Santanaite Mineral Data

General Santanaite Information

Chemical Formula:

Pb++9Pb++++2CrO16

Composition:

Molecular Weight = 2,587.19 gm

Chromium 2.01 % Cr 3.86 % CrO₃

Lead 88.10 % Pb 77.64 % PbO / 18.49 % PbO₂

Oxygen 9.89 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Pb₉Pb₂CrO₁₆

Environment:

Alteration product of galena with other chromium-bearing minerals in an oxidized hydrothermal lead deposit.

IMA Status:

Approved IMA 1972

Locality:

Santa Ana mine, near Caracoles, Sierra Gorda district, Antofagasta, Chile. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Santanaite + Pronunciation

Santanaite Crystallography

Axial Ratios:

a:c = 1:4.41196

Cell Dimensions:

a = 9.03, c = 39.84, Z = 6; V = 2,813.36 Den(Calc)= 9.16

Crystal System:

Hexagonal - Trapezohedral H-M Symbol (6 2 2) Space Group: P 6₃22

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

By Intensity(I/I_o): 3.539(1), 2.606(0.8), 2.08(0.5),

Physical Properties of Santanaite

Cleavage:

{0001} Perfect, {1210} Perfect

Color:

Straw yellow.

Density:

9.155

Hardness:

4 - Fluorite

Optical Properties of Santanaite

Gladstone-Dale:

CI meas= 0.017 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.018 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1332,KPDmeas= 0.1333,KC= 0.1356
Ncalc = 2.24

Optical Data:

Uniaxial (-), e=2.12, w=2.32, bire=0.2000.

Calculated Properties of Santanaite

Electron Density:

Bulk Density (Electron Density)=7.46 gm/cc
note: Specific Gravity of Santanaite =9.16 gm/cc.

Fermion Index:

Fermion Index = 0.19
Boson Index = 0.81

Photoelectric:

PE_Santanaite=1,660.31 barns/electron
U=PE_Santanaite x rElectron Density=12384.82 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Santanaite is Not Radioactive

Santanaite Classification

Dana Class:

35.04.01.01 (35)Anhydrous Chromates

(35.04)with miscellaneous formulae

(35.04.01)Dana Group

35.04.01.01 Santanaite Pb9Pb2CrO16 P 6₃22 6 2 2

Strunz Class:

07.FB.10 07 - SULFATES (SELENATES, TELLURATES)

07.F - Chromates

07.FB -With additional O, V, S, Cl

07.FB.10 Santanaite Pb9Pb2CrO16 P 6₃22 6 2 2

Other Santanaite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Santanaite :
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

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

Santanaite

Pb++9Pb++++2CrO16
Dana No: 35.04.01.01 Strunz No: 07.FB.10
Locality:

Notes:

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