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Wegscheiderite

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Formula:
Na
 
5
H
 
3
(CO
 
3
)
 
4
System:TriclinicColour:Colourless
Lustre:VitreousHardness:2½ - 3
Name:
Named after Rudolf Wegscheider (1859-1935), Austrian chemist who, in 1913, first produced the synthetic compound.
This page provides mineralogical data about Wegscheiderite.

Classification of Wegscheiderite

IMA status:Approved
Strunz 8th edition ID:5/B.01-60
Nickel-Strunz 10th (pending) edition ID:5.AA.30

5 : CARBONATES (NITRATES)
A : Carbonates without additional anions, without H2O
A : Alkali carbonates
Dana 8th edition ID:13.1.6.1

13 : ACID CARBONATES
1 : Miscellaneous
Hey's CIM Ref.:11.1.4

11 : Carbonates
1 : Carbonates of the alkali metals and ammonium
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Type Occurrence of Wegscheiderite

Type Locality:Perkins Well No. 1, Green River Formation, Sweetwater Co., Wyoming, USA
Place of Conservation of Type Material:Smithsonian 117710
Year of Discovery:1961
Geological Setting of type material:Lacustrine deposits

Physical Properties of Wegscheiderite

Lustre:Vitreous
Diaphaneity (Transparency):Translucent
Colour:Colourless
Hardness (Mohs):2½ - 3
Cleavage:Distinct/Good
Distinct prismatic cleavage
Fracture:Irregular/Uneven, Sub-Conchoidal
Density (measured):2.341 g/cm3
Density (calculated):2.334 g/cm3

Crystallography of Wegscheiderite

Crystal System:Triclinic
Class (H-M):1 - Pinacoidal
Space Group:P1
Cell Parameters:a = 10.04(3) Å, b = 15.56(4) Å, c = 3.466(10) Å
α = 91.92°, β = 95.82°, γ = 108.67°
Ratio:a:b:c = 0.645 : 1 : 0.223
Unit Cell Volume:V 509.08 ų (Calculated from Unit Cell)
Morphology:Acicular to bladed crystals to 5cm, fibrous, aggregates.

Optical Data of Wegscheiderite

Type:Biaxial (-)
RI values: nα = 1.433 nβ = 1.519 nγ = 1.528
2V:Measured: 32° , Calculated: 34°
Maximum Birefringence:δ = 0.095

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

Chemical Properties of Wegscheiderite

Formula:
Na
 
5
H
 
3
(CO
 
3
)
 
4
Simplified for copy/paste:Na5H3(CO3)4
Essential elements:C, H, Na, O
All elements listed in formula:C, H, Na, O

Relationship of Wegscheiderite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
5.AA.05Zabuyelite
Li
 
2
CO
 
3
5.AA.10Natrite
Na
 
2
CO
 
3
5.AA.10Gregoryite
(Na
 
2
,K
 
2
,Ca)CO
 
3
5.AA.15Nahcolite
NaHCO
 
3
5.AA.20Kalicinite
KHCO
 
3
5.AA.25Teschemacherite
(NH
 
4
)HCO
 
3
Related Minerals - Hey's Index Grouping:

- +
11.1.1Zabuyelite
Li
 
2
CO
 
3
11.1.2Natrite
Na
 
2
CO
 
3
11.1.3Nahcolite
NaHCO
 
3
11.1.5Thermonatrite
Na
 
2
CO
 
3
· H
 
2
O
11.1.6Trona
Na
 
3
H(CO
 
3
)
 
2
· 2H
 
2
O
11.1.7Natron
Na
 
2
CO
 
3
· 10H
 
2
O
11.1.8Kalicinite
KHCO
 
3
11.1.9Shortite
Na
 
2
Ca
 
2
(CO
 
3
)
 
3
11.1.10Nyerereite
Na
 
2
Ca(CO
 
3
)
 
2
11.1.11Natrofairchildite
11.1.12Zemkorite
Na
 
2
Ca(CO
 
3
)
 
2
11.1.13Pirssonite
Na
 
2
Ca(CO
 
3
)
 
2
· 2H
 
2
O
11.1.14Gaylussite
Na
 
2
Ca(CO
 
3
)
 
2
· 5H
 
2
O
11.1.15Baylissite
K
 
2
Mg(CO
 
3
)
 
2
· 4H
 
2
O
11.1.16Fairchildite
K
 
2
Ca(CO
 
3
)
 
2
11.1.17Bütschliite
K
 
2
Ca(CO
 
3
)
 
2
11.1.18Teschemacherite
(NH
 
4
)HCO
 
3

Other Names for Wegscheiderite

Other Languages:
German:Wegscheiderit
Russian:Вегшайдерит
Simplified Chinese:碳氢钠石
Spanish:Wegscheiderita

Other Information

Other Information:Soluble in water.
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 Wegscheiderite

Reference List:

- +
American Mineralogist (1963): 48: 400-403.

Acta Crystallographica: B46: 466-474.

Internet Links for Wegscheiderite

Search Engines:
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  • Look for Wegscheiderite on Athena Mineralogy
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Wegscheiderite details from Handbook of Mineralogy (PDF)
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  • Localities for Wegscheiderite

    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.
    China
     
    • Henan Province
      • Nanyang Prefecture
        • Tongbai Co.
          • Biyang basin
    Jiping Wang, Youxun Zhang, Qingtang Yang, Jianmin Zhou, and Xiulian Ma (1991): Geological Review 56(1), 42-50
    Russia
     
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
    www.koeln.netsurf.de/~w.steffens/lovo.htm
    USA
     
    • Colorado
      • Rio Blanco Co.
        • Piceance Basin
          • Green River Formation
    Minerals of Colorado (1997) E.B. Eckels
    • Utah
      • Duchesne Co.
    http://gsa.confex.com/gsa/2002AM/finalprogram/abstract_45510.htm.
    U.S. GEOLOGICAL SURVEY Open-File Report 96-0729
    • Wyoming
      • Sweetwater Co.
        • Green River Formation
    Am Min 48:400-403; Am Min 48:400-403
    Amer.Min.(1963) 48, 400-403
    Am Min 48:400-403; Am Min 48:400-403
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    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. 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 thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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