Heulandite-Ca Mineral Data

John Betts - Fine Minerals, New York. Dealers of Fine Minerals and Natural Crystal Clusters since 1989. We buy rock collections, we buy gem collections, we buy mineral collections.

[Newest Minerals] [Rare Minerals] [Cabinet Specimens] [About Us] [Image Gallery]
Updated weekly, for the collector, educator, and researcher since 1996
Extensive Inventory of very Rare Minerals. Visa and Mastercard are Welcome

For more than thirty (30) years, Excalibur Mineral Corp. has been providing private collectors, researchers, major universities and museums throughout the world with reliably identified, rare and unusual mineral samples for science an

General Heulandite-Ca Information

Chemical Formula:

(Ca,Na)2-3Al3(Al,Si)2Si13O36•12(H2O)

Composition:

Molecular Weight = 2,825.14 gm

Potassium 0.60 % K 0.72 % K₂O

Barium 0.29 % Ba 0.33 % BaO

Sodium 1.03 % Na 1.38 % Na₂O

Strontium 0.16 % Sr 0.18 % SrO

Calcium 5.06 % Ca 7.09 % CaO

Magnesium 0.01 % Mg 0.01 % MgO

Aluminum 8.95 % Al 16.91 % Al₂O₃

Silicon 26.54 % Si 56.78 % SiO₂

Hydrogen 1.86 % H 16.59 % H₂O

Oxygen 55.51 % O

______ ______

100.00 % 99.99 % = TOTAL OXIDE

Empirical Formula:

Ca_3.57Sr_0.05Ba_0.06Mg_0.01Na_1.26K_0.43Al_9.37Si_26.7O₇₂·26.02(H₂O)

Environment:

Low temperature zeolite found in a wide variety of geologic environments: volcanic rocks, metamorphic rocks, pegmatites, tuffs, and deep-sea sediments.

IMA Status:

Valid Species (Pre-IMA) 1822

Locality:

Glasgow, Strathclyde (Dumbartonshire), Scotland. Link to MinDat.org Location Data.

Name Origin:

Named after the English mineral collector, John Henry Heuland (1778-1856), a British mineral collector and dealer. Ca modifier added by zeolite nomenclature committee.

Name Pronunciation:

Heulandite-Ca + Pronunciation

Synonym:

Beaumontite

Heulandite

Lamellar zeolite

Heulandite-Ca Image

Images:

Heulandite-Ca

Comments: Crystals of heulandite with a green color due to chlorite inclusions.
Location: Malagaon, India. Scale: 5 x 4.5 x 3 cm.
© Isaias Casanova / IC Minerals

Images:

Heulandite-Ca Mordenite

Comments: White, acicular crystals of mordenite in heulandite geode.
Location: Rock Creek, Stevenson, Skamania County, Washington, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Images:

Heulandite-Ca Mordenite

Comments: Pink heulandite crystals up to 15 mm in fibrous white mordenite matrix.
Location: Rats Nest Claim, Challis, Custer Co., Idaho, USA. Scale: 6x6x4 cm.
© John Betts - Fine Minerals

Heulandite-Ca Crystallography

Axial Ratios:

a:b:c =0.9603:1:0.4152

Cell Dimensions:

a = 17.18, b = 17.89, c = 7.428, Z = 1; beta = 116.42° V = 2,044.55 Den(Calc)= 2.29

Crystal System:

MonoclinicSpace Group: C 2/m, Cm, C 2

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.917(1), 2.959(0.9), 8.845(0.8),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Merkle A B , Slaughter M , American Mineralogist , 52 (1967) p.273-276, The crystal structure of heulandite (Ca,Na2)[Al2Si7O18].6H2O

View Additional jPOWD Structure files for Heulandite-Ca
[1] [2] [3] [4] [5] [6] [7]

Physical Properties of Heulandite-Ca

Cleavage:

{010} Perfect

Color:

White, Reddish white, Grayish white, Brownish white, Yellow.

Density:

2.2

Diaphaneity:

Transparent to subtranslucent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Crystalline - Coarse - Occurs as well-formed coarse sized crystals.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

3-3.5 - Calcite-Copper Penny

Luster:

Vitreous - Pearly

Streak:

white

Optical Properties of Heulandite-Ca

Gladstone-Dale:

CI meas= 0.019 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.058 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2159,KPDmeas= 0.2248,KC= 0.2292
Ncalc = 1.5 - 1.52

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-Ca

Electron Density:

Bulk Density (Electron Density)=2.23 gm/cc
note: Specific Gravity of Heulandite-Ca =2.20 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Heulandite-Ca}= 3.32 barns/electron
U=PE_{Heulandite-Ca} x r_electron= 7.41 barns/cc.

Radioactivity:

GRapi = 8.68 (Gamma Ray American Petroleum Institute Units)
Concentration of Heulandite-Ca per GRapi unit = 11.52 (%)

Estimated Radioactivity from Heulandite-Ca - barely detectable

Heulandite-Ca Classification

Dana Class:

77.01.04.01 (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

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-Ca Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Collectors Book of Fluorescent Minerals) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Heulandite-Ca :
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

Search for Heulandite-Ca using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Heulandite-Ca :

B and L Fine Minerals Google Search for Heulandite-Ca
Dakota Matrix Minerals Google Search for Heulandite-Ca
Dan & Diana Weinrich Mineral Auctions Google Search for Heulandite-Ca
Excalibur Mineral Corp. Google Search for Heulandite-Ca
John Betts Fine Minerals Google Search for Heulandite-Ca
McDougall Minerals Google Search for Heulandite-Ca
Mineral News Website Link
Mineral of the Month Club Google Search for Heulandite-Ca
Weinrich Minerals, Inc. Google Search for Heulandite-Ca

Ask about Heulandite-Ca here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Heulandite-Ca Specimen Label here :

Heulandite-Ca

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

Notes: