Muscovite

Spectrum Details

Modality

FTIR

Category

mineral

Material Type

Phyllosilicate

Sample ID

GDS107

Collection Locality

Mt. Turner, Australia

Spectral Purity

1a2a3a4_ # GDS107 # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns

Composition / XRD

None # XRF, EPMA, ICP(Trace), WChem COMPOSITION_TRACE:

Sample Description

IMAGE_OF_SAMPLE:

XRD Analysis

40 kV - 30 mA, 6.5-9.5 keV File: muscv107.mdi (smear on quartz plate) References: Huebner's reference patterns; Bailey (1988); JCPDS #06-0263 Found: Dioctahedral 2M1 mica (probably muscovite) Comment: Pattern contains strong, narrow basal reflections and weak to moderate, broad non-basal reflections. The alpha1-alpha2 reflections are not resolved. Comparison with strip charts indicates the mica is dioctahedral. Using the criteria of Bailey (1988) for muscovite polytypes, the mica is 2M1. The pattern is very similar to that of JCPDS #06-0263, a 2M1 muscovite. The position of the (004) reflection indicates that the mica is potassic.

X Units

cm⁻¹

Y Units

Absorbance

Data Points

1,801