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Oxides & Hydroxide
minerals
Metal + oxygen or hydroxyl (OH).
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782
minerals · Oxides & Hydroxide minerals
Hematite
Fe₂O₃
Oxides & Hydroxide
Hexagonal
Mohs 5–6
Magnetite
Fe²⁺Fe³⁺₂O₄
Oxides & Hydroxide
Cubic
Mohs 5.5–6.5
Variety
Ruby
Al₂O₃
Oxides & Hydroxide
Trigonal
Mohs 9
Variety
Sapphire
Al₂O₃
Oxides & Hydroxide
Trigonal
Mohs 9
A
Achalaite
Fe²⁺TiNb₂O₈
Oxides & Hydroxide
Monoclinic
Mohs 5.5
A
Addibischoffite
Ca₂Al₆Al₆O₂₀
Oxides & Hydroxide
Triclinic
A
Aeschynite-(Ce)
(Ce,Ca,Fe,Th)(Ti,Nb)₂(O,OH)₆
Oxides & Hydroxide
Orthorhombic
Mohs 5–6
A
Aeschynite-(Nd)
(Nd,Ln,Ca)(Ti,Nb)₂(O,OH)₆
Oxides & Hydroxide
Orthorhombic
Mohs 5–6
Aeschynite-(Y)
(Y,Ln,Ca,Th)(Ti,Nb)₂(O,OH)₆
Oxides & Hydroxide
Orthorhombic
Mohs 5–6
Agrinierite
K₂Ca[(UO₂)₃O₃(OH)₂]₂·5H₂O
Oxides & Hydroxide
Orthorhombic
Ahlfeldite
Ni(SeO₃)·2H₂O
Oxides & Hydroxide
Monoclinic
Mohs 2–2.5
A
Akaogiite
TiO₂
Oxides & Hydroxide
Monoclinic
Akdalaite
Al₁₀O₁₄(OH)₂
Oxides & Hydroxide
Hexagonal
Mohs 7–7.5
Akhtenskite
MnO₂
Oxides & Hydroxide
Hexagonal
Variety
Alexandrite
BeAl₂O₄
Oxides & Hydroxide
Orthorhombic
Mohs 8.5
Alfredopetrovite
Al₂(Se⁴⁺O₃)₃·6H₂O
Oxides & Hydroxide
Hexagonal
Mohs 2.5
A
Allendeite
Sc₄Zr₃O₁₂
Oxides & Hydroxide
Hexagonal
Almeidaite
PbZn₂(Mn,Y)(Ti,Fe³⁺)₁₈O₃₆(OH,O)₂
Oxides & Hydroxide
Hexagonal
Mohs 6
Alumotantite
AlTaO₄
Oxides & Hydroxide
Orthorhombic
Alvanite
Zn²⁺Al₄(V⁵⁺O₃)₂(OH)₁₂·2H₂O
Oxides & Hydroxide
Monoclinic
Mohs 3–3.5
Amakinite
Fe(OH)₂
Oxides & Hydroxide
Hexagonal
Mohs 3.5–4
Ambrinoite
[K,(NH₄)]₂(As,Sb)₆(Sb,As)₂S₁₃·H₂O
Oxides & Hydroxide
Triclinic
Mohs 2
Ameghinite
NaB₃O₃(OH)₄
Oxides & Hydroxide
Monoclinic
Mohs 2.5
Amgaite
Tl³⁺₂Te⁶⁺O₆
Oxides & Hydroxide
Hexagonal
A
Ammonioborite
(NH₄)₃B₁₅O₂₀(OH)₈·4H₂O
Oxides & Hydroxide
Monoclinic
A
Ammoniolasalite
[(NH₄)₂Mg₂(H₂O)₂₀]·[V₁₀O₂₈]
Oxides & Hydroxide
Monoclinic
Mohs 1
Anatase
TiO₂
Oxides & Hydroxide
Tetragonal
Mohs 5.5–6
Andychristyite
