DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: ISR202

MINERAL_TYPE: Phyllosilicate

MINERAL: Rectorite

FORMULA: Al2Si4O10(OH)2 + (Mg,Fe+2,Al)3(Al,Si)4O10(OH)2*4H2O

FORMULA_HTML: Al₂Si₄O₁₀(OH)₂ + (Mg,Fe⁺²,Al)₃(Al,Si)₄O₁₀(OH)₂•4H₂O

COLLECTION_LOCALITY: Garland County, Arizona

ORIGINAL_DONOR:

CURRENT_SAMPLE_LOCATION: CSES/CIRES, Univ. of CO, Boulder

ULTIMATE_SAMPLE_LOCATION: CSES/CIRES, Univ. of CO, Boulder

SAMPLE_DESCRIPTION:

Rectorite, a clay mineral, is a regular interstratification of a dioctahedral mica and a dioctahedral smectite.

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

END_XRD_ANALYSIS.

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

COMPOSITION_TRACE:

COMPOSITION_DISCUSSION:

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

mode:
Rectorite dominates
20 vol% quartz
muscovite & chlorite undetermined

quartz avg gr sz = 300 µm
all others avg gr sz = 35 µm

Rectorite forms fine intergrowths with muscovite & chlorite

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 4155 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.=