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Mapiquiroite

A valid IMA mineral species
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Named in honour of four Italian mineral collectors, RiccardoMazzanti (b. 1953), LuigiPierotti (b. 1953), UgoQuilici (b. 1946), and MorenoRomani (b. 1949) for their contribution to the study of the mineralogy of baryte + pyrite + iron oxide deposits from the Apuan Alps.
Co-Type Localities:
ⓘBuca della Vena Mine, Pontestazzemese, Stazzema, Lucca Province, Tuscany, Italy
ⓘMonte Arsiccio Mine, Sant'Anna di Stazzema, Stazzema, Lucca Province, Tuscany, Italy
Unique combination of elements. The Sr analogue ofcleusonite and U analogue ofcrichtonite.


Unique Identifiers
IMA Formula:
(Sr,Pb)(U,Y)Fe2(Ti,Fe3+)18O38
Approval year:
2013
First published:
2014
Type description reference:
Biagioni, Cristian, Orlandi, Paolo, Pasero, Marco, Nestola, Fabrizio, Bindi, Luca (2014) Mapiquiroite, (Sr,Pb)(U,Y)Fe2(Ti,Fe3+)18O38, a new member of the crichtonite group from the Apuan Alps, Tuscany, Italy.European Journal of Mineralogy, 26 (3) 427-437doi:10.1127/0935-1221/2014/0026-2382

Classification of Mapiquiroite

Mineral Symbols
Colour:
Black
Hardness:
6 onMohs scale
Hardness:
VHN100=750 - 782 - Vickers
Density:
4.670 - 4.843 g/cm3 (Measured)    

Optical Data of Mapiquiroite
Colour in reflected light:
Blackish
Internal Reflections:
Absent
Pleochroism:
Non-pleochroic

Chemistry of Mapiquiroite
Common Impurities:
Pb,Y,V(V),Cr,Mn,La

Crystallography of Mapiquiroite
General Appearance of Type Material:
Complex rhombohedral or tabular pseudo-hexagonal crystals, up to 1mm in size ((Buca della Vena). Tabular pseudo-hexagonal crystals, up to 5mm in size (Monte Arsiccio).
Place of Conservation of Type Material:
Type material is deposited in the collections of the collections of the Museo di Storia Naturale, Universita` di Pisa, Via Roma 79, Calci (Pisa), Italy, catalogue numbers 18837 (Buca della Vena) and 19650 (Monte Arsiccio)
Geological Setting of Type Material:
Quartz-adularia-baryte veins embedded in schists (Buca della Vena). Quartz-carbonate veins embedded in magnetite-rich dolostones(Monte Arsiccio).
Associated Minerals at Type Locality:
Allanite-(Ce)AnataseBaryteBoulangeriteDerbylite
DestineziteGypsumMonazite-(Ce)PyriteRutile
SideriteSphaleriteTourmaline
Reference:
Biagioni, Cristian, Orlandi, Paolo, Pasero, Marco, Nestola, Fabrizio, Bindi, Luca (2014) Mapiquiroite, (Sr,Pb)(U,Y)Fe2(Ti,Fe3+)18O38, a new member of the crichtonite group from the Apuan Alps, Tuscany, Italy.European Journal of Mineralogy, 26 (3) 427-437doi:10.1127/0935-1221/2014/0026-2382

Synonyms of Mapiquiroite

Relationship of Mapiquiroite to other Species
Other Members of Crichtonite Group:
AlmeidaitePbZn2(Mn,Y)(Ti,Fe3+)18O37(OH,O)Trig.3 :R3
BotuobinskiteSrFe2+Mg2(Cr3+6Ti4+12)[O36(OH)2]Trig.3 :R3
Cleusonite(Pb,Sr)(U4+,U6+)(Fe2+,Zn)2(Ti,Fe2+,Fe3+)18(O,OH)38Trig. 3 :R3
CrichtoniteSr(Mn,Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH)38Trig.3 :R3
Davidite-(Ce)Ce(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38Trig.3 :R3
Davidite-(La)La(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38Trig.3 :R3
Davidite-(Y)(La,Ce,Na,Ca,Pb)(Y,Fe2+,◻)(Fe2+,Mn2+)2(Ti,Fe3+,Nb,Zr)18O38 (hypothetical)Trig.
Dessauite-(Y)(Sr,Pb)(Y,U)(Ti,Fe3+)20O38Trig.3 :R3
Gramaccioliite-(Y)(Pb,Sr)(Y,Mn)Fe3+2(Ti,Fe3+)18O38Trig.3 :R3
Haitaite-(La)LaU4+Fe3+2(Ti13Fe2+4Fe3+)O38Trig.3 :R3
LandauiteNaMnZn2(Ti,Fe)6Ti12O38Trig.3 :R3
Lindsleyite(Ba,Sr)(Zr,Ca)(Fe,Mg)2(Ti,Cr,Fe)18O38Trig.
Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38Trig.3 :R3
Mathiasite(Mg,Cr,Fe,Ca,K)2(Ti,Zr,Cr,Fe)5O12Trig.3 :R3
Mianningite(◻,Pb,Ce,Na)(U4+,Mn,U6+)Fe3+2 (Ti,Fe3+)18O38Trig.3 :R3
MirnyiteSrZr4+Mg2(Cr3+6Ti4+12)O38Trig.3 :R3
PaseroitePbMn2+(Mn2+,Fe3+)2(V5+,Ti,◻)18O38Trig.3 :R3
SaranovskiteSrCaFe2+2(Cr4Ti2)Ti12O38Trig.3 :R3
SenaitePb(Mn,Y,U)(Fe,Zn)2(Ti,Fe,Cr,V)18(O,OH)38Trig.3 :R3
UM1987-03-O:FePbTiU~(U,Pb)(Ti,Fe3+,Fe2+,Mn)21O38Trig.3 :R3
UM2003-08-O:AlCaFeREEScTiV(Ca,Ce)Sc(Ti,V,Fe,Al)20O38
UM2006-05-O:CaFeKMnNaREESrTiZr(Sr,Na,K,REE)(Ca,Zr,Mn)(Ti,Fe)18Fe2O38
UM2006-06-O:CaFeKMnNaREESrTiZr(Sr,Na,K,REE)(Zr,Ca,Mn)(Ti,Fe)18Fe2O38
UM2006-07-O:CaFeKMnNaREESrTiZr(Na,Sr,K,REE)(Ca,Zr,Mn)(Ti,Fe)18Fe2O38
UM2006-08-O:CaFeKMnNaREESrTiZr(Na,Sr,K,REE)(Zr,Ca,Mn)(Ti,Fe)18Fe2O38
UM2006-09-O:CaFeMnREESrTiZr(Ce,Sr,REE)(Ca,Mn,Zr)Fe2(Ti,Fe)18O38
Unnamed (HBU UK-4)NaFe2+Zn2(Ti,Fe3+,Nb)6Ti12O38Trig.3 :R3

Related Minerals -Strunz-mindat Grouping(Be,Zn,Mg)FeAl4O8Trig.3m(32/m) :R3m4.00.UM2004-19-O:AlCeGdZr(Gd,Ce)4Al2Zr4O174.00.AlmeidaitePbZn2(Mn,Y)(Ti,Fe3+)18O37(OH,O)Trig.3 :R34.00.VapnikiteCa2CaUO6Mon. 2/m4.00.Microlite GroupA2-mTa2X6-wZ-nIso.m3m(4/m32/m) :Fd3m4.00.UM2004-21-O:CaFeGdZrCa2Gd4Fe5ZrO154.00.UM2004-27-O:GdTiGd2Ti4O114.00.GoethiteFe3+O(OH)Orth.mmm(2/m2/m2/m) :Pnma4.00.Písekite-(Y)(Y,As,Ca,Fe,U)(Nb,Ti,Ta)O44.00.Pyrochlore GroupA2Nb2(O,OH)6Z

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    • References for MapiquiroiteⓘBuca della Vena Mine (TL)Williams et al. (2013)+2 other referencesWilliams et al. (2013)+2 other references
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