PbCu²⁺Te⁶⁺O₅(H₂O)
Oxides & Hydroxide
Triclinic
Mohs 2–3
A
Andymcdonaldite
Fe₂TeO₆
Oxides & Hydroxide
Tetragonal
Ankinovichite
NiAl₄(V⁵⁺O₃)₂(OH)₁₂·2H₂O
Oxides & Hydroxide
Monoclinic
Mohs 2.5–3
Ansermetite
Mn²⁺V⁵⁺₂O₆·4H₂O
Oxides & Hydroxide
Monoclinic
Anthonyite
Cu(OH)₂·3H₂O
Oxides & Hydroxide
Mohs 2
A
Anzaite-(Ce)
Ce₄Fe²⁺Ti₆O₁₈(OH)₂
Oxides & Hydroxide
Monoclinic
Apuanite
(Fe²⁺Fe³⁺₂)(Fe³⁺₂Sb³⁺₄)O₁₂S
Oxides & Hydroxide
Tetragonal
A
Arakiite
ZnMn²⁺₁₂Fe³⁺₂(As³⁺O₃)(As⁵⁺O₄)₂(OH)₂₃
Oxides & Hydroxide
Monoclinic
Mohs 3–4
A
Argutite
GeO₂
Oxides & Hydroxide
Tetragonal
Mohs 6–7
Armalcolite
(Mg,Fe²⁺)Ti₂O₅
Oxides & Hydroxide
Orthorhombic
Mohs 5
Asbolane
Mn⁴⁺(O,OH)₂·(Co,Ni,Mg,Ca)ₓ(OH)₂ₓ·nH₂O
Oxides & Hydroxide
Hexagonal
A
Ashoverite
Zn(OH)₂
Oxides & Hydroxide
Tetragonal
A
Aspedamite
₁₂(Fe³⁺,Fe²⁺)₃Nb₄[Th(Nb,Fe³⁺)₁₂O₄₂][(H₂O),(OH)]₁₂
Oxides & Hydroxide
Cubic
Mohs 3–4
Aurorite
Mn²⁺Mn⁴⁺₃O₇·3H₂O
Oxides & Hydroxide
Hexagonal
Mohs 3
Avicennite
Tl₂O₃
Oxides & Hydroxide
Cubic
Mohs 1.5–2.5
Baddeleyite
ZrO₂
Oxides & Hydroxide
Monoclinic
Mohs 6.5
B
Bahariyaite
KMnO₄
Oxides & Hydroxide
Orthorhombic
Bahianite
Al₅Sb⁵⁺₃O₁₄(OH)₂
Oxides & Hydroxide
Monoclinic
Mohs 9
Balyakinite
Cu²⁺(Te⁴⁺O₃)
Oxides & Hydroxide
Orthorhombic
Bannermanite
(Na,K)ₓV⁴⁺ₓV⁵⁺₆₋ₓO₁₅ (0.5<x<0.9)
Oxides & Hydroxide
Monoclinic
Bariandite
Al₀.₆(V⁵⁺,V⁴⁺)₈O₂₀·9H₂O
Oxides & Hydroxide
Monoclinic
B
Barioferrite
BaFe³⁺₁₂O₁₉
Oxides & Hydroxide
Hexagonal
B
Barioperovskite
BaTiO₃
Oxides & Hydroxide
Orthorhombic
Barnesite
Na₂V⁵⁺₆O₁₆·3H₂O
Oxides & Hydroxide
Monoclinic
Mohs 3
B
Bartelkeite
PbFe²⁺Ge(Ge₂O₇)(OH)₂·H₂O
Oxides & Hydroxide
Monoclinic
Mohs 4
B
Bassoite
SrV⁴⁺₃O₇·4H₂O
Oxides & Hydroxide
Monoclinic
Mohs 4–4.5
Batiferrite
BaTi₂Fe³⁺₈Fe²⁺₂O₁₉
Oxides & Hydroxide
Hexagonal
Mohs 6
B
Baumoite
Ba₀.₅[(UO₂)₃O₈Mo₂(OH)₃](H₂O)₃
Oxides & Hydroxide
Monoclinic
Mohs 2.5
Bauranoite
BaU₂O₇·4-5H₂O
Oxides & Hydroxide
Mohs 5
B
Bayerite
Al(OH)₃
Oxides & Hydroxide
Monoclinic
B
Beckettite
Ca₂V₆Al₆O₂₀
Oxides & Hydroxide
Triclinic
Becquerelite
Ca(UO₂)₆O₄(OH)₆·8H₂O
Oxides & Hydroxide
Orthorhombic
Mohs 2.5
Behoite
Be(OH)₂
Oxides & Hydroxide
Orthorhombic
Mohs 4
Belyankinite
Ca₁₋₂(Ti,Zr,Nb)₅O₁₂·9H₂O
Oxides & Hydroxide
Mohs 2–3
Berdesinskiite
V³⁺₂TiO₅
Oxides & Hydroxide
Monoclinic
Mohs 6–6.5
B
Bernalite
Fe(OH)₃
Oxides & Hydroxide
Orthorhombic
Mohs 4
Bernardevansite
Al₂(Se⁴⁺O₃)₃·6H₂O
Oxides & Hydroxide
Monoclinic
Betpakdalite-CaCa
[Ca₂(H₂O)₁₇Ca(H₂O)₆][Mo⁶⁺₈As⁵⁺₂Fe³⁺₃O₃₆(OH)]
Oxides & Hydroxide
Monoclinic
Mohs 3
B
Betpakdalite-CaMg
[Ca₂(H₂O)₁₇Mg(H₂O)₆][Mo⁶⁺₈As⁵⁺₂Fe³⁺₃O₃₆(OH)]
Oxides & Hydroxide
Monoclinic
Mohs 3.5
B
Betpakdalite-FeFe
[Fe³⁺₂(H₂O)₁₅(OH)₂Fe³⁺(H₂O)₆][Mo₈As₂Fe³⁺₃O₃₇]
Oxides & Hydroxide
Monoclinic
Betpakdalite-NaCa
[Na₂(H₂O)₁₇Ca(H₂O)₆][Mo⁶⁺₈As⁵⁺₂Fe³⁺₃O₃₄(OH)₃]
Oxides & Hydroxide
Monoclinic
B
Betpakdalite-NaNa
[Na₂(H₂O)₁₆Na(H₂O)₆][Mo⁶⁺₈As⁵⁺₂Fe³⁺₃O₃₃(OH)₄]
Oxides & Hydroxide
Monoclinic
Mohs 3
B
Bicapite
[KNa₂Mg₂(H₂O)₂₅][H₂PV⁵⁺₁₂O₄₀(V⁵⁺O)₂]
Oxides & Hydroxide
Tetragonal
Mohs 1.5
Billietite
Ba(UO₂)₆O₄(OH)₆·8H₂O
Oxides & Hydroxide
Orthorhombic
Bindheimite
Pb₂Sb⁵⁺₂O₇
Oxides & Hydroxide
Cubic
Mohs 4–4.5
Birnessite
(Na,Ca,K)₀.₆(Mn⁴⁺,Mn³⁺)₂O₄·1.5H₂O
Oxides & Hydroxide
Triclinic
Mohs 1.5
Bismite
Bi₂O₃
Oxides & Hydroxide
Monoclinic
Mohs 4.5
Bismutocolumbite
BiNbO₄
Oxides & Hydroxide
Orthorhombic
Mohs 5.5
B
Bismutostibiconite
(Bi,Fe³⁺, )₂Sb⁵⁺₂O₇
Oxides & Hydroxide
Cubic
Mohs 4–5
Bismutotantalite
BiTaO₄
Oxides & Hydroxide
Orthorhombic
Mohs 5–5.5
B
Bitikleite
Ca₃(SbSn)(AlO₄)₃
Oxides & Hydroxide
Cubic
Bixbyite-(Fe)
Fe³⁺₂O₃
Oxides & Hydroxide
Cubic
Mohs 6–6.5
B
Bixbyite-(Mn)
Mn³⁺₂O₃
Oxides & Hydroxide
Cubic
Mohs 3.75
Blakeite
Fe³⁺₂(Te⁴⁺O₃)₃
Oxides & Hydroxide
B
Blossite
Cu₂V⁵⁺₂O₇
Oxides & Hydroxide
Orthorhombic
B
Bluestreakite
K₄Mg₂(V⁴⁺₂V⁵⁺₈O₂₈)·14H₂O
Oxides & Hydroxide
Monoclinic
Mohs 2
B
Bobfinchite
Na[(UO₂)₈O₃(OH)₁₁]·10H₂O
Oxides & Hydroxide
Orthorhombic
Bokite
(Al,Fe)₁.₃(V⁵⁺,V⁴⁺,Fe³⁺)₈O₂₀·7.5H₂O
Oxides & Hydroxide
Monoclinic
Mohs 3
B
Borisenkoite
Cu₃[(V,As)O₄]₂
Oxides & Hydroxide
Monoclinic
Mohs 4.5
