Material Index for the Spectroscopy Database

Material Index

Name	Formula	Classifications	Members	Image	Specimens	Lines	Spectra	Techniques	Tags
Eudidymite	Na₂Be₂Si₆O₁₅·H₂O	Minerals containing H2O	—	Eudidymite A eudidymite fan" with dark green aegirine crystals, from Poudrette quarry, Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada - FOV 3.1 x 1.8 mm Photo by Modris Baum (via wikimedia.org), Public Domain	0	2	0	PL/XL	Mineral, Silicate , Hydrated
Europium fluoride	EuF₃	REE fluoride	—		1	9	1	CL/SEM	REE, Halide , Synthetic , Compound
Europium ultraphosphate	EuP₅O₁₄	REE ultraphosphate	—		1	15	2	CL/SEM, SXES	Phosphate , REE, Synthetic , Compound , Ultraphosphate
Fayalite	Fe₂SiO₄, (Fe^II,Mg)₂(SiO₄), Fe^II₂(SiO₄)	Minerals containing SiO4, Olivine, Forsterite-Fayalite (series)	—		2	0	0	—	Mineral, Silicate
Fedorite	(K,Na)_2.5(Ca,Na)₇Si₁₆O₃₈(OH,F)₂·3.5H₂O	Minerals containing H2O, Minerals containing OH	—	Fedorite Fibrous foliated, violet Charoite aggregation with black radiating Aegirine (Aegirine suns") and orange Fedorite crystals, from Vostochnyi Mine, Murun-Massif, Yakutia, Russia © Raimond Spekking / CC BY-SA 4.0 (via Wikimedia Commons)	0	4	0	PL, PL/XL	Hydroxide , Mineral, Silicate , Hydrated
Fedorovskite	Ca₂Mg₂B₄O₇(OH)₆	Minerals containing OH	—	Fedorovskite Outstanding brown crystals of the very rare mineral fedorovskite from the type locality in Buryatia (Solongo, Ozernoe Area, Buryatia Republic, Russian Federation). Ex.Dr.Hartel collection with label included Photo (C) 2019 David Hospital (via Wikimedia Commons), CC-BY-SA 4.0	0	2	0	PL/XL	Hydroxide , Mineral, Borate
Feldspar (group)	KAlSi₃O₈ - NaAlSi₃O₈ - CaAl₂Si₂O₈	—	Stronalsite, Alkali feldspar (var. Microcline perthite), Reedmergnerite, Celsian, Paracelsian, Alkali feldspar, Plagioclase, Feldspar (var. Ba), Hexacelsian, Svyatoslavite, Kumdykolite, Banalsite, Filatovite, Slawsonite, Buddingtonite	Feldspar (group) Plagioclase feldspar displaying cleavage Photo via USGS, Public Domain	0	250	35	CL, CL/SEM, EDS, Reflectance, SXES	Aluminosilicate , Group
Feldspathoid (group)	—	—	Trikalsilite, Sodalite (group), Calcrinite (group), Kalsilite, Trinepheline, Leucite, Yoshiokaite, Davidsmithite, Nepheline		0	167	4	CL, CL/SEM	Aluminosilicate , Group
Ferberite	Fe^II(WO₄)	Minerals containing W[VI]O4	—	Ferberite Image of specimen 'M2290 Wolframite' [CSIRO]. (C) 2026 CSIRO Mineral Resources. All rights reserved.	10	0	1	Reflectance	Mineral, Tungstate
Fergusonite-(Y)	YNbO₄	—	—	Fergusonite-(Y) Very sharp, lustrous, black crystals of Fergusonite-(Y) to 1.0 cm in parallel-growth very nicely set on a glassy cleavage of banded smoky quartz. From Ambalabe pegmatite, Manapa pegmatite Field, Betafo District, Vakinankaratra Region, Antananarivo Provin Photo by Rob Lavinsky, iRocks.com – CC-BY-SA-3.0	0	7	0	Raman	Mineral , REE, Niobate
Ferro-actinolite	☐Ca₂(Mg_2.5-0.0Fe^II_2.5-5.0)Si₈O₂₂(OH)₂	Actinolite root name group, Ferro-actinolite-Tremolite (series), Minerals containing OH	—		0	2	0	Reflectance	Hydroxide , Mineral, Silicate
Ferro-actinolite-Tremolite (series)	◻Ca₂Fe^II₅(Si₈O₂₂)(OH)₂ — ◻Ca₂Mg₅(Si₈O₂₂)(OH)₂	Calcium amphibole	Actinolite, Ferro-actinolite, Tremolite, Tremolite (var. fibrous), Actinolite (var. fibrous), Nephrite		0	18	6	Reflectance	Silicate , Hydroxide, Series
Ferro-ferri-hornblende	☐Ca₂(Fe^II₄Fe^III)(Si₇Al)O₂₂(OH)₂	Minerals containing OH, Hornblende root name group	—		1	0	0	—	Hydroxide , Mineral, Silicate
Ferro-glaucophane	☐Na₂(Fe^II₃Al₂)Si₈O₂₂(OH)₂	Minerals containing OH, Glaucophane root name group	—		1	0	0	—	Hydroxide , Mineral, Aluminosilicate
Ferruccite	NaBF₄	—	—		0	5	0	IR	Mineral, Halide