monoclinic
120 minerals — Crystal system
acanthite
Ag2S
◇
achalaite
Fe^2⁺TiNb2O8
actinolite
Ca2(Mg,Fe)5[OH|Si4O11]2
acuminite
SrAlF4(OH)·H2O
admontite
MgB6O10·7H2O
aegirine
NaFe^3⁺Si2O6
afwillite
Ca3[SiO3(OH)]2·2H2O
ahlfeldite
NiSeO3·2H2O
akaganeite
(Fe^3⁺,Ni^2⁺)8(OH,O)16Cl1.25·nH2O
◇
akaogiite
TiO2
akrochordite
Mn^2⁺5(AsO4)2(OH)4·4H2O
alacránite
As8S9
alamosite
PbSiO3
◇
aleutite
[Cu5O2](AsO4)(VO4)·(Cu,K,Pb,Rb,Cs,)Cl
aliettite
Ca0.2Mg6(Si,Al)8O20(OH)4·4H2O
allactite
Mn^2⁺7(AsO4)2(OH)8
allanpringite
Fe^3⁺3(PO4)2(OH)3·5H2O
alleghanyite
Mn^2⁺5(SiO4)2(OH)2
◇
alloclasite
CoAsS
alluaudite
(Na,Ca)(Mn,Mg,Fe^2⁺)(Fe^3⁺,Mn^2⁺)2(PO4)3
alpersite
Mg(SO4)·7H2O
◇
alsakharovite-Zn
NaSrKZn(Ti,Nb)4(Si4O12)2(O,OH)4·7H2O
alterite
Zn2Fe^3⁺4(SO4)4(C2O4)2(OH)4 * 17H2O
◇
altisite
Na3K6Ti2Al2Si8O26Cl3
aluminite
Al2SO4(OH)4·7H2O
aluminoceladonite
K(Mg,Fe^2⁺)Al(Si4O10)(OH)2
alvanite
ZnAl4(V(V)O3)2(OH)12·2H2O
ameghinite
NaB3O3(OH)4
amicite
K2Na2(Al4Si4O16)·5H2O
◇
anandite
BaFe^2⁺3(Si3Fe^3⁺)O10S(OH)
andyrobertsite
KCdCu5(AsO4)4[As(OH)2O2]·2H2O
annabergite
Ni3(AsO4)2·8H2O
annite
anthonyite
antigorite
Mg3Si2O5(OH)4
◇
anzaite-(Ce)
Ce4Fe^2⁺Ti6O18(OH)2
◇
apachite
Cu9Si10O29·11H2O
apjohnite
Mn^2⁺Al2(SO4)4 * 22H2O
aplowite
Co(SO4)·4H2O
◇
arakiite
ZnMn^2⁺12Fe^3⁺2(As^3⁺O3)(As^5⁺O4)2(OH)23
ardaite
Pb17Sb15S35Cl9
arfvedsonite
NaNa2(Fe^2⁺4Fe^3⁺)Si8O22(OH)2
argentobaumhauerite
Ag1.5Pb22As33.5S72
argentopyrite
AgFe2S3
armstrongite
CaZr(Si6O15)·2H2O
arseniosiderite
Ca2Fe^3⁺3(AsO4)3O2 * 3H2O
arsenopyrite
FeAsS
arthurite
CuFe^3⁺2(AsO4)2(OH)2 * 4H2O
artinite
Mg2CO3(OH)2·3H2O
aschamalmite
Pb6Bi2S9
◇
aspidolite
NaMg3(AlSi3O10)(OH)2
atelestite
Bi2(AsO4)O(OH)
augelite
Al2PO4(OH)3
augite
(Ca,Na)(Mg,Fe,Al,Ti)(Si,Al)2O
aurichalcite
(Zn,Cu^2⁺)5(CO3)2(OH)6
baddeleyite
ZrO2
baratovite
KCa7(Ti,Zr)2Li3Si12O36F2
◇
bartelkeite
PbFeGe(Ge2O7)(OH)2·H2O
barytocalcite
BaCa(CO3)2
bassanite
CaSO4·0.5H2O
bayldonite
Cu3PbO(AsO3OH)2(OH)2
bayleyite
Mg2(UO2)(CO3)3 * 18H2O
◇
belloite
Cu(OH)Cl
beraunite
Fe^3⁺6(PO4)4O(OH)4(H2O)4·2H2O
bergenite
Ca2Ba4(UO2)9O6(PO4)6·16H2O
berryite
Cu3Ag2Pb3Bi7S16
beryllonite
NaBePO4
◇
bettertonite
Al6(AsO4)3(OH)9·16H2O
bieberite
CoSO4·7H2O
biehlite
((Sb,As)O)2[MoO4]
◇
bijvoetite-(Y)
Y8(UO2)16(CO3)16O8(OH)8·39H2O
bílinite
◇
billwiseite
Sb^3⁺5Nb3WO18
bischofite
MgCl2·6H2O
bismite
Bi2O3
bobfergusonite
Na2Mn5FeAl(PO4)6
boltwoodite
(K,Na)(UO2)(SiO3OH)·1.5H2O
boothite
CuSO4·7H2O
botryogen
MgFe^3⁺(SO4)2(OH)·7H2O
boulangerite
Pb5Sb4S11
brannerite
UTi2O6
◇
braunerite
K2Ca(UO2)(CO3)3·6H2O
brazilianite
NaAl3(PO4)2(OH)4
◇
brezinaite
Cr3S4
brianite
Na2CaMg(PO4)2
brianyoungite
Zn3(CO3,SO4)(OH)4
brochantite
Cu4SO4(OH)6
brushite
Ca(PO3OH)·2H2O
buddingtonite
(NH4)AlSi3O8
cabalzarite
CaMg2(AsO4)2·2H2O
◇
cabrerite
NiMg2(AsO4)2·8H2O
cafetite
CaTi2O5·H2O
calaverite
AuTe2
◇
calclacite
Ca(CH3COO)Cl·5H2O
campigliaite
Cu4Mn^2⁺(SO4)2(OH)6·4H2O
canavesite
Mg2(HBO3)(CO3)·5H2O
carnotite
K2(UO2)2(VO4)2·3H2O
carpathite
C24H12
castellaroite
Mn^2⁺3(AsO4)2*4H2O
celadonite
celsian
BaAl2Si2O8
cervandonite-(Ce)
(Ce,Nd,La)(Fe^3⁺,Fe^2⁺,Ti,Al)3O2(Si2O7)(As^3⁺O3)(OH)
chalcocite
Cu2S
chalconatronite
Na2Cu(CO3)2 * 3H2O
challacolloite
KPb2Cl5
chamosite
(Fe^2⁺,Mg,Al,Fe^3⁺)6(Si,Al)4O10(OH,O)8
chapmanite
◇
charleshatchettite
CaNb4O10(OH)2*8H2O
chondrodite
Mg5(SiO4)2F2
◇
chrisstanleyite
Ag2Pd3Se4
chrysotile
Mg3Si2O5(OH)4
◇
chukanovite
Fe2(CO3)(OH)2
chvaleticeite
(Mn,Mg)SO4·6H2O
claudetite
As2O3
◇
clearcreekite
(Hg+2)1.5(CO3)(OH) * 2H2O
◇
clinocervantite
Sb^3⁺Sb5+O4
clinoclase
Cu3AsO4(OH)3
clinohedrite
CaZn(SiO4) * H2O
clinohumite
Mg9(SiO4)4F2
clinozoisite
Ca2Al3(Si2O7)(SiO4)O(OH)