Bottinoite
NiSb⁵⁺₂(OH)₁₂·6H₂O
Oxides & Hydroxide
Hexagonal
Mohs 3
B
Botuobinskite
SrFe²⁺(Ti⁴⁺₁₂Cr³⁺₆)Mg₂[O₃₆(OH)₂]
Oxides & Hydroxide
Hexagonal
B
Bracewellite
CrO(OH)
Oxides & Hydroxide
Orthorhombic
Brandholzite
MgSb₂(OH)₁₂·6H₂O
Oxides & Hydroxide
Hexagonal
Mohs 2–3
Brannerite
UTi₂O₆
Oxides & Hydroxide
Monoclinic
Brizziite
NaSbO₃
Oxides & Hydroxide
Hexagonal
Bromellite
BeO
Oxides & Hydroxide
Hexagonal
Mohs 9
Brookite
TiO₂
Oxides & Hydroxide
Orthorhombic
Mohs 5.5–6
Brownmillerite
Ca₂Fe³⁺AlO₅
Oxides & Hydroxide
Orthorhombic
Brucite
Mg(OH)₂
Oxides & Hydroxide
Hexagonal
Mohs 2.5
B
Brumadoite
Cu₃(Te⁶⁺O₄)(OH)₄·5H₂O
Oxides & Hydroxide
Monoclinic
Brunogeierite
Fe²⁺₂Ge⁴⁺O₄
Oxides & Hydroxide
Cubic
Mohs 5
Bunsenite
NiO
Oxides & Hydroxide
Cubic
Mohs 5.5
B
Burroite
Ca₂(NH₄)₂(V₁₀O₂₈)·15H₂O
Oxides & Hydroxide
Triclinic
Mohs 1.5–2
Burtite
CaSn⁴⁺(OH)₆
Oxides & Hydroxide
Cubic
Mohs 3
B
Buserite
Na₄Mn₁₄O₂₇·21H₂O
Oxides & Hydroxide
B
Byrudite
(Be, )(V³⁺,Ti)₃O₆
Oxides & Hydroxide
Orthorhombic
Mohs 7
Byströmite
MgSb⁵⁺₂O₆
Oxides & Hydroxide
Tetragonal
Mohs 7
Böhmite
AlO(OH)
Oxides & Hydroxide
Orthorhombic
Mohs 3.5
Cafetite
CaTi₂O₅·H₂O
Oxides & Hydroxide
Monoclinic
Mohs 4–5
C
Calciosamarskite
(Ca,Fe,Y)(Nb,Ta,Ti)O₄
Oxides & Hydroxide
Monoclinic
Mohs 5–6
Calciotantite
CaTa₄O₁₁
Oxides & Hydroxide
Hexagonal
Calciouranoite
(Ca,Ba,Pb,K,Na)U₂O₇·5H₂O
Oxides & Hydroxide
Mohs 4
Calcioveatchite
SrCaB₁₁O₁₆(OH)₅·H₂O
Oxides & Hydroxide
Monoclinic
Calzirtite
Ca₂Zr₅Ti₂O₁₆
Oxides & Hydroxide
Tetragonal
Mohs 6–7
Carboirite
Fe²⁺Al₂GeO₅(OH)₂
Oxides & Hydroxide
Triclinic
Carlfriesite
CaTe⁴⁺₂Te⁶⁺O₈
Oxides & Hydroxide
Monoclinic
Mohs 3.5
Carlosbarbosaite
(UO₂)₂Nb₂O₆(OH)₂·2H₂O
Oxides & Hydroxide
Orthorhombic
Carmeltazite
ZrAl₂Ti₄O₁₁
Oxides & Hydroxide
Orthorhombic
C
Carmichaelite
(Ti,Cr,Fe)(O,OH)₂
Oxides & Hydroxide
Monoclinic
Mohs 2.5
C
Caseyite
[(V⁵⁺O₂)Al₇.₅(OH)₁₅(H₂O)₁₃]₂[H₂V⁴⁺V⁵⁺₉O₂₈][V⁵⁺₁₀O₂₈]₂·90H₂O
Oxides & Hydroxide
Monoclinic
Mohs 2–3
Cassiterite
SnO₂
Oxides & Hydroxide
Tetragonal
Mohs 6–7
Cerianite-(Ce)
CeO₂
Oxides & Hydroxide
Cubic
Cervantite
Sb³⁺Sb⁵⁺O₄
Oxides & Hydroxide
Orthorhombic
Mohs 4–5
Cesbronite
Cu₃Te⁶⁺O₄(OH)₄
Oxides & Hydroxide
Orthorhombic
Mohs 3
C
Cesiokenopyrochlore
Nb₂(O,OH)₆Cs₁₋ₓ
Oxides & Hydroxide
Cubic
Mohs 5
Cesplumtantite
Cs₂Pb₃Ta₈O₂₄
Oxides & Hydroxide
Tetragonal
Cesàrolite
PbMn⁴⁺₃O₆(OH)₂
Oxides & Hydroxide
Mohs 4.5
Cetineite
NaK₅Sb₁₄S₆O₁₈(H₂O)₆
Oxides & Hydroxide
Hexagonal
Chalcomenite
Cu(Se⁴⁺O₃)·2H₂O
Oxides & Hydroxide
Orthorhombic
Mohs 2–2.5
Chalcophanite
ZnMn⁴⁺₃O₇·3H₂O
Oxides & Hydroxide
Hexagonal
Mohs 2.5
Changbaiite
PbNb₂O₆
Oxides & Hydroxide
Hexagonal
Mohs 5.3
C
Charleshatchettite
CaNb₄O₁₀(OH)₂·8H₂O
Oxides & Hydroxide
Monoclinic
Mohs 4
Chekhovichite
Bi³⁺₂Te⁴⁺₄O₁₁
Oxides & Hydroxide
Monoclinic
Mohs 4
C
Chenmingite
FeCr₂O₄
Oxides & Hydroxide
Orthorhombic
Chervetite
Pb₂V⁵⁺₂O₇
Oxides & Hydroxide
Monoclinic
Mohs 3
C
Chihmingite
NiAl₂O₄
Oxides & Hydroxide
Cubic
C
Chihuahuaite
FeAl₁₂O₁₉
Oxides & Hydroxide
Hexagonal
C
Chiluite
Bi₃Te⁶⁺Mo⁶⁺O₁₀.₅
Oxides & Hydroxide
Hexagonal
Mohs 3.2
C
Chovanite
Pb₁₅₋₂ₓSb₁₄₊₂ₓS₃₆Oₓ (x~0.2)
Oxides & Hydroxide
Monoclinic
Mohs 3
C
Chromatite
CaCr⁶⁺O₄
Oxides & Hydroxide
Tetragonal
C
Chrombismite
Bi₁₆CrO₂₇
Oxides & Hydroxide
Tetragonal
Mohs 5.5
Chromite
Fe²⁺Cr₂O₄
Oxides & Hydroxide
Cubic
Mohs 5.5
Chrysoberyl
BeAl₂O₄
Oxides & Hydroxide
Orthorhombic
Mohs 8.5
C
Chukochenite
(Li₀.₅Al₀.₅)Al₂O₄
Oxides & Hydroxide
Orthorhombic
Mohs 8
C
Cianciulliite
Mg₂Mn²⁺Zn₂(OH)₁₀·2-4H₂O
Oxides & Hydroxide
Monoclinic
Mohs 2
C
Clarkeite
Na(UO₂)O(OH)·nH₂O
Oxides & Hydroxide
Hexagonal
Mohs 4–4.5
Cleusonite
Pb(U⁴⁺,U⁶⁺)Fe²⁺₂(Ti,Fe²⁺,Fe³⁺)₁₈(O,OH)₃₈
Oxides & Hydroxide
Hexagonal
Mohs 6–7
Cliffordite
UTe⁴⁺₃O₉
Oxides & Hydroxide
Mohs 4
Clinobehoite
Be(OH)₂
Oxides & Hydroxide
Monoclinic
Mohs 2–3
C
Clinocervantite
Sb³⁺Sb⁵⁺O₄
Oxides & Hydroxide
Monoclinic
Cobaltomenite
Co(Se⁴⁺O₃)·2H₂O
Oxides & Hydroxide
Monoclinic
Mohs 2.5
C
Cochromite
CoCr₂O₄
Oxides & Hydroxide
Cubic
Colemanite
CaB₃O₄(OH)₃·H₂O
Oxides & Hydroxide
Monoclinic
Mohs 4–4.5
Group
Columbite
(Fe,Mn)Nb₂O₆
Oxides & Hydroxide
Orthorhombic
Mohs 6–6.5
Columbite-(Fe)
Fe²⁺Nb₂O₆
Oxides & Hydroxide
Orthorhombic
C
Columbite-(Mg)
MgNb₂O₆
Oxides & Hydroxide
Orthorhombic
Columbite-(Mn)
Mn²⁺Nb₂O₆
Oxides & Hydroxide
Orthorhombic
Compreignacite
K₂(UO₂)₆O₄(OH)₆·7H₂O
Oxides & Hydroxide
Orthorhombic
Coronadite
Pb(Mn⁴⁺₆Mn³⁺₂)O₁₆
Oxides & Hydroxide
Monoclinic
Mohs 4.5–5
Corundum
Al₂O₃
Oxides & Hydroxide
Hexagonal
Mohs 9
Corvusite
(Na,Ca,K)₁₋ₓ(V⁵⁺,V⁴⁺,Fe²⁺)₈O₂₀·4H₂O
Oxides & Hydroxide
Monoclinic
Mohs 2.5–3
C
Coulsonite
Fe²⁺V³⁺₂O₄
Oxides & Hydroxide
Cubic
Mohs 4.5–5
C
Coyoteite
NaFe₃S₅·2H₂O
Oxides & Hydroxide
Triclinic
Mohs 1.5
Crednerite
CuMnO₂
Oxides & Hydroxide
Monoclinic
Mohs 4
Crichtonite
Sr(Mn,Y,U)Fe₂(Ti,Fe,Cr,V)₁₈(O,OH)₃₈
Oxides & Hydroxide
Trigonal
Mohs 4.5–5
C
Cronusite
Ca₀.₂CrS₂·2H₂O
Oxides & Hydroxide
Hexagonal
Mohs 1.5
Cryptomelane
K(Mn⁴⁺₇Mn³⁺)O₁₆
Oxides & Hydroxide
Tetragonal
Mohs 6–6.5
Cualstibite
Cu₂Al(OH)₆[Sb(OH)₆]
Oxides & Hydroxide
Hexagonal
Mohs 2
Cuprite
Cu₂O
Oxides & Hydroxide
Cubic
Mohs 3.5–4
C
Cupromolybdite
Cu²⁺₃O(Mo⁶⁺O₄)₂
Oxides & Hydroxide
Orthorhombic
Mohs 3
C
Cuprospinel
Cu²⁺Fe³⁺₂O₄
Oxides & Hydroxide
Cubic
Curite
Pb₃₊ₓ[(UO₂)₄O₄₊ₓ(OH)₃₋ₓ]₂·2H₂O
Oxides & Hydroxide
Orthorhombic
Mohs 4–5
Cuzticite
Fe³⁺₂Te⁶⁺O₆·3H₂O
Oxides & Hydroxide
Hexagonal
Mohs 3
D
Dagenaisite
Zn₃Te⁶⁺O₆
Oxides & Hydroxide
Monoclinic
Mohs 2
Daubréeite
BiO(OH)
Oxides & Hydroxide
Tetragonal
Mohs 2–2.5
Delafossite
Cu¹⁺Fe³⁺O₂
Oxides & Hydroxide
Trigonal
Mohs 5.5
Dellagiustaite
V²⁺Al₂O₄
Oxides & Hydroxide
Cubic
Mohs 6.5–7
D
Deltalumite
(Al₀.₆₇ ₀.₃₃)Al₂O₄
Oxides & Hydroxide
Tetragonal
Demesmaekerite
Pb₂Cu₅(UO₂)₂(Se⁴⁺O₃)₆(OH)₆·2H₂O
Oxides & Hydroxide
Triclinic
Mohs 3–4
Denningite
CaMn²⁺Te⁴⁺₄O₁₀
Oxides & Hydroxide
Tetragonal
Mohs 4
Derbylite
Fe³⁺₄Ti⁴⁺₃Sb³⁺O₁₃(OH)
Oxides & Hydroxide
Monoclinic
Mohs 5
Derriksite
Cu₄(UO₂)(Se⁴⁺O₃)₂(OH)₆
Oxides & Hydroxide
Orthorhombic
D
Dessauite-(Y)
Sr(Y,U,Mn)Fe₂(Ti,Fe,Cr,V)₁₈(O,OH)₃₈
Oxides & Hydroxide
