Tacharanite

Tacharanit

Ca₁₂Al₂Si₁₈O₅₁ • 18H₂O

monoclinic

Tachyhydrite

Tachihidrit

CaMg₂Cl₆ • 12H₂O

trigonal

Tadzhikite-(Y)

Tadzsikit-(Y)

Ca₃(Y, Ce)₂(Ti, Al, Fe³⁺)B₄Si₄O₂₂

monoclinic

Taenite

Ténit

(Ni, Fe)

cubic

Taikanite

Tajkanit

BaSr₂Mn³⁺₂O₂Si₄O₁₂

monoclinic

Taimyrite

Tajmirit

(Pd, Cu, Pt)₃Sn

orthorhombic

Tainiolite

Teniolit

KLiMg₂Si₄O₁₀F₂

monoclinic

Takanelite

Takanelit

(Mn²⁺, Ca)Mn⁴⁺₄O₉ • H₂O

hexagonal

Takedaite

Takedait

Ca₃B₂O₆

trigonal

Takéuchiite

Takéuchiit

(Mg, Mn²⁺)₂(Mn³⁺, Fe³⁺)BO₅

orthorhombic

Takovite

Takovit

Ni₆Al₂(CO₃, OH)(OH)₁₆ • 4H₂O

trigonal

Talc

Talk

Mg₃Si₄O₁₀(OH)₂

triclinic, monoclinic

Talmessite

Talmessit

Ca₂Mg(AsO₄)₂ • 2H₂O

triclinic

Talnakhite

Talnahit

Cu₉(Fe, Ni)₈S₁₆

cubic

Tamaite

Tamait

(Ca, K, Ba, Na)_3-4Mn₂₄(Si, Al)₄₀(O, OH)₁₁₂ • 21H₂O

monoclinic

Tamarugite

Tamarugit

NaAl(SO₄)₂ • 6H₂O

monoclinic

Tancoite

Tancoit

HNa₂LiAl(PO₄)₂(OH)

orthorhombic

Taneyamalite

Taneyamalit

Na(Mn²⁺, Mg, Fe²⁺)₁₂Si₁₂(O, OH)₄₄

triclinic

Tangeite

Tangeit

CaCu(VO₄)(OH)

orthorhombic

Tantalaeschynite-(Y)

Tantáleszkinit-(Y)

(Y, Ce, Ca)(Ta, Ti, Nb)₂O₆

orthorhombic

Tantalcarbide

Tantálkarbid

(Ta, Nb)C

cubic

Tanteuxenite-(Y)

Tanteuxenit-(Y)

(Y, Ce, Ca)(Ta, Nb, Ti)₂(O, OH)₆

orthorhombic

Tantite

Tantit

Ta₂O₅

triclinic

Taramellite

Taramellit

Ba₄(Fe³⁺, Ti, Fe²⁺, Mg)₄(B₂Si₈O₂₇)O₂ Cl_x

orthorhombic

Taramite

Taramit

Na[NaCa][(Fe²⁺, Mg)₃Al₂](Si₆Al₂)O₂₂ (OH)₂

monoclinic

Taranakite

Taranakit

(K, Na)₃(Al, Fe³⁺)₅(PO₄)₂(PO₃OH)₆ • 18H₂O

trigonal

Tarapacáite

Tarapacáit

K₂CrO₄

orthorhombic

Tarbuttite

Tarbuttit

Zn₂(PO₄)(OH)

triclinic

Tarkianite

Tarkianit

(Cu, Fe)(Re, Mo)₄S₈

cubic

Taseqite

Taseqit

Na₁₂Sr₃Ca₆Fe₃Zr₃NbSi₂₅O₇₃(O, OH, H₂O)₃Cl₂

trigonal

Tatarskite

Tatarszkit

Ca₆Mg₂(SO₄)₂(CO₃)₂Cl₄(OH)₄ • 7H₂O

orthorhombic

Tatyanaite

Tatyanait

(Pt, Pd)₉Cu₃Sn₄

orthorhombic

Tausonite

Tauszonit

SrTiO₃

cubic

Tavorite

Tavorit

LiFe³⁺(PO₄)(OH)

triclinic

Tazheranite

Tazseranit

(Zr, Ti, Ca)O₂

cubic

Teallite

Teallit

PbSnS₂

orthorhombic

Tedhadleyite

Tedhadleyit

Hg²⁺Hg⁺₁₀O₄I₂(Cl, Br)₂

triclinic

Teepleite

Teepleit

Na₂B(OH)₄Cl

tetragonal

Tegengrenite

Tegengrenit

(Mg, Mn)₂Sb⁵⁺_0.5(Mn³⁺, Si, Ti)_0.5O₄

trigonal

Teineite

Teineit

Cu²⁺Te⁴⁺O₃ • 2H₂O

orthorhombic

Telargpalite

Telargpalit

(Pd, Ag)₃Te (?)

