Journal of GEOsciences, 67 (2) 129-139

Bosi, Ferdinando, Skogby, Henrik, Hålenius, Ulf, Ciriotti, Marco E., Mills, Stuart J. (2022) Lowering R3m Symmetry in Mg-Fe-Tourmalines: The Crystal Structures of Triclinic Schorl and Oxy-Dravite, and the Mineral luinaite-(OH) Discredited. Minerals, 12 (4) 430 doi:10.3390/min12040430

Localities for Schorl-1AHide

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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.