Hexagonal
Mohs 2.5
Diaoyudaoite
NaAl₁₁O₁₇
Oxides & Hydroxide
Hexagonal
Mohs 7.6
Diaspore
AlO(OH)
Oxides & Hydroxide
Orthorhombic
Mohs 6.5–7
D
Dmitryivanovite
CaAl₂O₄
Oxides & Hydroxide
Monoclinic
Doloresite
V⁴⁺₃O₄(OH)₄
Oxides & Hydroxide
Monoclinic
Downeyite
SeO₂
Oxides & Hydroxide
Tetragonal
Doyleite
Al(OH)₃
Oxides & Hydroxide
Triclinic
Mohs 2.5–3
D
Dukeite
Bi³⁺₂₄Cr⁶⁺₈O₅₇(OH)₆·3H₂O
Oxides & Hydroxide
Hexagonal
Mohs 3–4
D
Dymkovite
Ni(UO₂)₂(As³⁺O₃)₂·7H₂O
Oxides & Hydroxide
Monoclinic
Mohs 3
Dzhalindite
In(OH)₃
Oxides & Hydroxide
Cubic
D
Dzhuluite
Ca₃(SbSn)(Fe³⁺O₄)₃
Oxides & Hydroxide
Cubic
Ecandrewsite
ZnTiO₃
Oxides & Hydroxide
Hexagonal
E
Eckhardite
(Ca,Pb)Cu²⁺Te⁶⁺O₅(H₂O)
Oxides & Hydroxide
Monoclinic
Mohs 2–3
Edoylerite
Hg²⁺₃(Cr⁶⁺O₄)S₂
Oxides & Hydroxide
Monoclinic
Ekebergite
ThFeNb₂O₈
Oxides & Hydroxide
Monoclinic
E
Ekplexite
(Nb,Mo)S₂·(Mg₁₋ₓAlₓ)(OH)₂₊ₓ
Oxides & Hydroxide
Hexagonal
Mohs 1
E
Elbrusite
Ca₃(U⁶⁺₀.₅Zr₁.₅)(Fe³⁺O₄)₃
Oxides & Hydroxide
Cubic
Ellinaite
CaCr₂O₄
Oxides & Hydroxide
Orthorhombic
Mohs 4.5–5
Emmonsite
Fe³⁺₂(Te⁴⁺O₃)₃·2H₂O
Oxides & Hydroxide
Triclinic
Mohs 5
Erdite
NaFeS₂·2H₂O
Oxides & Hydroxide
Monoclinic
Ernienickelite
NiMn⁴⁺₃O₇·3H₂O
Oxides & Hydroxide
Hexagonal
Mohs 2
Eskolaite
Cr₂O₃
Oxides & Hydroxide
Hexagonal
Mohs 8
Euxenite-(Y)
(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)₂O₆
Oxides & Hydroxide
Orthorhombic
Mohs 5.5–6.5
E
Eyselite
Fe³⁺Ge⁴⁺₃O₇(OH)
Oxides & Hydroxide
Orthorhombic
F
Fabianite
CaB₃O₅(OH)
Oxides & Hydroxide
Monoclinic
Mohs 6
Favreauite
PbBiCu₆O₄(SeO₃)₄(OH)·H₂O
Oxides & Hydroxide
Tetragonal
Mohs 3
F
Feiite
Fe²⁺₂(Fe²⁺Ti⁴⁺)O₅
Oxides & Hydroxide
Orthorhombic
Feitknechtite
Mn³⁺O(OH)
Oxides & Hydroxide
Hexagonal
F
Fergusonite-(Ce)
CeNbO₄·0.3H₂O
Oxides & Hydroxide
Tetragonal
Mohs 5.5–6.5
F
Fergusonite-(Ce)-β
CeNbO₄
Oxides & Hydroxide
Monoclinic
F
Fergusonite-(Nd)-β
NdNbO₄
Oxides & Hydroxide
Monoclinic
Fergusonite-(Y)
YNbO₄
Oxides & Hydroxide
Tetragonal
Mohs 5.5–6.5
F
Fergusonite-(Y)-β
YNbO₄
Oxides & Hydroxide