cubic

Tellurantimony

Tellúrantimon

Sb₂Te₃

trigonal

Tellurite

Tellurit

TeO₂

orthorhombic

Tellurium

Tellúr

Te

trigonal

Tellurobismuthite

Tellurobizmutit

Bi₂Te₃

trigonal

Tellurohauchecornite

Tellurohauchecornit

Ni₉BiTeS₈

tetragonal

Telluronevskite

Telluronyevszkit

Bi₃TeSe₂

trigonal

Telluropalladinite

Telluropalladinit

Pd₉Te₄

monoclinic

Telyushenkoite

Tyeljusenkoit

CsNa₆Be₂(Si, Al, Zn)₁₈O₃₉F₂

trigonal

Temagamite

Temagamit

Pd₃HgTe₃

orthorhombic

Tengchongite

Tengchongit

CaU⁶⁺₆Mo⁶⁺₂O₂₅ • 12H₂O

orthorhombic

Tengerite-(Y)

Tengerit-(Y)

Y₂(CO₃)₃ • 2-3H₂O

orthorhombic

Tennantite

Tennantit

(Cu, Ag, Zn, Fe)₁₂(As, Sb)₄S₁₃

cubic

Tenorite

Tenorit

CuO

monoclinic

Tephroite

Tefroit

Mn²⁺₂SiO₄

orthorhombic

Terlinguacreekite

Terlinguacreekit

Hg₃O₂Cl₂

orthorhombic

Terlinguaite

Terlinguait

Hg₂OCl

monoclinic

Ternesite

Ternesit

Ca₅(SiO₄)₂SO₄

orthorhombic

Ternovite

Ternovit

(Mg, Ca)Nb₄O₁₁ • nH₂O (n » 10)

monoclinic

Terranovaite

Terranovait

NaCaAl₃Si₁₇O₄₀ • >7H₂O

orthorhombic

Terskite

Terskit

Na₄ZrSi₆O₁₅(OH)₂ • H₂O

orthorhombic

Tertschite

Tertschit

Ca₄B₁₀O₁₉ • 20H₂O

monoclinic (?)

Teruggite

Teruggit

Ca₄MgAs₂B₁₂O₂₂(OH)₁₂ • 12H₂O

monoclinic

Teschemacherite

Teschemacherit

(NH₄)HCO₃

orthorhombic

Testibiopalladite

Tesztibiopalladit

Pd(Sb, Bi)Te

cubic

Tetra-auricupride

Tetraaurikuprid

AuCu

tetragonal

Tetradymite

Tetradimit

Bi₂Te₂S

trigonal

Tetra-ferri-annite

Tetraferriannit

KFe²⁺₃(Si₃Fe³⁺)O₁₀(OH)₂

monoclinic

Tetra-ferriphlogopite

Tetraferriflogopit

KMg₃(Si₃Fe³⁺)O₁₀(OH)₂

monoclinic

Tetraferroplatinum

Tetraferroplatina

PtFe

tetragonal

Tetrahedrite

Tetraedrit

(Cu, Fe)₁₂Sb₄S₁₃

cubic

Tetrarooseveltite

Tetrarooseveltit

b-Bi(AsO₄)

tetragonal

Tetrataenite

Tetraténit

FeNi

tetragonal

Tetrawickmanite

Tetrawickmanit

Mn²⁺Sn⁴⁺(OH)₆

tetragonal

Thadeuite

Thadeuit

(Ca, Mn²⁺)(Mg, Fe²⁺, Mn²⁺)₃(PO₄)₂ (OH, F)₂

orthorhombic

Thalcusite

Talkuszit

Tl₂(Cu, Fe)₄S₄

tetragonal

Thalénite-(Y)

Thalénit-(Y)

Y₃Si₃O₁₀(F, OH)

monoclinic

Thalfenisite

Talfeniszit

Tl₆(Fe, Ni, Cu)₂₅S₂₆Cl

cubic

Thaumasite

Taumazit

Ca₃Si(SO₄)(CO₃)(OH)₆ • 12H₂O

hexagonal

Theisite

Theisit

Cu₅Zn₅(AsO₄, SbO₄)₂(OH)₁₄

orthorhombic (?)

Thénardite

Thénardit

Na₂SO₄

orthorhombic

Theoparacelsite

Theoparacelsite

Cu₃(OH)₂As₂O₇

orthorhombic

Theophrastite

Theophrasztit

Ni(OH)₂

trigonal

Thérèsmagnanite

Thérèsmagnanit

(Co, Zn, Ni)₆(SO₄)(OH, Cl)₁₀ • 8H₂O

hexagonal

Thermonatrite

Termonátrit

Na₂CO₃ • H₂O

orthorhombic

Thometzekite

Thometzekit

Pb(Cu, Zn)₂(AsO₄)₂(OH, H₂O)₂

monoclinic or triclinic

Thomsenolite

Thomsenolit

NaCaAlF₆ • H₂O

monoclinic

Thomsonite-Ca

Thomsonit-Ca

NaCa₂Al₅Si₅O₂₀ • 6H₂O

orthorhombic

Thomsonite-Sr

Thomsonit-Sr

(Sr, Ca)₂NaAl₅Si₅O₂₀ • 6-7H₂O

orthorhombic

Thorbastnäsite

Torbastnäsit

Th(Ca, Ce)(CO₃)₂F₂ • 3H₂O

hexagonal

Thoreaulite

Thoreaulit

Sn²⁺(Ta, Nb)₂O₆

monoclinic

Thorianite

Torianit

ThO₂

cubic

Thorikosite

Thorikoszit

Pb₃(Sb³⁺, As³⁺)O₃(OH)Cl₂

tetragonal

Thorite

Torit

(Th, U)SiO₄

tetragonal

Thornasite

Tornaszit

(Na, K)ThSi₁₁(O, F, OH)₂₅ • 8H₂O

trigonal

Thorogummite

Torogummit

(Th, U⁶⁺)(SiO₄)_1-x(OH)_4x

tetragonal

Thorosteenstrupine

Torosteenstrupin

CaMnThSi₄O₁₁(OH)F • 6H₂O

amorphous

Thortveitite

Thortveitit

(Sc, Y)₂Si₂O₇

monoclinic

Thorutite

Torutit

(Th, U, Ca)Ti₂(O, OH)₆

monoclinic

Threadgoldite

Threadgoldit

Al(UO₂)₂(PO₄)₂(OH) • 8H₂O

monoclinic

Tiemannite

Tiemannit

HgSe

cubic

Tienshanite

Tienshanit

Na₂BaMn²⁺TiB₂Si₆O₂₀

hexagonal

Tiettaite

Tiettait

(Na, K)₁₇Fe³⁺TiSi₁₆O₂₉(OH)₃₀ • 2H₂O

orthorhombic

Tikhonenkovite

Tyihonyenkovit

SrAlF₄(OH) • H₂O

monoclinic

Tilasite

Tilasit

CaMg(AsO₄)F

monoclinic

Tilleyite

Tilleyit

Ca₅Si₂O₇(CO₃)₂

monoclinic

Tillmannsite

Tillmannsit

(Ag₃Hg)(V, As)O₄

tetragonal

Tin

Ón

Sn

tetragonal

Tinaksite

Tinakszit

K₂Na(Ca, Mn²⁺)₂TiSi₇O₁₉(OH)

triclinic

Tincalconite

Tinkalkonit

Na₂B₄O₅(OH)₄ • 3H₂O

trigonal

Tinsleyite

Tinsleyit

KAl₂(PO₄)₂(OH) • 2H₂O

monoclinic

Tinticite

Tinticit

Fe³⁺₄(PO₄)₃(OH)₃ • 5H₂O

monoclinic

Tintinaite

Tintinait

Pb₂₂Cu⁺₄(Sb, Bi)₃₀S₆₉

orthorhombic

Tinzenite

Tinzenit

(Ca, Mn²⁺, Fe²⁺)₃Al₂BSi₄O₁₅(OH)

triclinic

Tiptopite

Tiptopit

K₂(Li, Na, Ca)₆Be₆(PO₄)₆(OH)₂ • H₂O

hexagonal

Tiragalloite

Tiragalloit

Mn²⁺₄As⁵⁺Si₃O₁₂(OH)

