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Schorl-1A
A variety of Schorl
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Formula:
NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
Colour:
Dark brownish
Crystal System:
Triclinic
First Recorded Locality:
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
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 Identifiers
Mindat ID:
471320 (as Schorl-1A)
3578 (as Schorl)
3578 (as Schorl)
Long-form identifier:
mindat:1:1:471320:9 (as Schorl-1A)
mindat:1:1:3578:7 (as Schorl)
mindat:1:1:3578:7 (as Schorl)
Similar Names
Physical Properties of Schorl-1A
Colour:
Dark brownish
Chemistry of Schorl-1A
Mindat Formula:
NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
Element Weights:
Crystallography of Schorl-1A
Crystal System:
Triclinic
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)°
α = 113.7519(8)°, β = 104.5539(8)°, γ = 104.6823(9)°
Ratio:
a:b:c = 0.759 : 1 : 0.999
Unit Cell V:
527.835 ų
Z:
18
Comment:
space-group R1
First Recorded Occurrence of Schorl-1A
Other Information
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-1A
mindat.org URL:
https://www.mindat.org/min-471320.html
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References for Schorl-1A
Reference List:
Cámara, F.; Bosi, F.; Skogby, H.; Hålenius, U.; Celata, B.; Ciriotti, M.E. (2022) Schorl-1A from Langesundsfjord (Norway). Journal of Geosciences, 67 (2). 129-139 doi:10.3190/jgeosci.344
Localities for Schorl-1A
Showing 2 localities.
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The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Australia (FRL) | |
| Miyawaki et al. (2022) +1 other reference |
Norway | |
| Cámara et al. (2022) |
