Material Index for the Spectroscopy Database

Material Index

Name	Formula	Classifications	Members	Image	Specimens	Lines	Spectra	Techniques	Tags
Molybdenite	MoS₂	—	Molybdenite-2H, Molybdenite-3R	Molybdenite Image of molybdenite (MoS2) in specimen 'AR-057' (CSIRO), from Alan Reid Collection. Size: 5cm Photo by Zs. Pintér. (C) 2025 CSIRO Mineral Resources. All rights reserved.	0	2	0	IR	Mineral, Sulphide
Molybdenite-2H	MoS₂	Molybdenite	—		8	0	0	—	Sulphide , Polytype
Molybdenite-3R	MoS₂	Molybdenite	—		2	0	0	—	Sulphide , Polytype
Molybdenum	Mo	—	—	Molybdenum Molybdenum, e-beam remelted macro crystalline fragment. Purity 99.99 % (= 4N"), as well as a high purity single crystalline (99.999 % = 5N) 1 cm3 molybdenum cube for comparison. Photo by Alchemist-hp (www.pse-mendelejew.de), Free Art License (http://artlibre.org/licence/lal/en/)	2	10	3	SXES	Metal , Element
Molybdoscheelite	Ca(W,Mo)O₄	Scheelite	—		0	10	0	PL, PL/XL	Variety, Tungstate , Molybdate
Monazite	REE(PO₄)	REE phosphate, Monazite (group)	Monazite-(Ce), Monazite-(La), Monazite-(Nd), Monazite-(Sm)	Monazite Image of Monazite-(Ce), Ilmenite and Quartz in specimen 'M 12149' (Museums Victoria) from Victoria, Australia Photograph by Frank Coffa, Museums Victoria, CC-BY-4.0	13	0	5	Reflectance	Orthophosphate , Phosphate, Informal
Monazite-(Ce)	(Ce,Th)PO₄, (Ce,Ca)PO₄, CePO₄	REE phosphate, Minerals containing PO4, Monazite	—	Monazite-(Ce) Monazite-(Ce) specimen from Norway Photo by Penland, via Smithsonian National Museum of Natural History	9	115	11	CL, EDS, PL/Laser	Phosphate , Mineral , REE, Orthophosphate
Montebrasite	LiAl(PO₄)(OH)	Amblygonite (group), Minerals containing OH, Minerals containing PO4	—	Montebrasite Montebrasite specimen from Linópolis, Divino das Laranjeiras, Doce valley, Minas Gerais, Brazil. Specimen is from the inventory of Milton Sklar 1972. Scale bar indicates 1 inch and 1 cm Photob by Rock Currier (on wikimedia.org), CC-BY 3.0	4	12	4	Reflectance	Mineral, Orthophosphate , Phosphate , Hydroxide
Monticellite	CaMgSiO₄	Minerals containing SiO4, Olivine	—	Monticellite Sharp, freestanding monticellite crystals on semilustrous brown vesuvianite (idocrase) crystals, from Crestmore quarries, Crestmore, Riverside Co., CA, USA Rob Lavinsky, iRocks.com – CC-BY-SA-3.0	0	3	0	CL/OM, Unknown	Mineral, Silicate
Montmorillonite	(Na,Ca)_0.3(Al,Mg)₂Si₄O₁₀(OH)₂·nH₂O, (Na,Ca)_0.3(Al,Mg,Fe)₂Si₄O₁₀(OH)₂·nH₂O	Smectite (group), Minerals containing OH, Minerals containing H2O	—	Montmorillonite Montmorillonite, from High Bridge, Jessamine Co., Kentucky, USA Photo by Ken Larsen, Smithsonian Institution, CC0	18	2	0	IR, Reflectance	Hydroxide , Mineral, Hydrated , Aluminosilicate
Mullite	Al_4+2xSi_2-2xO_10-x (x ≈ 0.4)	Sillimanite (subgroup)	—	Mullite Mullite specimen from Emmelberg Mt., Üdersdorf, Daun, Eifel Mts, Rhineland-Palatinate, Germany Photo by Leon Hupperichs (on wikimedia.org), CC-BY-SA 3.0	0	2	0	CL/OM	Mineral, Aluminosilicate
Muscovite	KAl₂(Si₃Al)O₁₀(OH)₂	Mica, Minerals containing OH	Muscovite-2M1, Cr, Sericite, Illite, Muscovite-1M, Mg, Muscovite-2M1, Muscovite-1M	Muscovite Image of a specimen of Muscovite (M 32217, Museums Victoria), from Victoria, Australia Photograph by Frank Coffa, Museums Victoria, CC-BY	4	14	7	CL, EDS, Reflectance	Hydroxide , Mineral, Aluminosilicate
Muscovite-1M	KAl₂(Si₃Al)O₁₀(OH)₂	Muscovite	—		24	0	0	—	Hydroxide , Aluminosilicate , Polytype
Muscovite-2M1	KAl₂(Si₃Al)O₁₀(OH)₂	Muscovite	—		44	0	0	—	Hydroxide , Aluminosilicate , Polytype