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Quintinite-3T Mineral Data

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General Quintinite-3T Information

Help on Chemical  Formula: Chemical Formula: Mg4Al2(OH)12CO3•4(H2O)
Help on Composition: Composition: Molecular Weight = 487.34 gm
   Magnesium  19.95 %  Mg   33.08 % MgO
   Aluminum   11.07 %  Al   20.92 % Al2O3
   Hydrogen    4.14 %  H    36.97 % H2O
   Carbon      2.46 %  C     9.03 % CO2
   Oxygen     62.38 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg4Al2(OH)12(CO3)•4(H2O)
Help on Environment: Environment: Related to caresite-2H, charmarite-2H and charmarite-3T.
Help on IMA Status: IMA Status: Approved IMA 1995
Help on Locality: Locality: Found in the Demix quarry, Mont Saint-Hilaire, Quebec, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Quintin Wight (b. 1935), of Ottawa, Ontario, Canada, significant contributor to mineral studies at Mont Saint-Hilaire, and author of The Complete Book of Micromounting ( 1993).
Help on Name Pronunciation: Name Pronunciation: Quintinite-3T + Pronunciation Say QUINTINITE-3T
Help on Synonym: Synonym: IMA1992-029

Quintinite-3T Image

Click Here for Larger   Image in a New Browser Window Images:
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  Quintinite-2H   Quintinite-3T

Comments: Pale brownish crystals of quintinite, 2H or 2T polytype unknown.
Location: Jacupiranga Mine, São Paulo, Southeast Region, Brazil. Scale: Picture size 7 mm.
© Thomas Witzke / Abraxas-Verlag

Quintinite-3T Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.14833
Help on Cell Dimensions: Cell Dimensions: a = 10.571, c = 22.71, Z = 6; V = 2,197.76 Den(Calc)= 2.21
Help on Crystal System: Crystal System: Trigonal - Trapezohedral H-M Symbol (3 2) Space Group: P 3112,P 3212
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.57(1), 3.778(0.9), 2.57(0.4),

Physical Properties of Quintinite-3T

Help on Cleavage: Cleavage: {0001} Perfect
Help on Color: Color: Colorless, Pale yellow, Bright yellow.
Help on Density: Density: 2.14
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Pseudo Hexagonal - Crystals show a hexagonal outline.
Help on Habit: Habit: Rosette - Bundled tabular aggregates resembling rose flower petals.
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Quintinite-3T

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.02 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.051 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2412,KPDmeas= 0.2491,KC= 0.2542
Ncalc = 1.54 - 1.56
Help on Optical Data: Optical Data: Uniaxial (+/-), a=1.533, b=1.533, bire=0.0000.

Calculated Properties of Quintinite-3T

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.21 gm/cc
note: Specific Gravity of Quintinite-3T =2.14 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEQuintinite-3T = 0.90 barns/electron
U=PEQuintinite-3T x rElectron Density= 2.00 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Quintinite-3T is Not Radioactive

Quintinite-3T Classification

Help on  Dana Class: Dana Class: 16b.06.04.02 (16b)Carbonates - Hydroxyl or Halogen
  (16b.06)Dana Type
  (16b.06.04)Quintinite - Charmarite Group
16b.06.04.01 Quintinite-2H Mg4Al2(OH)12CO3•4(H2O) P 6322 6 2 2
16b.06.04.02 Quintinite-3T Mg4Al2(OH)12CO3•4(H2O) P 3112,P 3212 3 2
16b.06.04.03 Caresite Fe4Al2(OH)12CO3•3(H2O) P 3112 or P 3212 3 2
16b.06.04.04 Charmarite-2H Mn4Al2(CO3)(OH)12•3(H2O) P 6322 6 2 2
16b.06.04.05 Charmarite-3T Mn4Al2(CO3)(OH)12•3(H2O) P 3112 3 2
Help on  Strunz Class: Strunz Class: 05.DA.40 05 - CARBONATES (NITRATES)
  05.D - Carbonates with Additional Anions, with H2O
  05.DA -With medium-sized cations
05.DA.40 Charmarite-3T Mn4Al2(CO3)(OH)12•3(H2O) P 3112 3 2
05.DA.40 Charmarite-2H Mn4Al2(CO3)(OH)12•3(H2O) P 6322 6 2 2
05.DA.40 Caresite Fe4Al2(OH)12CO3•3(H2O) P 3112 or P 3212 3 2
05.DA.40 Quintinite-2H Mg4Al2(OH)12CO3•4(H2O) P 6322 6 2 2
05.DA.40 Quintinite-3T Mg4Al2(OH)12CO3•4(H2O) P 3112,P 3212 3 2

Other Quintinite-3T Information

Help on References: References: NAME( CanMin, 8/99) PHYS. PROP.(Dana8) OPTIC PROP.(Am.Min.,Vol.83,p1347,1998)
Help on See Also: See Also: Links to other databases for Quintinite-3T :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: 16b.06.04.02 Strunz No: 05.DA.40





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