TY  - JOUR
A1  - Kutzschbach, Martin
A1  - Wunder, Bernd
A1  - Wannhoff, Iris
A1  - Wilke, Franziska Daniela Helena
A1  - Couffignal, Frédéric
A1  - Rocholl, Alexander
T1  - Raman spectroscopic quantification of tetrahedral boron in synthetic aluminum-rich tourmaline
T2  - American mineralogist : an international journal of earth and planetary materials
N2  - The Raman spectra of five B-[4]-bearing tourmalines of different composition synthesized at 700 degrees C/4.0 GPa (including first-time synthesis of Na-Li-B-[4]-tourmaline, Ca-Li-B-[4]-tourmaline, and Ca-bearing square-B-[4]-tourmaline) reveal a strong correlation between the tetrahedral boron content and the summed relative intensity of all OH-stretching bands between 3300-3430 cm(-1). The band shift to low wavenumbers is explained by strong O3-H center dot center dot center dot O5 hydrogen bridge bonding. Applying the regression equation to natural B-[4]-bearing tourmaline from the Koralpe (Austria) reproduces the EMPA-derived value perfectly [EMPA: 0.67(12) B-[4] pfu vs. Raman: 0.66(13) B-[4] pfu]. This demonstrates that Raman spectroscopy provides a fast and easy-to-use tool for the quantification of tetrahedral boron in tourmaline. The knowledge of the amount of tetrahedral boron in tourmaline has important implications for the better understanding and modeling of B-isotope fractionation between tourmaline and fluid/melt, widely used as a tracer of mass transfer processes.
KW  - Tourmaline
KW  - high pressure
KW  - synthesis
KW  - tetrahedral boron
KW  - Raman
KW  - SIMS
KW  - Lithium
KW  - Beryllium and Boron: Quintessentially Crustal
Y1  - 2021
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/64667
SN  - 0003-004X
SN  - 1945-3027
VL  - 106
IS  - 6
SP  - 872
EP  - 882
PB  - Mineralogical Society of America
CY  - Washington, DC [u.a.]
ER  -