Heulandite-Na Mineral Data

[Newest Minerals] [Equipment] [Analytical Services] [About Us] [Mineral Gallery] [eBay Store]
See Also: [Diamond Crystals] [Mineral News] [Hudson Institute] [Minerals on CDROM]
Rare Minerals, Meteorites, Equipment and Analytical Services
Excalibur Mineral Company, World leaders in the supply of rare species
Serving the scientific and collector communities since 1974

General Heulandite-Na Information

Chemical Formula:

(Na,Ca)2-3Al3(Al,Si)2Si13O36•12(H2O)

Composition:

Molecular Weight = 2,725.48 gm

Potassium 0.79 % K 0.95 % K₂O

Sodium 3.36 % Na 4.53 % Na₂O

Calcium 2.60 % Ca 3.64 % CaO

Aluminum 7.76 % Al 14.66 % Al₂O₃

Silicon 28.85 % Si 61.73 % SiO₂

Hydrogen 1.61 % H 14.37 % H₂O

Oxygen 55.03 % O

______ ______

100.00 % 99.88 % = TOTAL OXIDE

Empirical Formula:

Na_3.98Ca_1.77K_0.55Al_7.84Si₂₈O₇₂•21.74(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:

Approved IMA 1998 (Dana # Added)

Locality:

Challis, Custer County, Idaho, U.S.A. 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. The Na-dominant member of the heulandite series.

Name Pronunciation:

Heulandite-Na + Pronunciation

Synonym:

Beaumontite

Lamellar zeolite

Heulandite-Na Image

Images:

Heulandite-Na

Comments: Orange tabular crystals of heulandite-Na lining a vug.
Location: Warm Spring Creek, Challis, Custer County, Idaho, USA. Scale: See Image.
© Rruff Database

Heulandite-Na Crystallography

Axial Ratios:

a:b:c =0.9826:1:0.4117

Cell Dimensions:

a = 17.67, b = 17.982, c = 7.404, Z = 1; beta = 116.4° V = 2,107.22 Den(Calc)= 2.15

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

Gunter M E , Armbruster T , Kohler T , Knowles C R , American Mineralogist , 79 (1994) p.675-682, Crystal structure and optical properties of Na- and Pb-exchanged, heulandite-group zeolites, Sample: Na-exchanged, Atomic parameters from ICSD

Physical Properties of Heulandite-Na

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-Na

Gladstone-Dale:

CI meas= 0.004 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.019 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.23,KPDmeas= 0.2248,KC= 0.2257
Ncalc = 1.49 - 1.5

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-Na

Electron Density:

Bulk Density (Electron Density)=2.22 gm/cc
note: Specific Gravity of Heulandite-Na =2.20 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Heulandite-Na}= 1.81 barns/electron
U=PE_{Heulandite-Na} x r_electron= 4.03 barns/cc.

Radioactivity:

GRapi = 11.50 (Gamma Ray American Petroleum Institute Units)
Concentration of Heulandite-Na per GRapi unit = 8.70 (%)

Estimated Radioactivity from Heulandite-Na - barely detectable

Heulandite-Na Classification

Dana Class:

77.01.04.01a (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-Na Information

References:

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

See Also:

Links to other databases for Heulandite-Na :
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
10 - Ruff.Info

Search for Heulandite-Na using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Heulandite-Na :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Heulandite-Na Mineral Data :

Ask about Heulandite-Na 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-Na Specimen Label here :

Heulandite-Na

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

Notes: