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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 (64)
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}
Space Group Setting:P63/mmc
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

Other Languages:
Russian: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.
    (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
      • Montérégie
        • Lajemmerais RCM
          • Varennes & St-Amable
            • Saint-Amable sill
    		Horváth Collection - confirmed by XRD & microprobe
        • Rouville RCM
          • 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.
    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
            • Alluaiv Mt
              • Umbozero mine
    		Pavel M. Kartashov analytical data
    UK
     
    • Northern Ireland
      • Co. Antrim
        • Larne
    USA
     
    • California
      • Kern Co.
        • Kramer District
          • Boron
            • Kramer Borate deposit
              • U.S. Borax Mine (Pacific West Coast Borax Mine; Pacific Coast Borax Co. Mine; Boron Mine; U.S. Borax and Chemical Corp. Mine; Kramer Mine; Baker Mine)
                • Baker mine
    		Am Min 90:1186-1191
    • Oregon
      • Grant Co.
        • North Fork John Day River
    Mineral and/or Locality
    Google
     
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 14th Nov 2009 15:41:22