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16.14.02: Acroita

Última actualización

30 oct 2022
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- 16.14.01: Liddicoatita
- 16.14.03: Bicolor

gemology
Gemology Project

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Turmalina de acroita
Composición química	Borosilicato complejo
Sistema de cristal	Trigonal
Hábito	Prismático
Escote	Ninguno
Fractura	Concoidal
Dureza	7- 7.5
Naturaleza óptica	Uniaxial -
Índice de refracción	1.62 - 1.64
Birrefringencia	0.014 - 0.040
Dispersión	Bajo, 0.017
Gravedad específica	3.01 - 3.11
Lustre	Vítreo
Pleocroísmo	Fuerte

NaLi _2.5 Al _6.5 (BO ₃) ₃ O ₁₈ (OH) ₄

Figura $\PageIndex{1}$ : Cristal de Acroita, Pakistán

La acroita es una variedad incolora de turmalina que suele ser (pero no siempre) elbaita.

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