Dachiardite-Ca Mineral Data + Say DACHIARDITE-CA

General Dachiardite-Ca Information

Help on Chemical  Formula: Chemical Formula: (Ca,Na2,K2)5Al10Si38O96·25(H2O)
Help on Composition: Composition: Molecular Weight = 1,792.84 gm
   Cesium      0.82 %  Cs    0.86 % Cs2O
   Potassium   2.01 %  K     2.42 % K2O
   Barium      0.08 %  Ba    0.09 % BaO
   Sodium      0.54 %  Na    0.73 % Na2O
   Strontium   0.59 %  Sr    0.69 % SrO
   Calcium     3.44 %  Ca    4.82 % CaO
   Aluminum    7.31 %  Al   13.82 % Al2O3
   Iron        0.06 %  Fe    0.09 % Fe2O3
   Silicon    29.70 %  Si   63.54 % SiO2
   Hydrogen    1.41 %  H    12.62 % H2O
   Oxygen     54.04 %  O
             ______        ______ 
             100.00 %       99.67 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca1.54K0.92Na0.42Cs0.11Sr0.12Ba0.01Al4.86Fe3+0.02Si18.96O48·12.56(H2O)
Help on Environment: Environment: Hydrothermal zeolite that generally occurs in silica-rich environments in late states of granitic pegmatites and Si-rich basalts. Ca modifier added by zeolite nomenclatrue committee .
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1906
Help on Locality: Locality: Filone della Speranza, Monte Capanne, San Piero di Campo, island of Elba, Tuscany, Italy.. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Antonio D'Achiardi (1839-1902), Professor of Mineralogy, Universitá di Pisa, Italy, who first described the mineral discovered by his son in a granitic pegmatite.
Help on Synonym: Synonym: Achiardite
  Dachiardite
  Svetlozarite - twinned
 

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Dachiardite-Ca Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.4856:1:1.3695
Help on Cell Dimensions: Cell Dimensions: a = 18.64, b = 7.499, c = 10.27, Z = 1; beta = 107.75° V = 1,367.22 Den(Calc)= 2.18
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.204(1), 3.542(1), 1.873(0.75),4.88(0.5), 4.97(0.5), 6.91(0.5), 8.9(0.5),
 

Physical Properties of Dachiardite-Ca

Help on Cleavage: Cleavage: [100] Perfect, [001] Perfect
Help on Color: Color: White, Pink, Orange red.
Help on Density: Density: 2.14 - 2.21, Average = 2.17
Help on Diaphaniety: Diaphaniety: Transparent to translucent
Help on Fracture: Fracture: Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Pseudo Octohedral - Crystals show an octohedral outline.
Help on Habit: Habit: Twinning Common - Crystals are usually twinned.
Help on Hardness: Hardness: 4-4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Vitreous - Silky
Help on Streak: Streak: white
 

Optical Properties of Dachiardite-Ca

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.02 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.018 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2264,KPDmeas= 0.2269,KC= 0.2223
Help on Optical Data: Optical Data: Biaxial (+), a=1.488-1.494, b=1.49-1.496, g=1.494-1.499, bire=0.0050-0.0060, 2V(Calc)=72-80, 2V(Meas)=58-73. Dispersion r > v strong.
 

Calculated Properties of Dachiardite-Ca

Help on Electron Density: Electron Density:

relectron=2.20 gm/cc
note: rDachiardite-Ca =2.18 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.01474
Boson Index = 0.98526
Help on Photoelectric: Photoelectric:

PEDachiardite-Ca = 6.04 barns/electron
U=PEDachiardite-Ca x relectron= 13.26 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 29.16 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Dachiardite-Ca - barely detectable

 

Dachiardite-Ca Classification

Help on  Dana Class: Dana Class: 77.1.6.4 (77)Tectosilicate Zeolite group
  (77.1)true zeolites
  (77.1.6)Mordenite and related species
 
