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Darapskite

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Formula:
Na3(SO4)(NO3) · H2O
Colour:
Colourless
Lustre:
Vitreous
Hardness:
Crystal System:
Monoclinic
Name:
After L. Darapsky of Santiago, Chile.
Often occurs in cavities or crevices in massive nitrate rock or as a surficial concentration (Chile).


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Classification of DarapskiteHide

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

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
G : With large and medium-sized cations; with NO3, CO3, B(OH)4, SiO4 or IO3
Dana 7th ed.:
20.1.1.1
20.1.1.1

20 : COMPOUND NITRATES
1 : Miscellaneous
13.9

13 : Nitrates

Physical Properties of DarapskiteHide

Vitreous
Transparency:
Transparent
Colour:
Colourless
Streak:
White
Hardness:
2½ on Mohs scale
Cleavage:
Perfect
On {010}. Also perfect cleavage on {100} (may be a parting).

Optical Data of DarapskiteHide

Type:
Biaxial (-)
RI values:
nα = 1.388 nβ = 1.479 nγ = 1.486
2V:
Measured: 26° to 28°, Calculated: 28°
Max Birefringence:
δ = 0.098
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r > v rather strong

Chemical Properties of DarapskiteHide

Formula:
Na3(SO4)(NO3) · H2O

Crystallography of DarapskiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 10.57 Å, b = 6.91 Å, c = 5.18 Å
β = 102.77°
Ratio:
a:b:c = 1.53 : 1 : 0.75
Unit Cell V:
368.98 ų (Calculated from Unit Cell)
Morphology:
Crystals tabular {100}, and pseudo-tetragonal [100].
Twinning:
Common on {100}. Re-entrant angles on the edges and composition face {100}. Polysynthetic at times.

Type Occurrence of DarapskiteHide

Other Language Names for DarapskiteHide

German:Darapskit
Simplified Chinese:钠硝矾
Spanish:Darapskita

Common AssociatesHide

AnhydriteCaSO4
BlöditeNa2Mg(SO4)2 · 4H2O
HaliteNaCl
NitratineNaNO3

Related Minerals - Nickel-Strunz GroupingHide

7.DG.10Clinoungemachite(Na, K, Fe, SO4)Mon. 2/m
7.DG.10HumberstoniteNa7K3Mg2(SO4)6(NO3)2 · 6H2OTrig. 3 : R3
7.DG.10UngemachiteK3Na8Fe(SO4)6(NO3)2 · 6H2OTrig. 3 : R3
7.DG.15BentoriteCa6(Cr3+,Al)2(SO4)3(OH)12 · 26H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
7.DG.15CharlesiteCa6(Al,Si)2(SO4)2[B(OH)4](OH,O)12 · 26H2OTrig. 3m : P3 1c
7.DG.15EttringiteCa6Al2(SO4)3(OH)12 · 26H2OTrig. 3m : P3 1c
7.DG.15JouravskiteCa3Mn4+(SO4)(CO3)(OH)6 · 12H2OHex.
7.DG.15SturmaniteCa6(Fe3+,Al,Mn3+)2(SO4)2[B(OH)4](OH)12 · 25H2OTrig. 3m : P3 1c
7.DG.15ThaumasiteCa3(SO4)[Si(OH)6](CO3) · 12H2OHex. 6 : P63
7.DG.15CarraraiteCa3(SO4)[Ge(OH)6](CO3) · 12H2OHex.
7.DG.15BuryatiteCa3(Si,Fe,Al)(SO4)[B(OH)4]O(OH)5 · 12H2O
7.DG.20RapidcreekiteCa2(SO4)(CO3) · 4H2OOrth.
7.DG.20KorkinoiteCa4(SO4)2(CO3)2 · 9(H2O)Orth. mmm (2/m 2/m 2/m) : Pmmm
7.DG.25TatarskiteCa6Mg2(SO4)2(CO3)2(OH)4Cl4 · 7H2OOrth.
7.DG.30NakauriiteCu8(SO4)4(CO3)(OH)6 · 48H2OOrth.
7.DG.35Chessexite(Na,K)4Ca2(Mg,Zn)3Al8(SO4)10(SiO4)2 · 40H2OOrth.
7.DG.40CarlosruiziteK6(Na,K)4Na6Mg10(SeO4)12(IO3)12 · 12H2OTrig. 3m (3 2/m) : P3c1
7.DG.40FuenzalidaiteK6(Na,K)4Na6Mg10(SO4)12(IO3)12 · 12H2OTrig. 3m (3 2/m) : P3c1
7.DG.45Chelyabinskite(Ca,Mg)3(SO4,CO3)2[Si(OH)6] · 9H2O (?)Orth.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

