DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: HS282

MINERAL_TYPE: Cyclosilicate

MINERAL: Tourmaline (Tourmaline group)

FORMULA: (Na,Ca)(Li,Mg,Al)(Al,Fe,Mn)6(BO3)3(Si6O18)(OH)4

FORMULA_HTML: (Na,Ca)(Li,Mg,Al)(Al,Fe,Mn)₆(BO₃)₃(Si₆O₁₈)(OH)₄

COLLECTION_LOCALITY: Australia

ORIGINAL_DONOR: Hunt and Salisbury Collection

CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

SAMPLE_DESCRIPTION:

This sample is brown. The spectrum shows intense features near 0.75 µ and 1.1 µ, due to transitions in ferric and ferrous iron, respectively, and features in the 1.4 and 2.2 to 2.4 µ region.

Sieve interval 74 - 250µm.

Hunt, G.R., J.W. Salisbury, and C.J. Lenhoff, 1973, Visible and near-infrared spectra of minerals and rocks: VI. Additional silicates. Modern Geology, v. 4, p. 85-106.

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

Tourmaline + medium amount of mica + medium amount of other; M: ~10% feldspar, ~10% muscovite, no HCl fizz

END_XRD_ANALYSIS.

COMPOSITIONAL_ANALYSIS_TYPE: None # XRF, EM(WDS), ICP(Trace), WChem

COMPOSITION_TRACE:

COMPOSITION_DISCUSSION:

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION:

END_SPECTROSCOPIC_DISCUSSION.

SPECTRAL_PURITY: 1_2_3_4_

LIB_SPECTRA_HED: where Wave Range Av_Rs_Pwr Comment

LIB_SPECTRA: splib04a r 5022 0.2-3.0µm 200 g.s.=

LIB_SPECTRA: splib05a r ____ 0.2-3.0µm 200 g.s.=

LIB_SPECTRA: splib06a r ____ 1.5-25µm 250 g.s.=