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Heulandite-K Mineral Data

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General Heulandite-K Information

Help on Chemical  Formula: Chemical Formula: (K,Na,Ca)2-3Al3(Al,Si)2Si13O36•12(H2O)
Help on Composition: Composition: Molecular Weight = 2,900.18 gm
   Potassium   3.24 %  K     3.90 % K2O
   Barium      0.57 %  Ba    0.63 % BaO
   Sodium      0.76 %  Na    1.03 % Na2O
   Strontium   1.69 %  Sr    2.00 % SrO
   Calcium     2.27 %  Ca    3.17 % CaO
   Magnesium   0.54 %  Mg    0.89 % MgO
   Aluminum    8.45 %  Al   15.96 % Al2O3
   Iron        1.08 %  Fe    1.54 % Fe2O3
   Silicon    25.64 %  Si   54.86 % SiO2
   Hydrogen    1.80 %  H    16.05 % H2O
   Oxygen     53.98 %  O
             ______        ______ 
             100.00 %      100.03 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K2.4Na0.96Ca1.64Mg0.64Sr0.56Ba0.12Al9.08Fe3+0.56Si26.48O72�25.84(H2O)
Help on Environment: Environment: Low temperature zeolite found in a wide variety of geologic environments: volcanic rocks, metamorphic rocks, pegmatites, tuffs, and deep-sea sediments.
Help on IMA Status: IMA Status: Approved IMA 1998 (Dana # Added)
Help on Locality: Locality: Albero Bassi, Vicenza, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the English mineral collector, John Henry Heuland (1778-1856), a British mineral collector and dealer. The K-dominant member of the heulandite series.
Help on Name Pronunciation: Name Pronunciation: Heulandite-K + Pronunciation Say HEULANDITE-K
Help on Synonym: Synonym: Beaumontite
  Lamellar zeolite
 

Heulandite-K Image

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  Heulandite-K

Comments: Coating of orange heulandite-K crystals on matix.
Location: Albero Bassi, Vicenza, Veneto, Italy. Scale: See Image.
© Rruff Database

Heulandite-K Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9821:1:0.4261
Help on Cell Dimensions: Cell Dimensions: a = 17.498, b = 17.816, c = 7.592, Z = 1; beta = 116.07° V = 2,125.96 Den(Calc)= 2.27
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m, Cm, C 2
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.917(1), 2.959(0.9), 8.845(0.8),
 

Physical Properties of Heulandite-K

Help on Cleavage: Cleavage: {010} Perfect
Help on Color: Color: White, Reddish white, Grayish white, Brownish white, Yellow.
Help on Density: Density: 2.2
Help on Diaphaneity: Diaphaneity: Transparent to subtranslucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Crystalline - Coarse - Occurs as well-formed coarse sized crystals.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 3-3.5 - Calcite-Copper Penny
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: white
 

Optical Properties of Heulandite-K

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.016 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.046 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2178,KPDmeas= 0.2248,KC= 0.2283
Ncalc = 1.5 - 1.52
Help on Optical Data: Optical Data: Biaxial (+), a=1.476-1.506, b=1.479-1.51, g=1.479-1.517, bire=0.0030-0.0110, 2V(Calc)=0-76, 2V(Meas)=10-48. Dispersion r > v.
 

Calculated Properties of Heulandite-K

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.22 gm/cc
note: Specific Gravity of Heulandite-K =2.20 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEHeulandite-K = 6.23 barns/electron
U=PEHeulandite-K x relectron= 13.83 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 47.06 (Gamma Ray American Petroleum Institute Units)
Concentration of Heulandite-K per GRapi unit = 2.12 (%)

Estimated Radioactivity from Heulandite-K - barely detectable

 

Heulandite-K Classification

Help on  Dana Class: Dana Class: 77.01.04.01b (77)Tectosilicate Zeolite group
  (77.01)true zeolites
  (77.01.04)Heulandite and related species
 
77.01.04.01 Heulandite-Ca (Ca,Na)2-3Al3(Al,Si)2Si13O36•12(H2O) C 2/m, Cm, C 2 Mono
 
77.01.04.01a Heulandite-Na! (Na,Ca)2-3Al3(Al,Si)2Si13O36•12(H2O) C 2/m, Cm, C 2 Mono
 
77.01.04.01b Heulandite-K! (K,Na,Ca)2-3Al3(Al,Si)2Si13O36•12(H2O) C 2/m, Cm, C 2 2/m
 
77.01.04.01c Heulandite-Sr! (Sr,Na,Ca)2-3Al3(Al,Si)2Si13O36•12(H2O) C 2/m, Cm, C 2 Mono
 
77.01.04.01d Heulandite-Ba! (Ba,Ca,K,Na,Sr)5Al9Si27O72•22(H2O) C 2/m 2/m
 
77.01.04.02 Clinoptilolite-K (Na,K,Ca)2-3Al3(Al,Si)2Si13O36•12(H2O) C 2/m, C 2, Cm Mono
 
77.01.04.02a Clinoptilolite-Na! (Na,K,Ca)2-3Al3(Al,Si)2Si13O36•12(H2O) C 2/m, C 2, Cm Mono
 
77.01.04.02b Clinoptilolite-Ca! (Ca,Na,K)2-3Al3(Al,Si)2Si13O36•12(H2O) C 2/m 2/m
 
77.01.04.03 Stilbite-Ca NaCa4[Al8Si28O72]•n(H2O)(n=28-32) C 2/m 2/m
 
77.01.04.03a Stilbite-Na! Na3Ca3[Al8Si28O72]•n(H2O)(n=28-32) C 2/m 2/m
 
77.01.04.04 Stellerite CaAl2Si7O18•7(H2O) F mmm 2/m 2/m 2/m
 
77.01.04.05 Barrerite (Na,K,Ca)2Al2Si7O18•6(H2O) Amma or Ammm 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.GE.05 09 - SILICATES (Germanates)
  09.G - Tektosilicates with Zeolitic H2O
  09.GE -Chains of T10O20 Tetrahedra
 
09.GE.05 Clinoptilolite-Na! (Na,K,Ca)2-3Al3(Al,Si)2Si13O36•12(H2O) C 2/m, C 2, Cm Mono
 
09.GE.05 Clinoptilolite-K (Na,K,Ca)2-3Al3(Al,Si)2Si13O36•12(H2O) C 2/m, C 2, Cm Mono
 
09.GE.05 Clinoptilolite-Ca! (Ca,Na,K)2-3Al3(Al,Si)2Si13O36•12(H2O) C 2/m 2/m
 
09.GE.05 Heulandite-Ca (Ca,Na)2-3Al3(Al,Si)2Si13O36•12(H2O) C 2/m, Cm, C 2 Mono
 
09.GE.05 Heulandite-K! (K,Na,Ca)2-3Al3(Al,Si)2Si13O36•12(H2O) C 2/m, Cm, C 2 2/m
 
09.GE.05 Heulandite-Na! (Na,Ca)2-3Al3(Al,Si)2Si13O36•12(H2O) C 2/m, Cm, C 2 Mono
 
09.GE.05 Heulandite-Sr! (Sr,Na,Ca)2-3Al3(Al,Si)2Si13O36•12(H2O) C 2/m, Cm, C 2 Mono
 
09.GE.05 Heulandite-Ba! (Ba,Ca,K,Na,Sr)5Al9Si27O72•22(H2O) C 2/m 2/m
 

Other Heulandite-K Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Collectors Book of Fluorescent Minerals) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Heulandite-K :
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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Print or Cut-and-Paste your Heulandite-K Specimen Label here :

Heulandite-K

(K,Na,Ca)2-3Al3(Al,Si)2Si13O36•12(H2O)
Dana No: 77.01.04.01b Strunz No: 09.GE.05
Locality:

 

Notes:

 

 
   
 


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