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Gmelinite-Na

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Devils Backbone, North Fork John Day River, Grant Co., Oregon, USA
© DM 06

Show Gmelinite-Na Photos (35)
Formula:
(Na
 
2
,Ca)[Al
 
2
Si
 
4
O
 
12
] · 6H
 
2
O
System:HexagonalColour:Colorles, white, reddish ...
Lustre:VitreousHardness:4½
Name:Named after the German mineralogist and chemist, Christian Gottlob Gmelin (1792-1860) of Tübingen, Germany.


The sodium-dominant member of the Gmelinite series.

Classification of Gmelinite-Na

IMA status:Approved
Strunz 8th edition ID:8/J.26-50
Nickel-Strunz 10th (pending) edition ID:9.GD.05

9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
D : Chains of 6-membered rings – tabular zeolites
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Type Occurrence of Gmelinite-Na

Type Locality:Nero Mt., San Pietro, Montecchio Maggiore, Vicenza Province, Veneto, Italy

Occurrences of Gmelinite-Na

Geological Setting:In basalts and pegmatites.

Physical Properties of Gmelinite-Na

Lustre:Vitreous
Diaphaneity (Transparency):Transparent, Translucent, Opaque
Colour:Colorles, white, reddish white, salmon-red, yellowish, greenish white
Hardness (Mohs):4½
Tenacity:Brittle
Cleavage:Distinct/Good
Distinct on {1010}
Parting:{0001}
Fracture:Irregular/Uneven
Density (measured):2.02 - 2.17 g/cm3
Density (calculated):2.098 g/cm3

Crystallography of Gmelinite-Na

Crystal System:Hexagonal
Class (H-M):6/mmm (6/m 2/m 2/m) - Dihexagonal Dipyramidal
Space Group:P63/mmc (P63/m 2/m 2/c)
Cell Parameters:a = 13.78(2) Å, c = 10.03(5) Å
Ratio:a:c = 1 : 0.728
Unit Cell Volume:V 1,649.42 ų (Calculated from Unit Cell)
Z:4
Morphology:Pyrimidal, tabular, rhombohedral
Twinning:Pernetration common on {1011}
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Horizontal Axis: ° to ° Vertical Axis: % Source Data: Filtered Data: Peaks:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Gmelinite-Na

Type:Uniaxial (+/-)
RI values: nω = 1.476 - 1.494 nε = 1.474 - 1.480
Maximum Birefringence:δ = 0.002 - 0.014

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Comments:May be anomalously biaxial.

Chemical Properties of Gmelinite-Na

Formula:
(Na
 
2
,Ca)[Al
 
2
Si
 
4
O
 
12
] · 6H
 
2
O
Essential elements:Al, H, Na, O, Si
All elements listed in formula:Al, Ca, H, Na, O, Si

Relationship of Gmelinite-Na to other Species

Related Minerals - Nickel-Strunz Grouping):
9.GD.05Gmelinite-Ca
(Ca,Na
 
2
)[Al
 
2
Si
 
4
O
 
12
] · 6H
 
2
O
9.GD.05Gmelinite-K
(K
 
2
,Na
 
2
,Ca)[Al
 
2
Si
 
4
O
 
12
] · 6H
 
2
O
9.GD.10Willhendersonite
KCa[Al
 
3
Si
 
3
O
 
12
] · 5H
 
2
O
9.GD.10Chabazite-Ca
(Ca,K
 
2
,Na
 
2
)
 
2
[Al
 
2
Si
 
4
O
 
12
]
 
2
 · 12H
 
2
O
9.GD.10Chabazite-K
(K
 
2
,Ca,Na
 
2
,Sr,Mg)
 
2
[Al
 
2
Si
 
4
O
 
12
]
 
2
 · 12H
 
2
O
9.GD.10Chabazite-Na
(Na
 
2
,K
 
2
,Ca,Sr,Mg)
 
2
[Al
 
2
Si
 
4
O
 
12
]
 
2
 · 12H
 
2
O
9.GD.10Chabazite-Sr
Sr
 
2
[Al
 
2
Si
 
4
O
 
12
]
 
2
 · 12H
 
2
O
9.GD.15Lévyne-Ca
(Ca,Na
 
2
,K
 
2
)[Al
 
2
Si
 
4
O
 
12
] · 6H
 
2
O
9.GD.15Lévyne-Na
(Na
 
2
,Ca,K
 
2
)[Al
 
2
Si
 
4
O
 
12
] · 6H
 
2
O
9.GD.20Bellbergite
(K,Ba,Sr)
 
2
Sr
 
2
Ca
 
2
(Ca,Na)
 
4
[Al
 
3
Si
 
3
O
 
12
]
 
6
 · 30H
 
2
O
9.GD.20Erionite-Ca
(Ca,K
 
2
,Na
 
2
)
 
2
[Al
 
4
Si
 
14
O
 
36
] · 15H
 
2
O
9.GD.20Erionite-K
(K
 
2
,Ca,Na
 
2
)
 
2
[Al
 
4
Si
 
14
O
 
36
] · 15H
 
2
O
9.GD.20Erionite-Na
(Na
 
2
,K
 
2
,Ca)
 
