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Wegscheiderite

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About WegscheideriteHide

Rudolph Wegscheider
Formula:
Na5H3(CO3)4
Colour:
Colourless
Lustre:
Vitreous
Hardness:
2½ - 3
Specific Gravity:
2.341
Crystal System:
Triclinic
Name:
Named by Joseph J. Fahey, K.P Yorks, and Daniel E. Appleman in 1961 in honor of Rudolf Wegscheider (8 October 1859, Großbetschkerek, Austrian Empire - 8 January 1935, Vienna, Austria), chemist. In 1913, he first produced the synthetic compound.

Chemically related to nahcolite; also similar to trona, 'UM1974-04-CO:HNa'.


Classification of WegscheideriteHide

Approved
Approval Year:
1967
First Published:
1961
5.AA.30

5 : CARBONATES (NITRATES)
A : Carbonates without additional anions, without H2O
A : Alkali carbonates
13.1.6.1

13 : ACID CARBONATES
1 : Miscellaneous
11.1.4

11 : Carbonates
1 : Carbonates of the alkali metals and ammonium

Physical Properties of WegscheideriteHide

Vitreous
Transparency:
Translucent
Colour:
Colourless
Hardness:
2½ - 3 on Mohs scale
Cleavage:
Distinct/Good
Distinct prismatic cleavage
Fracture:
Irregular/Uneven, Sub-Conchoidal
Density:
2.341 g/cm3 (Measured)    2.334 g/cm3 (Calculated)

Optical Data of WegscheideriteHide

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

Formula:
Na5H3(CO3)4

Crystallography of WegscheideriteHide

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 V:
509.08 ų (Calculated from Unit Cell)
Morphology:
Acicular to bladed crystals to 5cm, fibrous, aggregates.

Type Occurrence of WegscheideriteHide

General Appearance of Type Material:
Randomly oriented bladed crystals
Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA, 117710.
Geological Setting of Type Material:
Lacustrine deposits
Associated Minerals at Type Locality:

Other Language Names for WegscheideriteHide

Simplified Chinese:碳氢钠石

Related Minerals - Nickel-Strunz GroupingHide

5.AA.05ZabuyeliteLi2CO3Mon. 2/m : B2/b
5.AA.10NatriteNa2CO3Mon.
5.AA.10Gregoryite(Na2,K2,Ca)CO3Hex.
5.AA.15NahcoliteNaHCO3Mon. 2/m
5.AA.20KaliciniteKHCO3Mon. 2/m
5.AA.25Teschemacherite(NH4)HCO3Orth. mmm (2/m 2/m 2/m) : Pccn

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

11.1.1ZabuyeliteLi2CO3Mon. 2/m : B2/b
11.1.2NatriteNa2CO3Mon.
11.1.3NahcoliteNaHCO3Mon. 2/m
11.1.5ThermonatriteNa2CO3 · H2OOrth. mmm (2/m 2/m 2/m) : Pmmm
11.1.6TronaNa3H(CO3)2 · 2H2OMon. 2/m
11.1.7NatronNa2CO3 · 10H2OMon. 2/m : P2/m
11.1.8KaliciniteKHCO3Mon. 2/m
11.1.9ShortiteNa2Ca2(CO3)3Orth. mm2 : Amm2
11.1.10NyerereiteNa2Ca(CO3)2Orth. mmm (2/m 2/m 2/m) : Cmcm
11.1.11NatrofairchilditeNa2Ca(CO3)2Orth.
11.1.12ZemkoriteNa2Ca(CO3)2Hex.
11.1.13PirssoniteNa2Ca(CO3)2 · 2H2OOrth. mm2 : Fdd2
11.1.14GaylussiteNa2Ca(CO3)2 · 5H2OMon. 2/m : B2/b
11.1.15BaylissiteK2Mg(CO3)2 · 4H2OMon.
11.1.16FairchilditeK2Ca(CO3)2Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
11.1.17BütschliiteK2Ca(CO3)2Trig. 3m (3 2/m) : R3m
11.1.18Teschemacherite(NH4)HCO3Orth. mmm (2/m 2/m 2/m) : Pccn

Other InformationHide

Notes:
Soluble in water.
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 WegscheideriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Wegscheider, R. (1913) Über Trona. Verhandlungen der Gesellschaft deutscher Naturforscher und Ärzte, 85 Versammlung Wien, Teil 2, Hälfte 1: 366.
Wegscheider, R., Mehl, J. (1928) Über system Na2CO3-NaHCO3·H2O und das Existenzgebiet der Trona, Monatshefte für Chemie: 283-315.
Milton, C., Fahey, J.J. (1960) Green River mineralogy--a historical account. Wyoming Geological Association Guidebook 15th Annual Field Conference: 159-162. (unnamed)
Fahey, J.J., Yorks, K.P., Appleman, D.E. (1961) Wegscheiderite, a new saline mineral from the Green River Formation, Wyoming. Geological Society of America, Abstracts Annual Meetings 1961: 48A-49A.
Fleischer, M. (1962) New mineral names. American Mineralogist: 47: 414-420.
Fahey, J.J., Yorks, K.P. (1963) Wegscheiderite (Na2CO3·3NaHCO3), a new saline mineral from the Green River formation, Wyoming. American Mineralogist: 48: 400-403.
Fleischer, M. (1964) New mineral names. American Mineralogist: 49: 439-448.
International Mineralogical Association (1967) Commission on new minerals and mineral names. Mineralogical Magazine: 36: 131-136.
Fernandes, N.G., Tellgren, R., Olovsson, I. (1990) Structure and electron density of pentasodium trihydrogentetracarbonate. Acta Crystallographica: B46: 466-474.

Internet Links for WegscheideriteHide

Localities for WegscheideriteHide

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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
China
 
  • Henan Province
    • Nanyang Prefecture
      • Tongbai Co.
        • Biyang basin
Qingtang Yang (1987): Acta Petrologica et Mineralogica 6(1), 87-92; Jiping Wang, Youxun Zhang, Qingtang Yang, Jianmin Zhou, and Xiulian Ma (1991): Geological Review 56(1), 42-50
Russia
 
  • Northern Region
    • Murmanskaya Oblast'
www.koeln.netsurf.de/~w.steffens/lovo.htm
USA
 
  • Colorado
    • Rio Blanco Co.
      • Piceance Basin
        • Green River Formation
Minerals of Colorado (1997) E.B. Eckel
  • 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
Mineral and/or Locality  
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