13.1NitratineNaNO3Trig. 3m (3 2/m) : R3c
13.2NiterKNO3Orth. mmm (2/m 2/m 2/m) : Pmma
13.3GerhardtiteCu2(NO3)(OH)3Orth. 2 2 2 : P21 21 21
13.4NitromagnesiteMg(NO3)2 · 6H2OMon. 2/m
13.5NitrocalciteCa(NO3)2 · 4H2OMon. 2/m
13.6NitrobariteBa(NO3)2Iso. m3 (2/m 3) : Pa3
13.7ButtgenbachiteCu19(NO3)2(OH)32Cl4 · 2H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
13.8SveiteKAl7(NO3)4(OH)16Cl2 · 8H2OMon.
13.10HumberstoniteNa7K3Mg2(SO4)6(NO3)2 · 6H2OTrig. 3 : R3
13.11Mbobomkulite(Ni,Cu)Al4((NO3)2,SO4)(OH)12 · 3H2OMon.
13.12Hydrombobomkulite(Ni,Cu)Al4((NO3)2,SO4)(OH)12 · 13-14H2OMon.
13.13Nickelalumite(Ni,Cu)Al4(SO4,(NO3)2)(OH)12 · 3H2OMon.

Other InformationHide

Notes:
Readily 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 DarapskiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Dietze (1891) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 19: 445.
Osann (1894) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 23: 584.
Schulten (1896) Bulletin de la Société française de Minéralogie: 19: 161.
Semper and Michels (1904) Zs. Berg.-Hütt.-und Salinenwesen: 52: 359.
Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679: 66.
Foote (1925) American Journal of Science: 9: 441 (artif. compound).
Wetzel (1928) Chemie der Erde, Jena: 3: 385, 411.
Hintze, Carl (1930) Handbuch der Mineralogie. Berlin and Leipzig. 6 volumes: 1 [3B]: 4553.
Palache, Charles, Harry Berman & Clifford Frondel (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Seventh edition, Volume II: 309-311.
American Mineralogist (1970): 55: 1500-1517.

Internet Links for DarapskiteHide

Localities for DarapskiteHide

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

(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
Antarctica
 
  • Eastern Antarctica
    • Queen Maud Land (Dronning Maud Land)
Ericksen & Mrose (1970) American Mineralogist 55:1500-1517
    • Victoria Land
      • McMurdo Dry Valleys
        • Taylor Valley
Hodenberg, R.V., Miotke, F.-D. (1983): Some special salt crystal formations in South-Victoria-Land, Antarctica, and first results of the investigation of a new mineral, a Na-Ca double sulfate. Kali u. Steinsalz, Bd. 8: 11: 374-383 (in German); in: Dunn, P.J., Gobel, V., Grice, J.D., Puziewicz, J., Shigley, J.E., Vanko, D.A., Zilczer, J. (1985): New mineral names. American Mineralogist: 70: 439
      • Olympus Range
Hodenberg, R.V., Miotke, F.-D. (1983): Some special salt crystal formations in South-Victoria-Land, Antarctica, and first results of the investigation of a new mineral, a Na-Ca double sulfate. Kali u. Steinsalz, Bd. 8: 11: 374-383 (in German); in: Dunn, P.J., Gobel, V., Grice, J.D., Puziewicz, J., Shigley, J.E., Vanko, D.A., Zilczer, J. (1985): New mineral names. American Mineralogist: 70: 439
Bahamas
 
