Lucchesiite
Lucchesiite is a new member of tourmaline-group of minerals. Lucchesiite has the formula CaFe3Al6(Si6O18)(BO3)3(OH)3O. It is the calcium and oxygen-analogue of schorl. It has two co-type localizations, one in Czech Republic and the other in Sri Lanka. As the other members of the tourmaline group, it is trigonal.
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Lucchesiite
Lucchesiite is a new member of tourmaline-group of minerals. Lucchesiite has the formula CaFe3Al6(Si6O18)(BO3)3(OH)3O. It is the calcium and oxygen-analogue of schorl. It has two co-type localizations, one in Czech Republic and the other in Sri Lanka. As the other members of the tourmaline group, it is trigonal.
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Lucchesiite is a new member of ...... rmaline group, it is trigonal.
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category
Cyclosilicates
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Tourmaline group
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class
Ditrigonal pyramidal
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color
Black
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density
formula
CaFe3Al633O
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fracture
Conchoidal
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habit
Thin tablets
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luster
Vitreous
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name
Lucchesiite
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opticalprop
Uniaxial
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pleochroism
Very dark brown to light brown
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streak
Grey
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symmetry
system
tenacity
Brittle
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unit cell
a = 16.00, c = 7.21 [Å] ; Z = 3
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Lucchesiite is a new member of ...... rmaline group, it is trigonal.
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label
Lucchesiite
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name
Lucchesiite
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