monoclinic

Tischendorfite

Tischendorfit

Pd₈Hg₃Se₉

orthorhombic

Tisinalite

Tiszinalit

Na₃H₃(Mn²⁺, Ca, Fe)TiSi₆(O, OH)₁₈ • 2H₂O

trigonal

Titanite

Titanit

CaTiSiO₅

monoclinic

Titanowodginite

Titanowodginit

Mn²⁺TiTa₂O₈

monoclinic

Titantaramellite

Titántaramellit

Ba₄(Ti, Fe³⁺, Fe²⁺, Mg)₄(B₂Si₈O₂₇)O₂ Cl_x

orthorhombic

Tivanite

Tivanit

V³⁺TiO₃(OH)

monoclinic

Tlalocite

Tlalocit

(Cu²⁺, Zn)₁₆(Te⁴⁺O₃)(Te⁶⁺O₄)₂Cl(OH)₂₅ • 27H₂O

orthorhombic

Tlapallite

Tlapallit

H₆(Ca, Pb)₂(Cu²⁺, Zn)₃(SO₄)(Te⁴⁺O₃)₄ (Te⁶⁺O₆)

monoclinic

Tobelite

Tobelit

(NH₄, K)Al₂(Si₃Al)O₁₀(OH)₂

monoclinic

Tobermorite

Tobermorit

Ca₅Si₆(O, OH)₁₈ • 5H₂O

orthorhombic

Tochilinite

Tochilinit

6Fe_0.9S • 5(Mg, Fe²⁺)(OH)₂

monoclinic

Tocornalite

Tocornalit

Ag_xHg_yI_z

?

Todorokite

Todorokit

(Mn²⁺, Ca, Na, K)(Mn⁴⁺, Mn²⁺, Mg)₆O₁₂ • 3H₂O

monoclinic

Tokkoite

Tokkoit

K₂Ca₄Si₇O₁₇(O, OH, F)₄

triclinic

Tokyoite

Tokióit

Ba₂Mn³⁺(VO₄)₂(OH)

monoclinic

Tolbachite

Tolbacsit

CuCl₂

monoclinic

Tolovkite

Tolovkit

IrSbS

cubic

Tombarthite-(Y)

Tombarthit-(Y)

Y₄(Si, H₄)₄O_12-x(OH)_4+2x

monoclinic

Tomichite

Tomichit

(V³⁺, Fe³⁺)₄Ti₃As³⁺O₁₃(OH)

monoclinic

Tongbaite

Tongbait

Cr₃C₂

orthorhombic

Tooeleite

Tooeleit

Fe³⁺₈(AsO₄, SO₄)₆(OH)₆ • 5H₂O

orthorhombic

Topaz

Topáz

Al₂SiO₄(F, OH)₂

orthorhombic

Torbernite

Torbernit

Cu(UO₂)₂(PO₄)₂ • 8-12H₂O

tetragonal

Törnebohmite-(Ce)

Törnebohmit-(Ce)

(Ce, La)₂Al(SiO₄)₂(OH)

monoclinic

Törnebohmite-(La)

Törnebohmit-(La)

(La, Ce)₂Al(SiO₄)₂(OH)

monoclinic

Torreyite

Torreyit

(Mg, Mn²⁺)₉Zn₄(SO₄)₂(OH)₂₂ • 8H₂O

monoclinic

Tosudite

Tosudit

(Mg, Fe²⁺)₅Al(Si₃Al)O₁₀(OH)₈ • (Ca_0.5, Na)_0.33 (Al, Fe, Mg)_2-3(Al, Si)₄O₁₀(OH)₂ • nH₂O

monoclinic

Tounkite

Tounkit

(Na, Ca, K)₈Si₆Al₆O₂₄(SO₄)₂Cl • H₂O

hexagonal

Toyohaite

Toyohait

Ag₂FeSn₃S₈

tetragonal

Trabzonite

Trabzonit

Ca₄Si₃O₁₀ • 2H₂O

monoclinic

Tranquillityite

Tranquillityit

Fe²⁺₈(Zr, Y)₂Ti₃Si₃O₂₄

hexagonal

Traskite

Traskit

Ba₉Fe²⁺₂Ti₂(SiO₃)₁₂(OH, Cl, F)₆ • 6H₂O

hexagonal

Trattnerite

Trattnerit

(Fe, Mg)₂(Mg, Fe)₃Si₁₂O₃₀

hexagonal

Treasurite

Treasurit

Ag₇Pb₆Bi₁₅S₃₂

monoclinic

Trechmannite

Trechmannit

AgAsS₂

trigonal

Trembathite

Trembathit

(Mg, Fe²⁺)₃B₇O₁₃Cl

trigonal

Tremolite

Tremolit

Ca₂(Mg, Fe²⁺)₅Si₈O₂₂(OH)₂

monoclinic

Trevorite

Trevorit

NiFe³⁺₂O₄

cubic

Triangulite

Triangulit

Al₃(UO₂)₄(PO₄)₄(OH)₅ • 5H₂O

triclinic

Tridymite

Tridimit

SiO₂

orthorhombic, triclinic

Trigonite

Trigonit

Pb₃Mn²⁺(As³⁺O₃)₂(As³⁺O₂OH)

