Ianthinite

Jantinit

UO₂ • 5UO₃ • 10H₂O

orthorhombic

Ice

Jég

H₂O

hexagonal

Idaite

Idait

Cu₃FeS₄ (?)

hexagonal

Idrialite

Idrialit

C₂₂H₁₄

orthorhombic

Iimoriite-(Y)

Iimoriit-(Y)

Y₂(SiO₄)(CO₃)

triclinic

Ikaite

Ikait

CaCO₃ • 6H₂O

monoclinic

Ikranite

Ikranit

(Na, H₃O)₁₅(Ca, Mn, REE)₆Fe³⁺₂Zr₃(o, Zr)( o, Si)Si₂₄O₆₆(O, OH)₆Cl • nH₂O

trigonal

Ikunolite

Ikunolit

Bi₄(S, Se)₃

trigonal

Ilesite

Ilesit

(Mn²⁺, Zn, Fe²⁺)SO₄ • 4H₂O

monoclinic

Ilímaussite-(Ce)

Ilímaussit-(Ce)

Ba₂Na₄CeFe³⁺Nb₂Si₈O₂₈ • 5H₂O

hexagonal

Ilinskite

Ilinszkit

NaCu₅O₂(SeO₃)₂Cl₃

orthorhombic

Illite

Illit

K_0.6-0.85Al₂(Si, Al)₄O₁₀(OH)₂

monoclinic

Ilmajokite

Ilmajokit

(Na, Ce, Ba)₂TiSi₃O₅(OH)₁₀ • nH₂O

monoclinic

Ilmenite

Ilmenit

Fe²⁺TiO₃

trigonal

Ilmenorutile

Ilmenorutil

(Ti, Nb, Fe²⁺)O₂

tetragonal

Ilsemannite

Ilsemannit

Mo₃O₈ • nH₂O (?)

amorphous

Iltisite

Iltisit

HgSAg(Cl, Br)

hexagonal

Ilvaite

Ilvait

CaFe²⁺₂Fe³⁺OSi₂O₇(OH)

orthorhombic, monoclinic

Imandrite

Imandrit

Na₁₂Ca₃Fe³⁺₂Si₁₂O₃₆

orthorhombic

Imgreite

Imgreit

NiTe (?)

hexagonal

Imhofite

Imhofit

Tl₆CuAs₁₆S₄₀

monoclinic

Imiterite

Imiterit

Ag₂HgS₂

monoclinic

Imogolite

Imogolit

Al₂SiO₃(OH)₄

?

Inaglyite

Inagliit

PbCu₃(Ir, Pt)₈S₁₆

hexagonal

Incaite

Inkait

(Pb, Ag)₄Sn₄FeSb₂S₁₅

monoclinic or triclinic

Inderborite

Inderborit

CaMg[B₃O₃(OH)₅]₂ • 6H₂O

monoclinic

Inderite

Inderit

MgB₃O₃(OH)₅ • 5H₂O

monoclinic

Indialite

Indialit

(Mg, Fe²⁺)₂Al₄Si₅O₁₈

hexagonal

Indigirite

Indigirit

Mg₂Al₂(CO₃)₄(OH)₂ • 15H₂O

monoclinic (?)

Indite

Indit

Fe²⁺In₂S₄

cubic

Indium

Indium

In

tetragonal

Inesite

Inezit

Ca₂Mn²⁺₇Si₁₀O₂₈(OH)₂ • 5H₂O

triclinic

Ingersonite

Ingersonit

Ca₃Mn²⁺Sb⁵⁺₄O₁₄

trigonal

Ingodite

Ingodit

Bi₂TeS

trigonal

Innelite

Innelit

Na₂CaBa₄Ti₃O₄(Si₂O₇)₂(SO₄)₂

triclinic

Insizwaite

Insizwait

Pt(Bi, Sb)₂

cubic

Intersilite

Interszilit

Na₆Mn²⁺TiSi₁₀O₂₄(OH)(OH)₃ • 4H₂O

monoclinic

Inyoite

Inyoit

Ca₂B₆O₆(OH)₁₀ • 8H₂O

monoclinic

Iodargyrite

Jódargirit

AgI

hexagonal

Iowaite

Iowait

Mg₆Fe³⁺₂(OH)₁₆Cl₂ • 4H₂O

trigonal

Iquiqueite

Iquiqueit

K₃Na₄Mg(Cr⁶⁺O₄)B₂₄O₃₉(OH) • 12H₂O

hexagonal

Iranite

Iranit

Pb₁₀Cu(CrO₄)₆(SiO₄)₂(F, OH)₂

triclinic

Iraqite-(La)

Irakit-(La)

K(La, Ce, Th)₂(Ca, Na)₄(Si, Al)₁₆O₄₀

tetragonal

Irarsite

Irarzit

(Ir, Ru, Rh, Pt)AsS

cubic

Irhtemite

Irhtemit

Ca₄Mg(AsO₄)₂(HAsO₃OH)₂ • 4H₂O

monoclinic

Iridarsenite

Iridarzenit

(Ir, Ru)As₂

monoclinic

Iridium

Irídium

Ir

cubic

Iridosmine

Iridozmin

(Os, Ir)

hexagonal

Iriginite

Iriginit

(UO₂)(Mo⁶⁺₂O₇) • 3H₂O

orthorhombic

Iron

Vas

Fe

cubic

Irtyshite

Irtisit

Na₂(Ta, Nb)₄O₁₁

hexagonal

Ishikawaite

Ishikawait

(U, Fe, Y, Ca)(Nb, Ta)O₄ (?)

orthorhombic

Isocubanite

Izokubanit

CuFe₂S₃

cubic

Isoferroplatinum

Izoferroplatina

(Pt, Pd)₃(Fe, Cu)

cubic

Isokite

Isokit

CaMg(PO₄)F

monoclinic

Isolueshite

Izolueshit

(Na, La, Ca)(Nb, Ti)O₃

cubic

Isomertieite

Izomertieit

Pd₁₁Sb₂As₂

cubic

Itoigawaite

Itoigawait

SrAl₂Si₂O₇(OH)₂ • H₂O

orthorhombic

Itoite

Itoit

Pb₃Ge⁴⁺(SO₄)₂O₂(OH)₂

orthorhombic

Iwakiite

Iwakiit

Mn²⁺(Fe³⁺, Mn³⁺)₂O₄

tetragonal

Iwashiroite-(Y)

Iwashiroit-(Y)

YTaO₄

monoclinic

Ixiolite

Ixiolit

(Ta, Nb, Sn, Fe, Mn)O₂

monoclinic

Izoklakeite

Izoklakeit

Pb₂₇(Cu, Fe)₂(Sb, Bi)₁₉S₅₇

orthorhombic