2
[Al
 
4
Si
 
14
O
 
36
] · 15H
 
2
O
9.GD.25Offretite
KCaMgAl
 
5
Si
 
13
O
 
36
·16H
 
2
O or near
9.GD.25Wenkite
(Ba,K)
 
4
(Ca,Na)
 
6
[(SO
 
4
)
 
3
|(Si,Al)
 
20
O
 
39
(OH)
 
2
] · 0.5H
 
2
O
9.GD.30Faujasite-Ca
(Ca,Na
 
2
,Mg)
 
3.5
[Al
 
7
Si
 
17
O
 
48
] · 32H
 
2
O
9.GD.30Faujasite-Mg
(Mg,Na
 
2
,Ca)
 
3.5
[Al
 
7
Si
 
17
O
 
48
] · 32H
 
2
O
9.GD.30Faujasite-Na
(Na
 
2
,Ca,Mg)
 
3.5
[Al
 
7
Si
 
17
O
 
48
] · 32H
 
2
O
9.GD.35Maricopaite
Pb
 
7
Ca
 
2
(Si,Al)
 
48
O
 
100
·32H
 
2
O
9.GD.35Mordenite
(Na
 
2
,Ca,K
 
2
)Al
 
2
Si
 
10
O
 
24
·7H
 
2
O
9.GD.40Dachiardite-Ca
(Ca,Na
 
2
,K
 
2
)
 
5
Al
 
10
Si
 
38
O
 
96
·25H
 
2
O
9.GD.40Dachiardite-Na
(Na
 
2
,Ca,K
 
2
)
 
5
Al
 
10
Si
 
38
O
 
96
·25H
 
2
O
9.GD.45Epistilbite
CaAl
 
2
Si
 
6
O
 
16
·5H
 
2
O
9.GD.50Ferrierite-K
(K
 
2
,Na
 
2
,Mg,Ca)
 
3-5
Mg[Al
 
5-7
Si
 
27.5-31
O
 
72
]·18H
 
2
O
9.GD.50Ferrierite-Mg
(Mg,Na
 
2
,K
 
2
,Ca)
 
3-5
Mg[Al
 
5-7
Si
 
27.5-31
O
 
72
]·18H
 
2
O
9.GD.50Ferrierite-Na
(Na
 
2
,K
 
2
,Mg,Ca)
 
3-5
Mg[Al
 
5-7
Si
 
27.5-31
O
 
72
]·18H
 
2
O
9.GD.55Bikitaite
LiAlSi
 
2
O
 
6
·H
 
2
O

Other Names for Gmelinite-Na

Russian names:
Гмелинит-Na

Other Information

Electrical:Piezeoelectric
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 Gmelinite-Na

Reference List:Neues Jahrbuch für Mineralogie, Monatshefte (1978): 310-324.

Neues Jahrbuch für Mineralogie, Monatshefte (1982): 145-155.

Internet Links for Gmelinite-Na

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    Localities for Gmelinite-Na

    Hide Locality List
    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.
    Australia
     
    • Tasmania
      • Moina District (Middlesex District)
    		Sutherland, F. & Bottrill, R.(2004): Zeolites of western Tasmania. Australian Jornal of Mineralogy 10:2 pp 59-72
    • Victoria
      • Flinders
    		Tschernich, R. (1992): Zeolites of the World, p.49
    Min Rec 17:6 p377-379
    Canada
     
    • Nova Scotia
      • Cumberland Co.
        • Bay of Fundy
    		Tschernich, R. (1992): Zeolites of the World, p.201,204
    • Québec
      • Rouville Co.
        • Mont Saint-Hilaire
    		Tschernich, R. (1992): Zeolites of the World, p.52,205, Horváth, L and Gault, R.A. (1990), The mineralogy of Mont Saint-Hilaire Quebec. Mineralogical Record: 21: 284-359.
      • Verchères Co.
        • Varennes & St-Amable
          • Saint-Amable sill
    		Horváth Collection - confirmed by XRD & microprobe
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Ústí Region
        • Děčín (Tetschen)
    		No reference listed
    Germany
     
    • Lower Saxony
      • Harz Mts
        • St Andreasberg District
          • St Andreasberg
    		No reference listed
    No reference listed
    Hungary
     
    • Veszprém Co.
      • Tapolcai Basin
        • Zalahaláp
    		GEODA, 2000
    Italy
     
    • Veneto
      • Vicenza Province
        • Montecchio Maggiore
          • San Pietro
    		Edinburgh J. Sci. (1825) 2, 262; Can. Mineral. (1997) 35, 1571
    Japan
     
    • Honshu Island
      • Chubu Region
        • Niigata Prefecture
          • Sado Island
    		Chiba et al (1995) Bulletin of the National Science Museum, 21, 61-69.
    • Kyushu Island
      • Fukuoka prefecture
    		Kuwano, N. & Matsueda, H. (1982) Geoscience Magazine, 33, 79-84.
    Russia
     
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
    		www.koeln.netsurf.de/~w.steffens/lovo.htm
    UK
     
    • Northern Ireland
      • Co. Antrim
        • Larne
    USA
     
    • California
      • Kern Co.
        • Kramer District
          • Boron
            • U.S. Borax Mine
    		Am Min 90:1186-1191
    • Oregon
      • Grant Co.
        • North Fork John Day River
    Mineral and/or Locality
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