Maricopaite Mineral Data

Maricopaite Mineral Data +

[Mineral Auctions] [Register] [Current Auctions] [Log In] [www.danweinrich.com]
Dan Weinrich Auctions
Specializing In Live Weekly Auctions Of Top Quality Mineral Specimens
The Place To Find Great Specimens At Great Prices!

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 % Al₂O₃

Silicon 20.09 % Si 42.98 % SiO₂

Hydrogen 1.26 % H 11.26 % H₂O

Lead 29.32 % Pb 31.58 % PbO

Oxygen 41.44 % O

______ ______

100.00 % 99.87 % = TOTAL OXIDE

Empirical Formula:

Pb_7.2Ca_2.2Al_11.6Si_36.4O₁₀₀·31.8(H₂O)

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.

Synonym:

ICSD 75278

PDF 46-1321

Maricopaite Image

Images:

Maricopaite

Comments: Opaque white prismatic maricopaite microcrystals and yellow crystalline mimetite.
Location: Moon Anchor Mine, near Tonopah, Maricopa County, Arizona, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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 - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Cm2m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 13.7(1), 3.216(0.5), 9.86(0.4),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Rouse R C , Peacor D R , American Mineralogist , 79 (1994) p.175-184, Maricopaite, an unusual lead calcium zeolite with an interrupted mordenite-like, framework and intrachannel Pb4 tetrahedral clusters

Physical Properties of Maricopaite

Cleavage:

[010] Imperfect

Color:

White.

Density:

2.94

Diaphaniety:

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

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:

r_electron=2.78 gm/cc
note: r_Maricopaite=2.93 gm/cc.

Fermion Index

Fermion Index = 0.0744
Boson Index = 0.9256

Photoelectric:

PE_Maricopaite= 475.84 barns/electron
U=PE_Maricopaite x r_electron=1,322.29 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Maricopaite is Not Radioactive

Maricopaite Classification

Dana Class:

77.1.6.3 (77)Tectosilicate Zeolite group

(77.1)true zeolites

(77.1.6)Mordenite and related species

77.1.6.1 Mordenite (Ca,Na2,K2)Al2Si10O24·7(H2O) C mc2₁ mm2

77.1.6.2 Epistilbite CaAl2Si6O16·5(H2O) C1 1

77.1.6.3 Maricopaite Pb7Ca2(Si,Al)48O100·32(H2O) Cm2m 2/m 2/m 2/m

77.1.6.4 Dachiardite-Ca (Ca,Na2,K2)5Al10Si38O96·25(H2O) C 2/m 2/m

77.1.6.5 Dachiardite-Na (Na2,Ca,K2)4Al4Si20O48·13(H2O) C 2/m 2/m

77.1.6.6 Ferrierite-Mg (Mg,Na,K)2Mg(Si,Al)18O36·9(H2O) Pnnm 2/m 2/m 2/m

77.1.6.6a Ferrierite-K! (K,Na)2Mg(Si,Al)18O36·9(H2O) Pnnm 2/m 2/m 2/m

77.1.6.6b Ferrierite-Na! (Na,K)2Mg(Si,Al)18O36·9(H2O) P 2₁/n 2/m 2/m 2/m

77.1.6.7 Boggsite NaCa2(Al5Si19O48)·17(H2O) I mma 2/m 2/m 2/m

77.1.6.8 Gottardiite! Na3Mg3Ca5Al19Si117O272·93(H2O) C mca 2/m 2/m 2/m

77.1.6.9 Terranovaite! (Na,Ca)8(Si68Al12)O160-29(H2O) C mcm 2/m 2/m 2/m

77.1.6.10 Mutinaite! Na3Ca4Si85Al11O192·60(H2O) P nma 2/m 2/m 2/m

Strunz Class:

VIII/H.35-20 VIII - Silicates

VIII/H - Phyllosilicates (layered) Mica minerals with other simple layers, [Si6O15]6- and others

VIII/H.35 - Jagoite - Maricopaite series

VIII/H.35-10 Jagoite (Pb,Na,Ca)3(Fe,Mg)Si3O10(Cl,OH) P 62c 6 m2

VIII/H.35-15 Hyttsjoite! Pb18Ba2Ca5Mn2Fe2Si30O90Cl·6(H2O) R 3 3

VIII/H.35-20 Maricopaite Pb7Ca2(Si,Al)48O100·32(H2O) Cm2m 2/m 2/m 2/m

Other Maricopaite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Am.Min.,Vol.74,p947,1989) OPTIC PROP.(Am.Min.,Vol.74,p947,1989)

Search for Maricopaite using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Maricopaite :
AA Mineral Specimens
B and L Minerals
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Minernet.it
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Maricopaite Mineral Data :

Ask about Maricopaite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Maricopaite Specimen Label here :

Maricopaite

Pb7Ca2(Si,Al)48O100·32(H2O)
Dana No: 77.1.6.3 Strunz No: VIII/H.35-20
Locality:

Notes: