Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (2 online) Mindat Auctions

Darapskite

Big Photo

Iquique, Iquique Province, Tarapacá Region, Chile
© 2007, JGW

Formula:
Na
 
3
NO
 
3
SO
 
4
·H
 
2
O
System:MonoclinicColour:Colourless
Lustre:VitreousHardness:2½
Name:After L. Darapsky of Santiago, Chile.


Often occurs in cavities or crevices in massive nitrate rock or as a surficial concentration (Chile).

Classification of Darapskite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:6/D.16-10
Nickel-Strunz 10th (pending) edition ID: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 edition ID:20.1.1.1
Dana 8th edition ID:20.1.1.1

20 : COMPOUND NITRATES
1 : Miscellaneous
Hey's CIM Ref.:13.9

13 : Nitrates
mindat.org URL:http://www.mindat.org/min-1226.html
Please feel free to link to this page.

Type Occurrence of Darapskite

Type Locality:Pampa del Toro, Oficina Lautaro, Antofagasta Region, Chile
Year of Discovery:1891

Occurrences of Darapskite

Geological Setting:Nitrate deposits rich in sulfates.

Physical Properties of Darapskite

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

Crystallography of Darapskite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Cell Parameters:a = 10.57Å, b = 6.91Å, c = 5.18Å
β = 102.77°
Ratio:a:b:c = 1.53 : 1 : 0.75
Unit Cell Volume: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.

Optical Data of Darapskite

Type:Biaxial (-)
RI values: nα = 1.388 nβ = 1.479 nγ = 1.486
2V:Measured: 26° to 28°, Calculated: 28°
Maximum Birefringence:δ = 0.098

Chart 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 Darapskite

Formula:
Na
 
3
NO
 
3
SO
 
4
·H
 
2
O
Essential elements:H, N, Na, O, S
All elements listed in formula:H, N, Na, O, S

Relationship of Darapskite to other Species

Common Associates:
NitratineHaliteBlöditeAnhydrite
Related Minerals - Nickel-Strunz Grouping):

- +
7.DG.10Clinoungemachite
(Na, K, Fe, SO
 
4
)
7.DG.10Humberstonite
Na
 
7
K
 
3
Mg
 
2
(SO
 
4
)
 
6
(NO
 
3
)
 
2
·6H
 
2
O
7.DG.10Ungemachite
K
 
3
Na
 
8
Fe(SO
 
4
)
 
6
(NO
 
3
)
 
2
·6H
 
2
O
7.DG.15Bentorite
Ca
 
6
(Cr
3+
 
,Al)
 
2
[(OH)
 
4
|SO
 
4
]
 
3
 · 26H
 
2
O
7.DG.15Charlesite
Ca
 
6
(Al,Si)
 
2
[(OH,O)
 
12
|B(OH)
 
4
|(SO
 
4
)
 
2
] · 26H
 
2
O
7.DG.15Ettringite
Ca
 
6
Al
 
2
[(OH)
 
4
|SO
 
4
]
 
3
 · 26H
 
2
O
7.DG.15Jouravskite
Ca
 
6
Mn
3+
2
[(OH)
 
4
|(SO
 
4
,CO
 
3
)]
 
3
 · 26H
 
2
O
7.DG.15Sturmanite
Ca
 
6
(Fe
3+
 
,Al,Mn
3+
 
)
 
2
[(OH)
 
12
|B(OH)
 
4
|(SO
 
4
)
 
2
] · 25H
 
2
O
7.DG.15Thaumasite
Ca
 
3
[CO
 
3
|SO
 
4
|Si(OH)
 
6
] · 12H
 
2
O
7.DG.15Carraraite
Ca
 
3
Ge(OH)
 
6
(SO
 
4
)(CO
 
3
)·12H
 
2
O
7.DG.15Buryatite
Ca
 
3
(Si,Fe,Al)[SO
 
4
][B(OH)
 
4
](OH)
 
5
O•
 
12
H
 
2
O
7.DG.20Rapidcreekite
Ca
 
2
[CO
 
3
|SO
 
4
] · 4H
 
2
O
7.DG.20Korkinoite
Ca, SO
 
4
, H
 
2
O reported
7.DG.25Tatarskite
Ca
 
6
Mg
 
2
(SO
 
4
)
 
2
(CO
 
3
)
 
2
Cl
 
4
(OH)
 