Monoclinic
Fernandinite
(Ca,Na,K)₀.₉(V⁵⁺,V⁴⁺,Fe²⁺,Ti)₈O₂₀·4H₂O
Oxides & Hydroxide
Monoclinic
F
Feroxyhyte
Fe³⁺O(OH)
Oxides & Hydroxide
Hexagonal
F
Ferricoronadite
Pb(Mn⁴⁺₆Fe³⁺₂)O₁₆
Oxides & Hydroxide
Tetragonal
Mohs 6
F
Ferrihollandite
Ba(Mn⁴⁺₆Fe³⁺₂)O₁₆
Oxides & Hydroxide
Monoclinic
Ferrihydrite
Fe³⁺₁₀O₁₄(OH)₂
Oxides & Hydroxide
Hexagonal
Ferrimolybdite
Fe³⁺₂(Mo⁶⁺O₄)₃·7H₂O
Oxides & Hydroxide
Mohs 1–2
F
Ferrohögbomite-2N2S
(Fe,Mg,Zn,Al)₃(Al,Ti,Fe)₈O₁₅(OH)
Oxides & Hydroxide
Hexagonal
Ferronigerite-2N1S
(Al,Fe,Zn)₂(Al,Sn)₆O₁₁(OH)
Oxides & Hydroxide
Hexagonal
Mohs 8–9
F
Ferronigerite-6N6S
(Al,Fe,Zn)₃(Al,Sn,Fe)₈O₁₅(OH)
Oxides & Hydroxide
Hexagonal
F
Ferrotaaffeite-2N'2S
(Fe²⁺,Mg,Zn)₃Al₈BeO₁₆
Oxides & Hydroxide
Hexagonal
F
Ferrotaaffeite-6N'3S
BeFe²⁺₂Al₆O₁₂
Oxides & Hydroxide
Hexagonal
Mohs 8–8.5
F
Ferrotitanowodginite
Fe²⁺TiTa₂O₈
Oxides & Hydroxide
Monoclinic
Mohs 5.5
F
Ferrotochilinite
FeS·≈0.85[Fe(OH)₂]
Oxides & Hydroxide
Monoclinic
Mohs 1
F
Ferrovalleriite
2[(Fe,Cu)S]·1.53[(Fe,Al,Mg)(OH)₂]
Oxides & Hydroxide
Hexagonal
Mohs 1
Ferrowodginite
Fe²⁺Sn⁴⁺Ta₂O₈
Oxides & Hydroxide
Monoclinic
Mohs 5.5
Fervanite
Fe³⁺₄V⁵⁺₄O₁₆·5H₂O
Oxides & Hydroxide
Fetiasite
(Fe²⁺,Fe³⁺,Ti⁴⁺)₃O₂As³⁺₂O₅
Oxides & Hydroxide
Monoclinic
Mohs 5
Filipstadite
(Fe³⁺₀.₅Sb⁵⁺₀.₅)Mn²⁺₂O₄
Oxides & Hydroxide
Cubic
Foordite
Sn²⁺Nb₂O₆
Oxides & Hydroxide
Monoclinic
Mohs 6
Formanite-(Y)
YTaO₄
Oxides & Hydroxide
Monoclinic
Mohs 5.5–6.5
Fourmarierite
Pb₁₋ₓO₃₋₂ₓ(UO₂)₄(OH)₄₊₂ₓ·4H₂O
Oxides & Hydroxide
Orthorhombic
Mohs 3–4
Franconite
NaNb₂O₅(OH)·3H₂O
Oxides & Hydroxide
Monoclinic
F
Frankhawthorneite
Cu₂Te⁶⁺O₄(OH)₂
Oxides & Hydroxide
Monoclinic
Mohs 3–4
Franklinite
ZnFe³⁺₂O₄
Oxides & Hydroxide
Cubic
Mohs 5.5–6.5
Franksousaite
PbCu(Se⁶⁺O₄)(OH)₂
Oxides & Hydroxide
Monoclinic
Freudenbergite
Na(Ti⁴⁺₃Fe³⁺)O₈
Oxides & Hydroxide
Monoclinic
Mohs 5
Frolovite
Ca[B(OH)₄]₂
Oxides & Hydroxide
Triclinic
Mohs 3.5
Gahnite
ZnAl₂O₄
Oxides & Hydroxide
Cubic
Mohs 7.5–8
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