Muscovite-2M1 : CSIRO Spectroscopy Database

Muscovite-2M1 [ KAl₂(Si₃Al)O₁₀(OH)₂ ]

Material properties

Formula	KAl₂(Si₃Al)O₁₀(OH)₂
Variant	Cr
Classification	Muscovite
Search other databases	webmineral.com, mindat.org, rruf.info, mineralienatlas.de, Handbook of Mineralogy, American Mineralogist Crystal Structure Database
Crystal symmetry	Monoclinic
Tags	Hydroxide , Polytype, Aluminosilicate

Composition

Element	Atoms
K	1
O	12
Si	3
Al	3
H	2
Total:	21

Specimens of Muscovite-2M1

Name	Owner	Materials	Phase purity	Image	Spectra	Techniques
MES135 Eucryptite	CSIRO	Albite, Eucryptite, Muscovite, Muscovite-1M, Muscovite-2M1 (4.0%)	4.0	MES135 Eucryptite Image of Eucryptite, Albite and Muscovite in specimen 'MES135 Eucryptite' [CSIRO]. (C) 2026 CSIRO Mineral Resources. All rights reserved.	1	Reflectance
M2753 Azurite	CSIRO	Azurite, Goethite, Al, Muscovite, Muscovite-1M, Muscovite-2M1 (3.8%), Quartz	3.8	M2753 Azurite Image of specimen 'M2753 Azurite' [CSIRO]. (C) 2026 CSIRO Mineral Resources. All rights reserved.	0	—
MES103 Labradorite	CSIRO	Albite, Ca, Labradorite, Microcline, Muscovite-2M1 (3.8%), Quartz	3.8	MES103 Labradorite Image of specimen 'MES103 Labradorite' [CSIRO], from Ottawa, Ontario, Canada. Size: 20×14×13mm. (C) 2025 CSIRO Mineral Resources. All rights reserved.	0	—
M2253 Covellite	CSIRO	Chalcanthite, Chalcopyrite, Covellite, Muscovite-1M, Muscovite-2M1 (3.2%), Orthoclase, Quartz	3.2	M2253 Covellite Image of specimen 'M2253 Covellite' [CSIRO]. (C) 2026 CSIRO Mineral Resources. All rights reserved.	0	—
M2500 Siderite	CSIRO	Muscovite, Muscovite-1M, Muscovite-2M1 (3.0%), Quartz, Siderite, Siderite, Mg, Ca	3.0	M2500 Siderite Image of specimen 'M2500 Siderite' [CSIRO]. (C) 2026 CSIRO Mineral Resources. All rights reserved.	0	—
M0774 Goethite	CSIRO	Goethite, Microcline, Muscovite, Muscovite-1M, Muscovite-2M1 (2.8%), Quartz	2.8	M0774 Goethite Image of specimen 'M0774 Goethite' [CSIRO]. (C) 2026 CSIRO Mineral Resources. All rights reserved.	0	—
MT8407 Meionite	CSIRO	Kaolinite, Meionite, Montmorillonite, Muscovite, Muscovite-1M, Muscovite-2M1 (2.7%), Prehnite, Pumpellyite-(Mg), Cr, Scapolite (group)	2.7	MT8407 Meionite Image of specimen 'MT8407 Meionite' [CSIRO]. (C) 2026 CSIRO Mineral Resources. All rights reserved.	1	Reflectance
MT8503 Oligoclase	CSIRO	Muscovite-2M1 (2.6%), Oligoclase, Quartz	2.6	MT8503 Oligoclase Image of Oligoclase, Muscovite-2M1 and Quartz in specimen 'MT8503 Oligoclase' [CSIRO]. (C) 2026 CSIRO Mineral Resources. All rights reserved.	0	—
M2096 Scheelite	CSIRO	Ankerite, Arsenopyrite, Fluorapatite, Muscovite-2M1 (2.4%), Pyrite, Quartz, Scheelite	2.4	M2096 Scheelite Image of specimen 'M2096 Scheelite' [CSIRO]. (C) 2026 CSIRO Mineral Resources. All rights reserved.	0	—
NR118 Microcline	CSIRO	Albite, Ca, Microcline, Muscovite-2M1 (2.3%), Quartz	2.3	NR118 Microcline Image of Microcline, Albite (var. Ca), Muscovite-2M1 and Quartz in specimen 'NR118 Microcline' [CSIRO]. (C) 2026 CSIRO Mineral Resources. All rights reserved.	0	—
M1155 Apatite (manganoan)	CSIRO	Apatite, Mn, Calcite, Fluorapatite, Muscovite, Muscovite-1M, Muscovite-2M1 (2.0%), Quartz	2.0	M1155 Apatite (manganoan) Image of specimen 'M1155 Apatite (manganoan)' [CSIRO]. (C) 2026 CSIRO Mineral Resources. All rights reserved.	0	—
M1611 Microcline	CSIRO	Albite, Ca, Microcline, Muscovite-2M1 (2.0%), Quartz	2.0	M1611 Microcline Image of specimen 'M1611 Microcline' [CSIRO]. (C) 2026 CSIRO Mineral Resources. All rights reserved.	0	—
M2393 Albite	CSIRO	Albite, Muscovite-2M1 (2.0%)	2.0	M2393 Albite Image of Albite specimen 'Albite M2393' (CSIRO) from South Dakota, USA (C) 2014 CSIRO. All rights reserved.	2	Reflectance
MES300 Cookeite	CSIRO	Albite, Cookeite, Microcline, Muscovite, Muscovite-1M, Muscovite-2M1 (2.0%), Quartz	2.0	MES300 Cookeite Image of Cookeite, Albite, Microcline, Muscovite and Quartz in specimen 'MES300 Cookeite' [CSIRO]. (C) 2026 CSIRO Mineral Resources. All rights reserved.	1	Reflectance
M0186 Stibnite	CSIRO	Calcite, Mg, Litharge, Muscovite-1M, Muscovite-2M1 (1.7%), Quartz, Siderite, Mg, Ca, Siderite, Stibnite, Wüstite	1.7	M0186 Stibnite Image of Calcite (var. Mg), Litharge, Muscovite-1M, Muscovite-2M1, Quartz, Siderite, Siderite (var. Mg, Ca), Stibnite and Wüstite in specimen 'M0186 Stibnite' [CSIRO]. (C) 2025 CSIRO Mineral Resources. All rights reserved.	0	—
M1284 Orthoclase	CSIRO	Albite, Ca, Microcline, Muscovite-2M1 (1.3%), Orthoclase, Quartz	1.3	M1284 Orthoclase Image of specimen 'M1284 Orthoclase' [CSIRO]. (C) 2026 CSIRO Mineral Resources. All rights reserved.	0	—
M1289 Oligoclase	CSIRO	Microcline, Muscovite-2M1 (1.1%), Oligoclase	1.1	M1289 Oligoclase Image of specimen 'M1289 Oligoclase' [CSIRO]. (C) 2026 CSIRO Mineral Resources. All rights reserved.	0	—
M1296 Petalite	CSIRO	Albite, Ca, Microcline, Muscovite-2M1 (1.0%), Orthoclase, Petalite, Quartz	1.0	M1296 Petalite Image of specimen 'M1296 Petalite' [CSIRO]. (C) 2026 CSIRO Mineral Resources. All rights reserved.	1	Reflectance