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Heulandite-Na

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Formula:
(Na,Ca,K)6(Si,Al)36O72 · 22H2O
System:
Monoclinic
Colour:
White, Colorless, Red, ...
Lustre:
Vitreous, Pearly
Hardness:
3 - 3½
Name:
Named in 1822 by Henry James Brooke in honor of Johann Heinrich "John Henry" Heuland [March 21, 1778 Beyreuth, Germany - November 16, 1856 Hastings, Sussex, England, UK], a mineral collector and mineral dealer living in England and for the suffix indicating dominant Na. Despite having an international reputaion, there are no known images of Henry Heuland.

Classification of Heulandite-Na

Approved
9.GE.05

9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
E : Chains of T10O20 Tetrahedra
Dana 7th ed.:
77.1.4.1

Physical Properties of Heulandite-Na

Vitreous, Pearly
Diaphaneity (Transparency):
Transparent
Colour:
White, Colorless, Red, Yellow, Brown, Green
Streak:
White
Hardness (Mohs):
3 - 3½
Tenacity:
Brittle
Cleavage:
Perfect
Perfect on the {010}
Density:
2.2 g/cm3 (Measured)    2.12 g/cm3 (Calculated)

Optical Data of Heulandite-Na

Type:
Biaxial (+)
RI values:
nα = 1.476 - 1.506 nβ = 1.479 - 1.510 nγ = 1.479 - 1.517
2V:
Measured: 10° to 48°
Max Birefringence:
δ = 0.003 - 0.011
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r > v

Chemical Properties of Heulandite-Na

Formula:
(Na,Ca,K)6(Si,Al)36O72 · 22H2O
Elements listed in formula:

Crystallography of Heulandite-Na

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Cell Parameters:
a = 7.46 Å, b = 17.84 Å, c = 15.88 Å
β = 91.433°
Ratio:
a:b:c = 0.418 : 1 : 0.89
Unit Cell Volume:
V 2 ų
Z:
2
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Type Occurrence of Heulandite-Na

Relationship of Heulandite-Na to other Species

Series:
Forms a series with Clinoptilolite-Na (see here)
Other Members of Group:
Heulandite-Ba(Ba,Ca,K)5(Si27Al9)O72 · 22H2O
Heulandite-Ca(Ca,Na)5(Si27Al9)O72 · 26H2O
Heulandite-K(K,Ca,Na)5(Si27Al9)O72 · 26H2O
Heulandite-Sr(Sr,Na,Ca)5(Si27Al9)O72 · 24H2O
9.GE.05Clinoptilolite-CaCa3(Si30Al6)O72 · 20H2O
9.GE.05Clinoptilolite-KK6(Si30Al6)O72 · 20H2O
9.GE.05Clinoptilolite-NaNa6(Si30Al6)O72 · 20H2O
9.GE.05Heulandite-Ca(Ca,Na,K)5(Si27Al9)O72 · 26H2O
9.GE.05Heulandite-K(K,Ca,Na)5(Si27Al9)O72 · 26H2O
9.GE.05Heulandite-Sr(Sr,Ca,Na)5(Si27Al9)O72 · 24H2O
9.GE.05Heulandite-Ba(Ba,Ca,K)5(Si27Al9)O72 · 22H2O
9.GE.10Stilbite-CaNaCa4(Si27Al9)O72 · 28H2O
9.GE.10Stilbite-NaNa9(Si27Al9)O72 · 28H2O
9.GE.15BarreriteNa2(Al2Si7)O18 · 6H2O
9.GE.15StelleriteCa4(Si28Al8)O72 · 28H2O
9.GE.20Brewsterite-BaBa(Al2Si6)O16 · 5H2O
9.GE.20Brewsterite-SrSr(Al2Si6)O16 · 5H2O
77.1.4.1Heulandite-Ca(Ca,Na,K)5(Si27Al9)O72 · 26H2O
77.1.4.1Heulandite-K(K,Ca,Na)5(Si27Al9)O72 · 26H2O
77.1.4.1Heulandite-Sr(Sr,Ca,Na)5(Si27Al9)O72 · 24H2O
77.1.4.3Stilbite-CaNaCa4(Si27Al9)O72 · 28H2O
77.1.4.3Stilbite-NaNa9(Si27Al9)O72 · 28H2O
77.1.4.5BarreriteNa2(Al2Si7)O18 · 6H2O

Other Names for Heulandite-Na

Name in Other Languages:

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Heulandite-Na

Reference List:
Merkle, A.B., and M. Slaughter (1968), Determination and refinement of the structure of heulandite: American Mineralogist: 53: 1120-1138.

Alberti, A. (1972), On the crystal structure of the zeolite heulandite: Tschermaks Mineralogische und Petrographische Mitteilungen: 18: 129-146.

Fahri Esenli and Isik Kumbasar (1998) X-Ray Diffraction Intensity Ratios I(111)//(311) of Natural Heulandites and Clinoptilolites, Clays and Clay Minerals, Vol. 46, No. 6, 679-686, 1998.

