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Vanthoffite

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Jacobus Henricus van 't Hoff
Formula:
Na6Mg(SO4)4
Colour:
Colourless, gray, pale yellow; colourless in transmitted light
Lustre:
Vitreous, Pearly
Hardness:
Specific Gravity:
2.694
Crystal System:
Monoclinic
Name:
Named after Jacobus Henricus van't Hoff (1852-1911), Professor of Chemistry, University of Amsterdam (1878-1896), University of Berlin (1896-1911), physical chemist and thermodynamicist, founder of stereochemistry, student of equilibria in salt solutions, nobelist (1901).
This page provides mineralogical data about Vanthoffite.


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Classification of VanthoffiteHide

Approved, 'Grandfathered' (first described prior to 1959)
7.AC.05

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
A : Sulfates (selenates, etc.) without additional anions, without H2O
C : With medium-sized and large cations
28.4.1.1

28 : ANHYDROUS ACID AND NORMAL SULFATES
4 : Miscellaneous
25.3.8

25 : Sulphates
3 : Sulphates of Mg

Physical Properties of VanthoffiteHide

Vitreous, Pearly
Transparency:
Transparent
Colour:
Colourless, gray, pale yellow; colourless in transmitted light
Streak:
Colourless
Hardness:
3½ on Mohs scale
Tenacity:
Fragile
Fracture:
Irregular/Uneven, Sub-Conchoidal
Density:
2.694 g/cm3 (Measured)    2.687 g/cm3 (Calculated)

Optical Data of VanthoffiteHide

Type:
Biaxial (-)
RI values:
nα = 1.486 nβ = 1.488 nγ = 1.489
2V:
Measured: 83° , Calculated: 70°
Max Birefringence:
δ = 0.003
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
weak r < v

Chemical Properties of VanthoffiteHide

Formula:
Na6Mg(SO4)4

Crystallography of VanthoffiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Cell Parameters:
a = 9.781(2) Å, b = 9.196(2) Å, c = 8.197(2) Å
β = 113.61(2)°
Ratio:
a:b:c = 1.064 : 1 : 0.891
Unit Cell V:
675.57 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Massive only; anhedral grains or bedded aggregates.

Type Occurrence of VanthoffiteHide

Other Language Names for VanthoffiteHide

German:Vanthoffit
Simplified Chinese:无水钠镁矾
Spanish:Vanthoffita

Related Minerals - Nickel-Strunz GroupingHide

7.AC.Acmonidesite(NH4,K,Pb)8NaFe2+4(SO4)5Cl8Orth. 2 2 2 : C2 2 21
7.AC.08Pyracmonite(NH4)3Fe(SO4)3Trig. 3m : R3c
7.AC.10Efremovite(NH4)2Mg2(SO4)3Iso.
7.AC.10LangbeiniteK2Mg2(SO4)3Iso. 2 3 : P21 3
7.AC.10ManganolangbeiniteK2Mn2(SO4)3Iso. 2 3 : P21 3
7.AC.15YavapaiiteKFe(SO4)2Mon. 2/m : B2/m
7.AC.15EldfelliteNaFe3+(SO4)2Mon. 2/m : B2/m
7.AC.20Godovikovite(NH4)Al(SO4)2Trig. 3 2 : P3 2 1
7.AC.20Sabieite(NH4)Fe3+(SO4)2Trig. 3 2 : P3 2 1
7.AC.25ThénarditeNa2SO4Orth. mmm (2/m 2/m 2/m) : Fddd
7.AC.30MetathénarditeNa2SO4Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
7.AC.35Aphthitalite(K,Na)3Na(SO4)2Trig.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

25.3.1KieseriteMgSO4 · H2OMon. 2/m
25.3.2SanderiteMgSO4 · 2H2OOrth. 2 2 2 : P21 21 21
25.3.3StarkeyiteMgSO4 · 4H2OMon. 2/m : P21/b
25.3.4PentahydriteMgSO4 · 5H2OTric.
25.3.5HexahydriteMgSO4 · 6H2OMon. 2/m : P2/m
25.3.6EpsomiteMgSO4 · 7H2OOrth. 2 2 2 : P21 21 21
25.3.7CaminiteMg7(SO4)5(OH)4 · H2OTet.
25.3.9BlöditeNa2Mg(SO4)2 · 4H2OMon. 2/m
25.3.10KonyaiteNa2Mg(SO4)2 · 5H2OMon. 2/m : P21/b
25.3.11LöweiteNa12Mg7(SO4)13 · 15H2OTrig.
25.3.12UklonskoviteNaMg(SO4)F · 2H2OMon.
25.3.13LangbeiniteK2Mg2(SO4)3Iso. 2 3 : P21 3
25.3.14LeoniteK2Mg(SO4)2 · 4H2OMon. 2/m
25.3.15PicromeriteK2Mg(SO4)2 · 6H2OMon. 2/m
25.3.16Efremovite(NH4)2Mg2(SO4)3Iso.
25.3.17Boussingaultite(NH4)2Mg(SO4)2 · 6H2OMon. 2/m : P21/b
25.3.18PickeringiteMgAl2(SO4)4 · 22H2OMon. 2/m : P21/b

