Mineralogy Database

Mammothite Mineral Data

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General Mammothite Information

Help on Chemical  Formula: Chemical Formula: Pb6Cu4AlSb+++++O2(SO4)2Cl4(OH)16
Help on Composition: Composition: Molecular Weight = 2,284.17 gm
   Aluminum   1.18 %  Al    2.23 % Al2O3
   Copper    11.13 %  Cu   13.93 % CuO
   Antimony   5.33 %  Sb    7.08 % Sb2O5
   Hydrogen   0.71 %  H     6.31 % H2O
   Lead      54.43 %  Pb   58.63 % PbO
   Sulfur     2.81 %  S     7.01 % SO3
   Chlorine   6.21 %  Cl    6.21 % Cl
               -   %   Cl   -1.40 % -O=Cl2   
   Oxygen    18.21 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb6Cu4AlSbO2(SO4)2Cl4(OH)16
Help on Environment: Environment: Secondary lead mineral.
Help on IMA Status: IMA Status: Approved IMA 1985
Help on Locality: Locality: Mammoth vein, Tiger, Arizona, USA and from Laurium, Attika, Greece. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Mammothite + Pronunciation Say MAMMOTHITE
Help on Synonym: Synonym: ICSD 30992
  PDF 38-389

Mammothite Image

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Comments: Sparse blue crystalline mammothite in slag.
Location: Laurium, Attiki, Greece. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Mammothite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.5825:1:1.573
Help on Cell Dimensions: Cell Dimensions: a = 18.933, b = 7.331, c = 11.532, Z = 2; beta = 112.43° V = 1,479.52 Den(Calc)= 5.13
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.896(1), 6.67(0.9), 4.72(0.8),

Physical Properties of Mammothite

Help on Cleavage: Cleavage: {010} Distinct
Help on Color: Color: Bright blue, Greenish blue, Pale blue.
Help on Density: Density: 5.25
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 3 - Calcite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: pale blue

Optical Properties of Mammothite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.024 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1747,KPDmeas= 0.1707,KC= 0.1706
Ncalc = 1.88 - 1.9
Help on Optical Data: Optical Data: Biaxial (+), a=1.868, b=1.892, g=1.928, bire=0.0600, 2V(Calc)=80, 2V(Meas)=80.
Help on Pleochroism (x): Pleochroism (x): pale blue.
Help on Pleochroism (y): Pleochroism (y): blue.
Help on Pleochroism (z): Pleochroism (z): blue.

Calculated Properties of Mammothite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.58 gm/cc
note: Specific Gravity of Mammothite =5.25 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.12
Boson Index = 0.88
Help on Photoelectric: Photoelectric: PEMammothite = 982.10 barns/electron
U=PEMammothite x rElectron Density=4,496.54 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Mammothite is Not Radioactive

Mammothite Classification

Help on  Dana Class: Dana Class: (30)Anhydrous Sulfates Containing Hydroxyl or Halogen
  (30.01)where (A B)m (XO4)p Zq where m:p>2:1
  (30.01.14)Dana Group Mammothite Pb6Cu4AlSbO2(SO4)2Cl4(OH)16 C 2/m 2/m
Help on  Strunz Class: Strunz Class: 07.BC.60 07 - SULFATES (SELENATES, TELLURATES)
  07.B - Sulfates (selenates, etc.) with Additional Anions, without H2O
  07.BC -With medium-sized and large cations
07.BC.60 Mammothite Pb6Cu4AlSbO2(SO4)2Cl4(OH)16 C 2/m 2/m

Other Mammothite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Mammothite :
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 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Dana No: Strunz No: 07.BC.60





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