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Truscottite Mineral Data

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General Truscottite Information

Help on Chemical  Formula: Chemical Formula: (Ca,Mn++)14Si24O58(OH)8•2(H2O)
Help on Composition: Composition: Molecular Weight = 2,364.92 gm
   Calcium    20.34 %  Ca   28.45 % CaO
   Manganese   4.65 %  Mn    6.00 % MnO
   Silicon    28.50 %  Si   60.98 % SiO2
   Hydrogen    0.51 %  H     4.57 % H2O
   Oxygen     46.00 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca12Mn2+2Si24O58(OH)8•2(H2O)
Help on Environment: Environment: Hydrothermal deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1914
Help on Locality: Locality: Lelong Donok gold mine, Benkeelen, Sumatra, Indonesia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Samuel John Truscott (1970-1950), English mining geologist.
Help on Name Pronunciation: Name Pronunciation: Truscottite + Pronunciation Say TRUSCOTTITE

Truscottite Image

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Comments: Whitish pearly scaly massive truscottite.
Location: Lebong Donok Mine, Benkeelen, Sumatra Island, Indonesia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Truscottite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.93566
Help on Cell Dimensions: Cell Dimensions: a = 9.731, c = 18.836, Z = 1; V = 1,544.67 Den(Calc)= 2.54
Help on Crystal System: Crystal System: Trigonal Space Group: p3 or p3
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.141(1), 2.84(0.8), 4.21(0.7),

Physical Properties of Truscottite

Help on Cleavage: Cleavage: {0001} Perfect
Help on Color: Color: White.
Help on Density: Density: 2.35
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Micaceous - Platy texture with "flexible" plates.
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Luster: Luster: Pearly
Help on Streak: Streak: white

Optical Properties of Truscottite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.076 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.004 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.213,KPDmeas= 0.2302,KC= 0.2139
Ncalc = 1.5 - 1.54
Help on Optical Data: Optical Data: Uniaxial (-), e=1.552, w=1.53, bire=0.0220.

Calculated Properties of Truscottite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.54 gm/cc
note: Specific Gravity of Truscottite =2.54 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PETruscottite = 4.75 barns/electron
U=PETruscottite x rElectron Density= 12.05 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Truscottite is Not Radioactive

Truscottite Classification

Help on  Dana Class: Dana Class: 73.02.02a.02 (73)Phyllosilicate Condensed Tetrahedral Sheets
  (73.02)with double and single layers
  (73.02.02a)Reyerite group (Reyerite Subgroup)
73.02.02a.01 Reyerite (Na,K)4Ca14Si22Al2O58(OH)8•6(H2O) P 3 3
73.02.02a.02 Truscottite (Ca,Mn)14Si24O58(OH)8•2(H2O) p3 or p3 Trig
Help on  Strunz Class: Strunz Class: 09.EE.35 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EE -Single tetrahedral nets of 6-membered rings
09.EE.35 Reyerite (Na,K)4Ca14Si22Al2O58(OH)8•6(H2O) P 3 3
09.EE.35 Truscottite (Ca,Mn)14Si24O58(OH)8•2(H2O) p3 or p3 Trig

Other Truscottite Information

Help on References: References: NAME( Ford32) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Truscottite :
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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Dana No: 73.02.02a.02 Strunz No: 09.EE.35





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