Material Index for the Spectroscopy Database

Material Index

Name	Formula	Classifications	Members	Image	Lines	Techniques	Tags
Cr spinel	(Fe^II,Mg)(Cr^III,Al)₂O₄	Spinel (subgroup)	—		0	—	—
Crandallite	(Ca,REE)Al₃(PO₄)(PO₃OH)(OH)₆, CaAl₃(PO₄)(PO₃OH)(OH)₆	Plumbogummite (group)	—	Crandallite A polished slab of variscite (green), crandallite (yellow) and wardite (grey), from Little Green Monster Variscite Mine, Clay Canyon, Fairfield, Oquirrh Mts, Utah County, Utah, USA. Size: 6.8 x 5.6 x 0.5 cm. © Rob Lavinsky, iRocks.com – CC-BY-SA-3.0	0	—	Mineral, Hydroxide , Phosphate , Orthophosphate
Creedite	Ca₃Al₂(SO₄)(OH)₂F₈·2H₂O	—	—	Creedite Creedite specimen from Akchatau, Shet District, Karaganda, Kazakhstan © Photo by Chip Clark, via Smithsonian National Museum of Natural History	4	—	Hydrated , Mineral, Hydroxide , Halide , Sulphate
Cristobalite	SiO₂	Silica	—	Cristobalite Cristobalite on obsidian from Canyon Butte, Siskiyou County, California, USA © Rob Lavinsky, iRocks.com – CC-BY-SA-3.0	3	—	Mineral, Simple oxide
Crocoite	PbCrO₄	—	—	Crocoite Crocoite specimen from Red Lead mine, Zeehan, Tasmania, Australia © Unknown photographer, courtesy Smithsonian National Museum of Natural History	1	—	Mineral
Cronstedtite	(Fe^II,Fe^III)₃(Si,Fe^III)₂O₅(OH)₄	Serpentine (subgroup)	—		0	—	Mineral, Hydroxide , Silicate
Cryolite	Na₃AlF₆	—	—	Cryolite Cryolite specimen from the Ivigtut Cryolite deposit, Ivittuut, Arsuk Firth, Arsuk, Kitaa Province, Greenland. Size: 8.8 x 6.7 x 5 cm © Photo by Didier Descouens (via Wikimedia Commons), CC-BY-SA-3.0	5	—	Mineral, Halide
Cryolithionite	Na₃Al₂(LiF₄)₃	—	—	Cryolithionite White massive cryolithionite from Ivigtut, Ivittuut, Arsuk Fjord, Sermersooq, Greenland. © Photo by David Hospital (via Wikimedia Commons), CC-BY-SA 4.0	1	—	Mineral, Halide
Cummingtonite	☐Mg₂Mg₅Si₈O₂₂(OH)₂	Mg-Fe-Mn amphibole, Cummingtonite-Grunerite (series)	—		2	—	Mineral, Hydroxide , Silicate
Cummingtonite-Grunerite (series)	◻{Mg₂}{Mg₅}(Si₈O₂₂)(OH)₂ — ◻{Fe^II₂}{Fe^II₅}(Si₈O₂₂)(OH)₂	Mg-Fe-Mn amphibole	Cummingtonite, Grunerite		4	—	Hydroxide , Silicate , Series
Cuprospinel	Cu^IIFe^III₂O₄	Spinel (subgroup)	—		0	—	Mineral
Curite	Pb₃(H₂O)₂[(UO₂)₄O₄(OH)₃]₂	—	—	Curite Curite from Katanga, DR Congo, exhibited at the Mineralogical Museum, Bonn, Germany © Photo by Elke Wetzig, CC-BY-SA	4	—	Uranyl , Mineral, Hydroxide , Hydrated
Cyclosilicate	[Si_nO_3n]^2n-	—	—		4	—	Group
Cyrtolite	Zr[(SiO₄),(OH)₄]	Zircon	—		0	—	Silicate , Hydroxide, Variety