4
·7H
 
2
O
7.DG.30Nakauriite
Cu
 
8
[(OH)
 
6
|CO
 
3
|(SO
 
4
)
 
4
] · 48H
 
2
O
7.DG.35Chessexite
(Na,K)
 
4
Ca
 
2
(Mg,Zn)
 
3
Al
 
8
[(SO
 
4
)
 
10
|(SiO
 
4
)
 
2
] · 40H
 
2
O
7.DG.40Carlosruizite
K
 
6
(Na,K)
 
4
Na
 
6
Mg
 
10
(SeO
 
4
)
 
12
(IO
 
3
)
 
12
·12H
 
2
O
7.DG.40Fuenzalidaite
K
 
6
(Na,K)
 
4
Na
 
6
Mg
 
10
(SO
 
4
)
 
12
(IO
 
3
)
 
12
·12H
 
2
O
7.DG.45Chelyabinskite
(Ca,Mg)
 
3
[(SO
 
4
,CO
 
3
)
 
2
|Si(OH)
 
6
] · 9H
 
2
O (?)
Related Minerals - Hey's Index Grouping:

- +
13.1Nitratine
NaNO
 
3
13.2Niter
KNO
 
3
13.3Gerhardtite
Cu
 
2
[(OH)
 
3
|NO
 
3
]
13.4Nitromagnesite
Mg(NO
 
3
)
 
2
·6H
 
2
O
13.5Nitrocalcite
Ca(NO
 
3
)
 
2
·4H
 
2
O
13.6Nitrobarite
Ba(NO
 
3
)
 
2
13.7Buttgenbachite
Cu
 
19
[(OH)
 
32
|(NO
 
3
)
 
2
|Cl
 
4
] · 2H
 
2
O
13.8Sveite
KAl
 
7
[Cl|(OH)
 
8
|(NO
 
3
)
 
2
]
 
2
 · 8H
 
2
O
13.10Humberstonite
Na
 
7
K
 
3
Mg
 
2
(SO
 
4
)
 
6
(NO
 
3
)
 
2
·6H
 
2
O
13.11Mbobomkulite
(Ni,Cu)Al
 
4
[(OH)
 
12
|{(NO
 
3
)
 
2
,SO
 
4
}] · 3H
 
2
O
13.12Hydrombobomkulite
(Ni,Cu)Al
 
4
[(OH)
 
12
|{(NO
 
3
)
 
2
,SO
 
4
}] · 13-14H
 
2
O
13.13Nickelalumite
(Ni,Cu)Al
 
4
[(OH)
 
12
|{SO
 
4
,(NO
 
3
)
 
2
}] · 3H
 
2
O

Other Names for Darapskite

Other Languages:
German:Darapskit
Russian:Дарапскит
Spanish:Darapskita

Other Information

Other Information:Readily 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 Darapskite

Reference List: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 Darapskite

Search Engines:
  • Look for Darapskite on Google
  • Look for Darapskite images on Google
    • External Links:
  • Look for Darapskite on Webmineral
  • Look for Darapskite on Athena Mineralogy
  • Look for Darapskite on Wikipedia
  • Look for Darapskite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Darapskite in the Natural History Museum (London) online catalogue
  • Darapskite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • Fine Minerals from Dan Weinrich Minerals
  • Wilensky Fine Minerals
  • Buy from David K Joyce minerals
  • Wendel Minerals - Auktion & Shop
  • Wright's Rock Shop - excellent mineral specimens since 1970
  • rare and unusual minerals mainly crystallized
  • Search for - Darapskite - on e-Rocks Mineral Sales & Auctions
  • Top quality minerals from Kristalle of California
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • Fabre Minerals - search for Darapskite specimens
  • Buy minerals from Mineralium.com
  • Find Darapskite on www.crystalclassics.co.uk
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

    Sponsorship:This page is currently not sponsored. Click here to sponsor this page.

    Localities for Darapskite

    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.
    Chile
     
    • Antofagasta Region
      • Antofagasta Province
        • Canchas
    		American Mineralogist: 79: 1003-1008.
      • 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.
      • 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.
      • 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)
    • Tarapacá Region
      • Iquique 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.
    American Mineralogist: 79: 1003-1008.
    USA
     
    • Arizona
      • Greenlee Co.
        • Peloncillo Mts
    		Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 199.
    • California
      • 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.
    • 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.
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    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: 29th Oct 2009 08:44:25