  • San Salvador District
    • San Salvador Island
Onac B.P., Sumrall J., Mylroie J.E., Kearns J. (2009): Cave minerals of San Salvador Island, Bahamas. The University of South Florida karst studies series, 1, 70 pp.
Chile
 
  • Antofagasta Region
    • Antofagasta Province
      • Canchas
American Mineralogist: 79: 1003-1008.; Ericksen & Mrose (1970) American Mineralogist 55:1500-1517
      • Santa Catalina
Ericksen & Mrose (1970) American Mineralogist 55:1500-1517
      • Taltal
Natural History Museum Vienna collection
        • Oficina Lautaro
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: 310; American Mineralogist (1970): 55: 1500.
    • El Loa Province
      • Calama
        • Chuquicamata District
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: 310.; Ericksen & Mrose (1970) American Mineralogist 55:1500-1517
    • Tocopilla Province
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: 310.
      • Pedro de Valdivia
Pueyo, J. J., Chong, G. & Vega, M. (1998): Mineralogy and parental brine evolution in the Pedro de Valdivia nitrate deposit, Antofagasta, Chile. Revista Geologica de Chile 25, 3-15. (in Spanish)
      • Tocopilla District
samples analysed by Gerhard Mohn and Joy Desor
  • Tarapacá Region
    • El Tamarugal Province
      • Huara
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: 310.
      • Oficina Victoria
Am. Min.1989, V74, 1207-1214.
American Mineralogist: 79: 1003-1008.
    • Iquique Province
      • Chanabaya
Gunnar Farber specimens
China
 
  • 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.
Bingxiao Li (1992): Journal of Lake Sciences 4(1), 48-55; Keqin Cai, Jianhua Gao, Dejun Zhao, and Youku Yu (1992): Acta Mineralogica Sinica 12(2), 143-151
    • Tulufan Prefecture (Turfan Prefecture; Turpan Prefecture)
      • Shanshan Co. (Piqan Co.; Pichan Co.)
        • Kumtag basin
Wensheng Ge (2008): Presented at the 33rd International Geological Congress, Oslo (Norway), August 6-14, 2008.; Yuezhen Gao (1993): Geology of Chemical Minerals 15(1)
      • Tulufan Co. (Turfan Co.; Turpan Co.)
        • Turfan basin (Turpan basin)
Bingxiao Li (1992): Journal of Lake Sciences 4(1), 48-55
Yanling Tang (2005): Non-metallic deposits of Xinjiang, China [Zhongguo Xinjiang Fei Jinshu Kuangchuang]. Geological Publishing House (Beijing), 289 pp.
Romania
 
  • Hunedoara Co.
    • Cerna valley
Onac, B. P. (2009): ACTA CARSOLOGICA 38/1, 27-39
USA
 
  • Arizona
    • Cochise Co.
      • Bowie area
http://www.excaliburmineral.com/mind-j.htm
    • Greenlee Co.
      • Peloncillo Mts
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 199.
  • California
    • Inyo Co.
      • Amargosa Range
Ericksen & Mrose (1970) American Mineralogist 55:1500-1517
Ericksen, G. E., Hosterman, J. W., & Amand, P. S. (1988). Chemistry, mineralogy and origin of the clay-hill nitrate deposits, Amargosa River valley, Death Valley region, California, USA. Chemical geology, 67(1-2), 85-102.
Bailey, Gilbert E. (1902), The saline deposits of California: California Mining Bureau Bulletin 24: 170; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 166; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 342.
    • San Bernardino Co.
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: 310.; Ericksen & Mrose (1970) American Mineralogist 55:1500-1517
  • New Mexico
NSS Bulletin 43:127-132
  • Texas
    • Brewster Co.
      • Big Bend National Park
Rocks & Minerals: 66(3): 196-224.; Mineralogical Magazine 1977 41 : 548-550.
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