Comodi, P., G.D. Gatta, & P.F. Zanazzi (2001), High-pressure structural behavior of heulandite: European Journal of Mineralogy: 15: 247-255.

Internet Links for Heulandite-Na

mindat.org URL:
https://www.mindat.org/min-6990.html
Please feel free to link to this page.

Localities for Heulandite-Na

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Austria
 
  • Upper Austria
    • Linz-Land
      • Traun
        • Pucking
Kolitsch, U. (2015): 1935) Almandin, Aragonit, Baryt, Heulandit-Na, Klinoptilolith-Na, ein Magnesiochromit-Spinell-Mischkristall und Schwefel vom Traunkraftwerk Pucking, Oberösterreich. Pp. 241-243 in Niedermayr, G. et al. (2015): Neue Mineralfunde aus Österreich LXIV. Carinthia II, 205./125., 207-280.
Greece
 
  • Aegean Islands Department (Aiyaíon)
    • Kykládes Prefecture
      • Cyclade Islands (Cyclades; Kikladhes; Nomos Kikladhon)
        • Tinos Island
          • Panormos Bay
Gunnar Farber specimens
Italy
 
  • Piedmont
    • Verbano-Cusio-Ossola Province
      • Omegna
- Albertini,C. (2000) : Ritrovamenti nel Rio Inferno, Brughiere di Omegna. Prima segnalazione nel granito di Baveno : uranofane-beta - Rivista Mineralogica Italiana, Milano, XXIV, 2, 88-92.
  • Veneto
    • Vicenza Province
      • Gambellara
        • S. Marco hill
Boscardin M.,Daleffe A.,Rocchetti I., Zordan A. (2011) " Minerali del Vicentino - Aggiornamenti, località e nuove determinazioni " Museo di Archeologia e Scienze Naturali “G. Zannato” – Montecchio Maggiore (Vicenza), pp.183
      • Monte di Malo
        • Contrada Vanzi
Carbonin, S., Manzone, A., Boscardin M., Pegoraro, S. (2003): Zeoliti del Vicentino: caratterizzazioni chimiche e ottiche nella serie dell'heulandite. Rivista Mineralogica Italiana, 4, 186-195.
      • Montecchio Maggiore
        • San Pietro
Carbonin
Japan
 
  • Kyushu Region
    • Fukuoka prefecture
      • Munakata
Ueno et al (1982) Sanko-Gakkai Kou'en-Youshi, 149.
  • Tokyo Metropolis
    • Ogasawara Islands
      • Chichijima Group
Mineralogical Journal Vol. 11 (1982) , No. 1 pp1-14
Namibia
 
  • Khomas Region
    • Windhoek District
      • Aris
Uwe Kolitsch (SXRD and EDS analyses); Kolitsch, U., Blaß, G., Jahn, S., Cámara, F., von Bezing, L., Wartha, R. R., Tremmel, G., Sturla, M., Cerea, P., Skebo, M. and Ciriotti, M. E. (2016): Aris - mineralogy of the famous alkaline phonolite. AMI - Associazione Micromineralogica Italiana, Cremona, Italy, 95 pp.
Norway
 
  • Vestfold
    • Holmestrand
Nordrum, F. S., Larsen, A.O. & Erambert, M. (2005): Minerals of the heulandite series in Norway- additional data and summary. Norsk Bergverksmuseum Skrift, 30: 98-112
Russia
 
  • Eastern-Siberian Region
    • Transbaikalia (Zabaykalye)
      • Chitinskaya Oblast'
P.M. Kartashov data
  • Far-Eastern Region
    • Kamchatka Oblast'
Pavel M. Kartashov analytical data (1984)
USA
 
  • California
    • Kern Co.
      • Kramer District (Kramer Borate District)
        • Boron
          • Kramer Borate deposit
            • U.S. Borax Mine (Pacific West Coast Borax; Pacific Coast Borax Co.; Boron Mine; Boron open pit; U.S. Borax and Chemical Corporation Mine; Kramer Mine; Kramer pit; Baker Mine)
Am Min 90:1186-1191; Tschernich, R. (1992): Zeolites of the World, 64; Clays and Clay Minerals, Vol. 36, No. 2, 131-136, 1988
  • Colorado
    • Mineral Co.
      • San Juan Mts
        • Wolf Creek Pass
Patrick haynes. ID via Tony Kampf
  • Idaho
    • Custer Co.
      • Bay Horse District
        • Challis
Ream, Lanny R. 2004. Idaho Minerals, 2nd edition, Revised and Updated
Ream, Lanny R. 2004. Idaho Minerals, 2nd edition, Revised and Updated
Fluorescent Zeolites and Associated Minerals from the Rat's Nest Mine, Challis, Idaho: John Cornish, Jan 7, 2005
Tschernich, R. (1992): Zeolites of the World, p.349
      • Warm Spring Creek District
Tom Loomis specimen
Mineral and/or Locality  
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