Maricopaite Mineral Data
General Maricopaite Information
Chemical Formula:
Pb7Ca2(Si,Al)48O100•32(H2O)
Composition:
Molecular Weight = 5,088.14 gm
Calcium 1.73 % Ca 2.42 % CaO
Aluminum 6.15 % Al 11.62 % Al2 O3
Silicon 20.09 % Si 42.98 % SiO2
Hydrogen 1.26 % H 11.26 % H2 O
Lead 29.32 % Pb 31.58 % PbO
Oxygen 41.44 % O
______ ______
100.00 % 99.87 % = TOTAL OXIDE
Empirical Formula:
Pb7.2 Ca2.2 Al11.6 Si36.4 O100 •31.8(H2 O)
Environment:
In a hydrothermal Pb-Cu ore vein, coating and filling fractures in quartz.
IMA Status:
Approved IMA 1988
Locality:
Moon Anchor mine, near Tonopah, Maricopa County, Arizona, USA. Link to MinDat.org Location Data.
Name Origin:
Named for the locality.
Name Pronunciation:
Maricopaite + Pronunciation
Synonym:
ICSD 75278
PDF 46-1321
Maricopaite Image
Images:
Maricopaite Crystallography
Axial Ratios:
a:b:c =0.9863:1:0.3826
Cell Dimensions:
a = 19.434, b = 19.702, c = 7.538, Z = 1; V = 2,886.21 Den(Calc)= 2.93
Crystal System:
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Cm2m
X Ray Diffraction:
By Intensity(I/Io ): 13.7(1), 3.216(0.5), 9.86(0.4),
Physical Properties of Maricopaite
Cleavage:
{010} Imperfect
Color:
White.
Density:
2.94
Diaphaneity:
Translucent
Fracture:
Friable - The crumbly disintegration of earthy materials or highly fractured minerals.
Habit:
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Hardness:
1-1.5 - Talc or a little harder
Luster:
Vitreous - Silky
Streak:
white
Optical Properties of Maricopaite
Gladstone-Dale:
CI meas = 0.01 (Superior) - where the CI = (1-KPDmeas /KC ) CI calc = 0.006 (Superior) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.1976,KPDmeas = 0.1969,KC = 0.1988 Ncalc = 1.58
Optical Data:
Biaxial (-), a=1.563, b=1.582, g=1.592, bire=0.0290, 2V(Calc)=70, 2V(Meas)=70. Dispersion r > v strong.
Calculated Properties of Maricopaite
Electron Density:
Bulk Density (Electron Density)=2.78 gm/cc note: Specific Gravity of Maricopaite =2.93 gm/cc.
Fermion Index:
Fermion Index = 0.07 Boson Index = 0.93
Photoelectric:
PEMaricopaite = 475.84 barns/electronU=PEMaricopaite x r Electron Density=1,322.29 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Maricopaite is Not Radioactive
Maricopaite Classification
Dana Class:
77.01.06.03 (77) Tectosilicate Zeolite group
(77.01) true zeolites
(77.01.06) Mordenite and related species
77.01.06.01 Mordenite (Ca,Na2,K2)Al2Si10O24•7(H2O) C mc21 mm2
77.01.06.02 Epistilbite CaAl2Si6O16•5(H2O) C1 1
77.01.06.03 Maricopaite Pb7Ca2(Si,Al)48O100•32(H2O) Cm2m 2/m 2/m 2/m
77.01.06.04 Dachiardite-Ca (Ca,Na2,K2)5Al10Si38O96•25(H2O) C 2/m 2/m
77.01.06.05 Dachiardite-Na (Na2,Ca,K2)4Al4Si20O48•13(H2O) C 2/m 2/m
77.01.06.06 Ferrierite-Mg (Mg,Na,K)2Mg(Si,Al)18O36•9(H2O) Pnnm 2/m 2/m 2/m
77.01.06.06a Ferrierite-K ! (K,Na)2Mg(Si,Al)18O36•9(H2O) Pnnm 2/m 2/m 2/m
77.01.06.06b Ferrierite-Na ! (Na,K)2Mg(Si,Al)18O36•9(H2O) P 21 /n 2/m
77.01.06.07 Boggsite NaCa2(Al5Si19O48)•17(H2O) I mma 2/m 2/m 2/m
77.01.06.08 Gottardiite ! Na3Mg3Ca5Al19Si117O272•93(H2O) C mca 2/m 2/m 2/m
77.01.06.09 Terranovaite ! (Na,Ca)8(Si68Al12)O160•29(H2O) C mcm 2/m 2/m 2/m
77.01.06.10 Mutinaite ! Na3Ca4Si85Al11O192•60(H2O) P nma 2/m 2/m 2/m
77.01.06.12 Direnzoite ! NaK6MgCa2(Al13Si47O120)•36H2O Pmmn 2/m 2/m 2/m
Strunz Class:
09.GD.35 09 - SILICATES (Germanates)
09.G - Tektosilicates with Zeolitic H2O
09.GD -Chains of 6-membered rings � tabular zeolites
09.GD.35 Maricopaite Pb7Ca2(Si,Al)48O100•32(H2O) Cm2m 2/m 2/m 2/m
09.GD.35 Mordenite (Ca,Na2,K2)Al2Si10O24•7(H2O) C mc21 mm2
Other Maricopaite Information
References:
NAME( AntBidBlaNic2) PHYS. PROP.(Am.Min.,Vol.74,p947,1989) OPTIC PROP.(Am.Min.,Vol.74,p947,1989)
See Also:
Links to other databases for Maricopaite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST
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Maricopaite
Pb7Ca2(Si,Al)48O100•32(H2O)
Dana No: 77.01.06.03 Strunz No: 09.GD.35
Locality:
Notes:
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