77.1.6.1 Mordenite (Ca,Na2,K2)Al2Si10O24·7(H2O) C mc21 mm2
 
77.1.6.2 Epistilbite CaAl2Si6O16·5(H2O) C1 1
 
77.1.6.3 Maricopaite Pb7Ca2(Si,Al)48O100·32(H2O) Cm2m 2/m 2/m 2/m
 
77.1.6.4 Dachiardite-Ca (Ca,Na2,K2)5Al10Si38O96·25(H2O) C 2/m 2/m
 
77.1.6.5 Dachiardite-Na (Na2,Ca,K2)4Al4Si20O48·13(H2O) C 2/m 2/m
 
77.1.6.6 Ferrierite-Mg (Mg,Na,K)2Mg(Si,Al)18O36·9(H2O) Pnnm 2/m 2/m 2/m
 
77.1.6.6a Ferrierite-K! (K,Na)2Mg(Si,Al)18O36·9(H2O) Pnnm 2/m 2/m 2/m
 
77.1.6.6b Ferrierite-Na! (Na,K)2Mg(Si,Al)18O36·9(H2O) P 21/n 2/m 2/m 2/m
 
77.1.6.7 Boggsite NaCa2(Al5Si19O48)·17(H2O) I mma 2/m 2/m 2/m
 
77.1.6.8 Gottardiite! Na3Mg3Ca5Al19Si117O272·93(H2O) C mca 2/m 2/m 2/m
 
77.1.6.9 Terranovaite! (Na,Ca)8(Si68Al12)O160-29(H2O) C mcm 2/m 2/m 2/m
 
77.1.6.10 Mutinaite! Na3Ca4Si85Al11O192·60(H2O) P nma 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: VIII/J.22-20 VIII - Silicates
  VIII/J - Tectosilicates (network), with zeolite-structure, Bladed Zeolites
  VIII/J.22 - Zeolite group, Ferrierite - Laumontite series
 
VIII/J.22-01 Ferrierite-Na! (Na,K)2Mg(Si,Al)18O36·9(H2O) P 21/n 2/m 2/m 2/m
 
VIII/J.22-03 Ferrierite-K! (K,Na)2Mg(Si,Al)18O36·9(H2O) Pnnm 2/m 2/m 2/m
 
VIII/J.22-05 Ferrierite-Mg (Mg,Na,K)2Mg(Si,Al)18O36·9(H2O) Pnnm 2/m 2/m 2/m
 
VIII/J.22-06 Mutinaite! Na3Ca4Si85Al11O192·60(H2O) P nma 2/m 2/m 2/m
 
VIII/J.22-07 Terranovaite! (Na,Ca)8(Si68Al12)O160-29(H2O) C mcm 2/m 2/m 2/m
 
VIII/J.22-08 Gottardiite! Na3Mg3Ca5Al19Si117O272·93(H2O) C mca 2/m 2/m 2/m
 
VIII/J.22-10 Boggsite NaCa2(Al5Si19O48)·17(H2O) I mma 2/m 2/m 2/m
 
VIII/J.22-15 Dachiardite-Na (Na2,Ca,K2)4Al4Si20O48·13(H2O) C 2/m 2/m
 
VIII/J.22-20 Dachiardite-Ca (Ca,Na2,K2)5Al10Si38O96·25(H2O) C 2/m 2/m
 
VIII/J.22-30 Mordenite (Ca,Na2,K2)Al2Si10O24·7(H2O) C mc21 mm2
 
VIII/J.22-40 Edingtonite BaAl2Si3O10·4(H2O) P 21212 2 2 2
 
VIII/J.22-50 Laumontite CaAl2Si4O12·4(H2O) C 2/m 2/m
 

Other Dachiardite-Ca Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Dachiardite-Ca :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Dachiardite-Ca

(Ca,Na2,K2)5Al10Si38O96·25(H2O)
Dana No: 77.1.6.4 Strunz No: VIII/J.22-20
Locality:

 

Notes:

 

 
   
 
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