Other InformationHide

Notes:
Soluble in water, slightly bitter taste.
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 VanthoffiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Kubierschky (1902) Akademie der Wissenschaften, Berlin, Ber.: 21: 404.
Görgey (1909) Mineralogische und petrographische Mitteilungen, Vienna: 28: 334.
Doelter, C. (1926) Handbuch der Mineral-chemie: 4(2): 93.
Ide (1935) Kali: 29: 83;...Min. Abs. (1936): 6: 351.
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 430.
Acta Crystallographica (1964): 17: 1613.
Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva (1973): 102: 192-193.
Zeitschrift für Kristallographie (1986): 174: 5.

Internet Links for VanthoffiteHide

Localities for VanthoffiteHide

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.
Austria
 
  • Salzburg
    • Hallein
      • Dürrnberg
R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
  • Tyrol
    • North Tyrol
      • Inn valley
        • Innsbruck
          • Hall
            • Hall valley
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 430, 447; R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
  • Upper Austria
    • Gmunden
      • Bad Ischl
        • Perneck
R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
China
 
  • Shandong Province
    • Tai'an Prefecture
      • Daiyue District
        • Dawenkou depression
Zhongde Zhu (1988): Mineral Deposits 7(1), 87-96
  • Xinjiang Autonomous Region
    • Bayin'gholin Autonomous Prefecture (Bayingolin Autonomous Prefecture; Bayinguoleng Autonomous Prefecture)
      • Ruoqiang Co. (Qakilik Co.; Chaqiliq Co.)
Yanling Tang (2005): Non-metallic deposits of Xinjiang, China [Zhongguo Xinjiang Fei Jinshu Kuangchuang]. Geological Publishing House (Beijing), 289 pp.
Germany
 
  • Hesse
    • Werra valley
      • Heringen
Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
      • Phillippsthal
Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
  • Saxony-Anhalt
    • Halberstadt
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 430.
    • Stassfurt Potash deposit
      • Stassfurt
Dana 6:A3:14,43,46; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 430; Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig (1911): 50: 139.
Iceland
 
  • Southern Region
    • Vestmannaeyjar archipelago (Westman islands)
      • Heimaey island
        • Heimaey
Mitolo, D., Garavelli, A., Pedersen, L., Balić-Žunić, T., Jakobsson, S.P., Vurro, F. (2008): Mineralogy of actually forming sublimates at Eldfell Volcano, Heimaey (Vestmannaeyjar archipelago), Iceland. Plinius, 34, 322.
Kazakhstan
 
  • Atyrau Province (Atyrau Oblysy; Atyrau Oblast')
    • Atyrau (Gur'yev)
Pekov, I. V. & Abramov, D. V. (1993): Boron deposit of the Inder and its minerals. World of Stones, 1, 23-30.
Russia
 
  • Far-Eastern Region
    • Kamchatka Oblast'
      • Tolbachik volcano
        • Great Fissure eruption (Main Fracture)
          • Northern Breakthrough (North Breach)
            • Second scoria cone
Pekov, I.V., Zubkova, N.V., Yapaskurt, V.O., Britvin, S.N., Vigasina, M.F., Sidorov, E.G., Pushcharovsky, D.Y. (2015): New zinc and potassium chlorides from fumaroles of the Tolbachik volcano, Kamchatka, Russia: mineral data and crystal chemistry. II. Flinteite, K2ZnCl4. European Journal of Mineralogy, 27, 581-588
USA
 
  • California
    • Imperial Co.
      • Bertram
        • Bertram siding
Murowchick, B.L. and Gricius, A. (1965) Vanthoffite in California. Gems and Minerals: 333: 45; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 380; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 267.
  • New Mexico
    • Eddy and Lea Counties
Northrop, Minerals of New Mexico, 3rd. rev. ed. (1996)
Mineral and/or Locality  
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