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Strontiodresserite Mineral Data

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General Strontiodresserite Information

Help on Chemical  Formula: Chemical Formula: (Sr,Ca)Al2(CO3)2(OH)4•(H2O)
Help on Composition: Composition: Molecular Weight = 335.76 gm
   Strontium  19.57 %  Sr   23.15 % SrO
   Calcium     2.98 %  Ca    4.18 % CaO
   Aluminum   16.07 %  Al   30.37 % Al2O3
   Hydrogen    1.80 %  H    16.10 % H2O
   Carbon      7.15 %  C    26.21 % CO2
   Oxygen     52.42 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Sr0.75Ca0.25Al2(CO3)2(OH)4•(H2O)
Help on Environment: Environment: Crystalline coating in vugs in a silicocarbonatite sill.
Help on IMA Status: IMA Status: Approved IMA 1977
Help on Locality: Locality: Francon quarry, Montreal Island, Montreal, Quebec, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the strontium analog of dresserite.
Help on Synonym: Synonym: IMA1977-005
 

Strontiodresserite Image

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  Strontiodresserite

Comments: Opaque white spherical strontiodresserite, with radial structure.
Location: Francon Quarry, Montreal, Quebec, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Strontiodresserite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5744:1:0.3516
Help on Cell Dimensions: Cell Dimensions: a = 9.14, b = 15.91, c = 5.594, Z = 4; V = 813.46 Den(Calc)= 2.74
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pbmm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.93(1), 4.39(0.8), 3.002(0.7),
 

Physical Properties of Strontiodresserite

Help on Color: Color: White.
Help on Density: Density: 2.71
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Strontiodresserite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.035 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.046 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2054,KPDmeas= 0.2076,KC= 0.2152
Ncalc = 1.58 - 1.59
Help on Optical Data: Optical Data: Biaxial (-), a=1.51, b=1.583, g=1.595, bire=0.0850, 2V(Calc)=42, 2V(Meas)=42.5.
 

Calculated Properties of Strontiodresserite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.67 gm/cc
note: Specific Gravity of Strontiodresserite =2.71 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEStrontiodresserite = 21.97 barns/electron
U=PEStrontiodresserite x rElectron Density= 58.68 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Strontiodresserite is Not Radioactive
 

Strontiodresserite Classification

Help on  Dana Class: Dana Class: 16b.02.01.03 (16b)Carbonates - Hydroxyl or Halogen
  (16b.02)where (A)m (B)n (XO3)p Zq � x(H2O), with (m+n):p=3:2
  (16b.02.01)Dundasite Group
 
16b.02.01.01 Dundasite PbAl2(CO3)2(OH)4•(H2O) Pbmm 2/m 2/m 2/m
 
16b.02.01.02 Dresserite BaAl2(CO3)2(OH)4•(H2O) Pbmm 2/m 2/m 2/m
 
16b.02.01.03 Strontiodresserite (Sr,Ca)Al2(CO3)2(OH)4•(H2O) Pbmm 2/m 2/m 2/m
 
16b.02.01.04 Petterdite! PbCr2(CO3)2(OH)4•H2O Pbnm 2/m 2/m 2/m
 
16b.02.01.05 Kochsandorite! CaAl2(CO3)2(OH)4•H2O P nma 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 05.DB.10 05 - CARBONATES (NITRATES)
  05.D - Carbonates with Additional Anions, with H2O
  05.DB -With large and medium-sized cations
 
05.DB.10 Dresserite BaAl2(CO3)2(OH)4•(H2O) Pbmm 2/m 2/m 2/m
 
05.DB.10 Dundasite PbAl2(CO3)2(OH)4•(H2O) Pbmm 2/m 2/m 2/m
 
05.DB.10 Kochsandorite! CaAl2(CO3)2(OH)4•H2O P nma 2/m 2/m 2/m
 
05.DB.10 Strontiodresserite (Sr,Ca)Al2(CO3)2(OH)4•(H2O) Pbmm 2/m 2/m 2/m
 
05.DB.10 Petterdite! PbCr2(CO3)2(OH)4•H2O Pbnm 2/m 2/m 2/m
 

Other Strontiodresserite Information

Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Strontiodresserite :
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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Strontiodresserite

(Sr,Ca)Al2(CO3)2(OH)4•(H2O)
Dana No: 16b.02.01.03 Strunz No: 05.DB.10
Locality:

 

Notes:

 

 
   
 


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