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Heulandite-Ba

Big Photo

Northern Ravnås Prospect, Southern Vinoren mines, Kongsberg silver mines, Flesberg, Buskerud, Norway
© OT. Ljostad

Formula:
(Ba,Ca,K,Na,Sr)
 
5
Al
 
9
Si
 
27
O
 
72
·22H
 
2
O
System:MonoclinicColour:Colourless to white, ...
Hardness:3½
Name:Named after the English mineral collector, John Henry Heuland (1778-1856), a British mineral collector and dealer. The Barium-dominant member of the heulandite series.


The barium analogue of Heulandite-Ca, Heulandite-K, Heulandite-Na, and Heulandite-Sr.

Classification of Heulandite-Ba

IMA status:Approved 2003
Nickel-Strunz 10th (pending) edition ID:9.GE.05

9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
E : Chains of T10O20 Tetrahedra
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Type Occurrence of Heulandite-Ba

Type Locality:Northern Ravnås Prospect, Southern Vinoren mines, Kongsberg silver mines, Flesberg, Buskerud, Norway

Physical Properties of Heulandite-Ba

Lustre:Vitreous, Pearly
Diaphaneity (Transparency):Transparent, Translucent
Colour:Colourless to white, Pale yellowish-white, Pale beige
Streak:White
Hardness (Mohs):3½
Cleavage:Perfect
Perfect on the {010}
Fracture:Irregular/Uneven, Sub-Conchoidal
Density (measured):2.35 g/cm3
Density (calculated):2.35 g/cm3

Crystallography of Heulandite-Ba

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:B2/m (B1 1 2/m) [C2/m] {C1 2/m 1}
Cell Parameters:a = 17.738Å, b = 17.856Å, c = 7.419Å
β = 116.55°
Ratio:a:b:c = 0.993 : 1 : 0.415
Unit Cell Volume:V 2,102.02 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
7.94 (66)
5.12 (59)
4.65 (66)
3.978 (97)
3.181 (56)
2.973 (100)

Optical Data of Heulandite-Ba

Type:Biaxial (+)
RI values: nα = 1.506 nβ = 1.506 nγ = 1.515
2V:Measured: 38° , Calculated: 34°
Maximum Birefringence:δ = 0.009

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low

Chemical Properties of Heulandite-Ba

Formula:
(Ba,Ca,K,Na,Sr)
 
5
Al
 
9
Si
 
27
O
 
72
·22H
 
2
O
All elements listed in formula:Al, Ba, Ca, H, K, Na, O, Si, Sr

Relationship of Heulandite-Ba to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.GE.05Clinoptilolite-Ca
(Ca,Na,K)
 
2-3
Al
 
3
(Al,Si)
 
2
Si
 
13
O
 
36
·12H
 
2
O
9.GE.05Clinoptilolite-K
(K,Na,Ca)
 
2-3
Al
 
3
(Al,Si)
 
2
Si
 
13
O
 
36
·12H
 
2
O
9.GE.05Clinoptilolite-Na
(Na,K,Ca)
 
2-3
Al
 
3
(Al,Si)
 
2
Si
 
13
O
 
36
·12H
 
2
O
9.GE.05Heulandite-Ca
(Ca,Na)
 
2-3
Al
 
3
(Al,Si)
 
2
Si
 
13
O
 
36
·12H
 
2
O
9.GE.05Heulandite-K
(K,Na,Ca)
 
2-3
Al
 
3
(Al,Si)
 
2
Si
 
13
O
 
36
·12H
 
2
O
9.GE.05Heulandite-Na
(Na,Ca)
 
2-3
Al
 
3
(Al,Si)
 
2
Si
 
13
O
 
36
·12H
 
2
O
9.GE.05Heulandite-Sr
(Sr,Na,Ca)
 
2-3
Al
 
3
(Al,Si)
 
2
Si
 
13
O
 
36
·12H
 
2
O
9.GE.10Stilbite-Ca
NaCa
 
4
[Al
 
9
Si
 
27
O
 
72
] · nH
 
2
O
9.GE.10Stilbite-Na
Na
 
3
Ca
 
3
[Al
 
8
Si
 
28
O
 
72
]·nH
 
2
O
9.GE.15Barrerite
(Na,K,Ca
 
0.5
)
 
2
[Al
 
2
Si
 
7
O
 
18
] · 7H
 
2
O
9.GE.15Stellerite
Ca[Al
 
2
Si
 
7
O
 
18
] · 7H
 
2
O
9.GE.20Brewsterite-Ba
(Ba,Sr)[Al
 
2
Si
 
6
O
 
16
] · 5H
 
2
O
9.GE.20Brewsterite-Sr
(Sr,Ba,Ca)[Al
 
2
Si
 
6
O
 
16
] · 5H
 
2
O

Other Names for Heulandite-Ba

Synonyms:
IMA2003-001
Other Languages:
Russian:Гейландит-Ba

Other Information

Health Warning: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-Ba

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.

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

Larsen, Alf Olav; Nordrum, Fred Steinar; Döbelin, Nicola; Armbruster, Thomas; Petersen, Ole V.; Erambert, Muriel (2005), Heulandite-Ba, a new zeolite species from Norway: European Journal of Mineralogy, January 2005, vol. 17, no. 1, pp. 143-154(12).

Articles/Blogs about Heulandite-Ba

Internet Links for Heulandite-Ba

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    Localities for Heulandite-Ba

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    The 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.
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    (TL) indicates type locality. ? 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.
    Canada
     
    • Alberta
    		Tschernich, R. (1992): Zeolites of the World, p.254
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Pardubice Region
    		Prachař, I.: Současný stav výskytu nerostů ve Chvaleticích. Acta musei Reginaehradecensis, série A: vědy přírodní, 1981, roč. XVI., s. 99-102.
    Japan
     
    • Shikoku Island
      • Kochi Prefecture
    		Minakawa et al (2002) Strontian and Barian heulandite in sandy stone from the Shimanto formation and Izumi formation, Shikoku. (2002 annual meeting of JAMPEG, 282)
    Norway
     
    • Buskerud
      • Flesberg
        • Kongsberg silver mines
          • Southern Vinoren mines
    		European Journal of Mineralogy, January 2005, vol. 17, no. 1, pp. 143-154(12), Larsen Alf Olav; Nordrum Fred Steinar; Döbelin Nicola; Armbruster Thomas; Petersen Ole V.; Erambert
      • Kongsberg
        • Kongsberg Silver Mines
          • Overbergets Mine-field
    		Am Min 90:1945-1946
    Am Min 90:1945-1946
    • Oppland
      • Sel
    		Am Min 90:1945-1946
    Mineral and/or Locality
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