monoclinic

Trikalsilite

Trikalszilit

(K, Na)AlSiO₄

hexagonal

Trilithionite

Trilitionit

KLi_1.5Al_1.5(Si₃Al)O₁₀F₂

monoclinic

Trimerite

Trimerit

CaMn²⁺₂Be₃(SiO₄)₃

monoclinic

Trimounsite-(Y)

Trimounsit-(Y)

Y₂Ti₂SiO₉

monoclinic

Triphylite

Trifilin

Li(Fe²⁺, Mn²⁺)PO₄

orthorhombic

Triplite

Triplit

(Mn²⁺, Fe²⁺, Mg, Ca)₂(PO₄)(F, OH)

monoclinic

Triploidite

Triploidit

(Mn²⁺, Fe²⁺)₂(PO₄)(OH)

monoclinic

Trippkeite

Trippkeit

CuAs³⁺₂O₄

tetragonal

Tripuhyite

Tripuhyit

Fe²⁺Sb⁵⁺₂O₆

tetragonal

Tristramite

Tristramit

(Ca, U⁴⁺, Fe³⁺)(PO₄, SO₄) • 2H₂O

hexagonal

Tritomite-(Ce)

Tritomit-(Ce)

(Ce, La, Ca, Y, Th)₅(Si, B)₃(O, OH, F)₁₃ (?)

trigonal

Tritomite-(Y)

Tritomit-(Y)

(Y, Ca, La, Fe²⁺)₅(Si, B, Al)₃(O, OH, F)₁₃ (?)

trigonal

Trögerite

Trögerit

(UO₂)₃(AsO₄)₂ • 12H₂O (?)

tetragonal, monoclinic

Trogtalite

Trogtalit

CoSe₂

cubic

Troilite

Troilit

FeS

hexagonal

Trolleite

Trolleit

Al₄(PO₄)₃(OH)₃

monoclinic

Trona

Trona

Na₃(CO₃)(HCO₃) • 2H₂O

monoclinic

Truscottite

Truscottit

(Ca, Mn²⁺)₁₄Si₂₄O₅₈(OH)₈ • 2H₂O

trigonal

Trüstedtite

Trüstedtit

(Ni, Co)₃Se₄

cubic

Tsaregorodtsevite

Caregorodcevit

N(CH₃)₄[Si₂(Si_0.5Al_0.5)O₆]₂

orthorhombic

Tschermakite

Tschermakit

Ca₂[(Mg, Fe²⁺)₃Al₂](Si₆Al₂)O₂₂(OH)₂

monoclinic

Tschermigite

Tschermigit

(NH₄)Al(SO₄)₂ • 12H₂O

cubic

Tschernichite

Tschernichit

CaAl₂Si₆O₁₆ • 8H₂O

tetragonal

Tschörtnerite

Tschörtnerit

Ca₄(K, Ca, Sr, Ba)₃Cu₃(OH)₈[Al₁₂Si₁₂ O₄₈] • nH₂O (n » 20)

cubic

Tsepinite-Ca

Cepinit-Ca

(Ca, K, Na, o)₂(Ti, Nb)₂(Si₄O₁₂)(OH, O)₂ • 4H₂O

monoclinic

Tsepinite-K

Cepinit-K

(K, Ba, Na)₂(Ti, Nb)₂(Si₄O₁₂)(OH, O)₂ • 3H₂O

monoclinic

Tsepinite-Na

Cepinit-Na

(Na, H₃O, K, Sr, Ba)_12-xTi₈(Si₄O₁₂)₄ (OH, O)₈ • nH₂O

monoclinic

Tsnigriite

Tsnigriit

Ag₉SbTe₃(S, Se)₃

monoclinic

Tsumcorite

Tsumcorit

Pb(Zn, Fe³⁺)₂(AsO₄)₂(OH, H₂O)₂

monoclinic

Tsumebite

Tsumebit

Pb₂Cu(PO₄)(SO₄)(OH)

monoclinic

Tsumgallite

Tsumgallit

GaO(OH)

orthorhombic

Tsumoite

Tsumoit

BiTe

trigonal

Tučekite

Tučekit

Ni₉Sb₂S₈

tetragonal

Tugarinovite

Tugarinovit

Mo⁴⁺O₂

monoclinic

Tugtupite

Tugtupit

Na₄AlBeSi₄O₁₂Cl

tetragonal

Tuhualite

Tuhualit

(Na, K)Fe²⁺Fe³⁺Si₆O₁₅

orthorhombic

Tuite

Tuit

Ca₃(PO₄)₂

trigonal

Tulameenite

Tulameenit

Pt₂FeCu

tetragonal

Tuliokite

Tuliokit

BaNa₆Th(CO₃)₆ • 6H₂O

trigonal

Tumchaite

Tumcsait

Na₂(Zr, Sn)Si₄O₁₁ • 2H₂O

monoclinic

Tundrite-(Ce)

Tundrit-(Ce)

Na₃(Ce, La)₄(Ti, Nb)₂(SiO₄)₂(CO₃)₃O₄ (OH) • 2H₂O

triclinic

Tundrite-(Nd)

Tundrit-(Nd)

Na₃(Nd, La)₄(Ti, Nb)₂(SiO₄)₂(CO₃)₃O₄ (OH) • 2H₂O

triclinic

Tunellite

Tunellit

SrB₆O₉(OH)₂ • 3H₂O

monoclinic

Tungstenite

Tungsztenit

WS₂

hexagonal or trigonal

Tungstibite

Tungsztibit

Sb₂WO₆

orthorhombic

Tungstite

Tungsztit

WO₃ • H₂O

orthorhombic

Tungusite

Tunguzit

Ca₄Fe²⁺₂Si₆O₁₅(OH)₆

?

Tunisite

Tuniszit

NaCa₂Al₄(CO₃)₄(OH)₈Cl

tetragonal

Tuperssuatsiaite

Tuperssuatsiait

Na(Fe³⁺, Mn²⁺)₃Si₈O₂₀(OH)₂ • 4H₂O

monoclinic

Turanite

Turanit

Cu₅(VO₄)₂(OH)₄ (?)

orthorhombic (?)

Turkestanite

Turkesztánit

Th(Ca, Na)₂(K_1-xo_x)Si₈O₂₀ • nH₂O

tetragonal

Turneaureite

Turneaureit

Ca₅(AsO₄, PO₄)₃Cl

hexagonal

Turquoise

Türkiz

CuAl₆(PO₄)₄(OH)₈ • 4H₂O

triclinic

Turtmannite

Turtmannit

(Mn, Mg)_22.5Mg_3-3x[(V, As)O₄]₃(SiO₄)₃ (AsO₃)_xO_5-5x(OH)_20+x

trigonal

Tuscanite

Toszkanit

K(Ca, Na)₆(Si, Al)₁₀O₂₂(SO₄, CO₃)₂ (OH) • H₂O

monoclinic

Tusionite

Tuszionit

Mn²⁺Sn⁴⁺(BO₃)₂

trigonal

Tuzlaite

Tuzlait

NaCaB₅O₈(OH)₂ • 3H₂O

monoclinic

Tvalchrelidzeite

Tvalcsrelidzeit

Hg₁₂(Sb, As)₈S₁₅

monoclinic

Tvedalite

Tvedalit

(Ca, Mn²⁺)₄Be₃Si₆O₁₇(OH)₄ • 3H₂O

orthorhombic

Tveitite-(Y)

Tveitit-(Y)

Ca₁₄Y₅F₄₃

trigonal

Tweddillite

Tweddillit

CaSr(Mn³⁺, Fe³⁺)₂AlSi₃O₁₂(OH)

monoclinic

Twinnite

Twinnit

Pb(Sb, As)₂S₄

triclinic (?)

Tychite

Tichit

Na₆Mg₂(CO₃)₄(SO₄)

cubic

Tyretskite

Tiretszkit

Ca₂B₅O₉(OH) • H₂O

triclinic

Tyrolite

Tirolit

CaCu₅(AsO₄)₂(CO₃)(OH)₄ • 6H₂O

orthorhombic

Tyrrellite

Tyrrellit

(Cu, Co, Ni)₃Se₄

cubic

Tyuyamunite

Tyujamunit

Ca(UO₂)₂(V₂O₈) • 5-8H₂O

orthorhombic