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Glauberite

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Consuelo Mine, Chinchon, Madrid, Spain
© E-Minerales

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Formula:
Na
 
2
Ca(SO
 
4
)
 
2
System:MonoclinicColour:Grey, yellowish, ...
Lustre:Vitreous, Waxy, PearlyHardness:2½ - 3
Name:
Named in allusion to its content of the compound Na2SO4, formerly called Glauber's Salt, after the German alchemist Johann Rudolf Glauber (1604-1668).
This page provides mineralogical data about Glauberite.

Classification of Glauberite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:6/A.08-40
Nickel-Strunz 10th (pending) edition ID:7.AD.25

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
A : Sulfates (selenates, etc.) without additional anions, without H2O
D : With only large cations
Dana 8th edition ID:28.4.2.1

28 : ANHYDROUS ACID AND NORMAL SULFATES
4 : Miscellaneous
Hey's CIM Ref.:25.4.4

25 : Sulphates
4 : Sulphates of Ca, Sr and Ba
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Type Occurrence of Glauberite

Co-type Localities:El Castellar mine, Villarrubia de Santiago, Ocaña, Toledo, Castile-La Mancha, Spain
Los Castilletes mine, Villarrubia de Santiago, Ocaña, Toledo, Castile-La Mancha, Spain
Place of Conservation of Type Material:Natural history museum, Paris 23.400-223,402
Year of Discovery:1808
Geological Setting of type material:Salt deposit.
Associated Minerals at type locality:
Halite

Occurrences of Glauberite

Geological Setting:Lacustrine and oceanic salt deposits; at fumarole deposits; in nitrate deposits in arid regions.

Physical Properties of Glauberite

Lustre:Vitreous, Waxy, Pearly
Diaphaneity (Transparency):Transparent, Translucent
Comment:Pearly on cleavage {001}
Colour:Grey, yellowish, colourless; colourless in transmitted light
Streak:White
Hardness (Mohs):2½ - 3
Tenacity:Brittle
Cleavage:Perfect
On {001} perfect; on {110} indistinct.
Fracture:Conchoidal
Translation gliding:Exhibits translation gliding.
Density (measured):2.75 - 2.85 g/cm3
Density (calculated):2.78 g/cm3

Crystallography of Glauberite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:B2/b {B1 1 2/b} {C2/c} {C1 2/c 1}
Space Group Setting:C2/c
Cell Parameters:a = 10.129(2) Å, b = 8.306(2) Å, c = 8.533(2) Å
β = 112.19(1)°
Ratio:a:b:c = 1.219 : 1 : 1.027
Unit Cell Volume:V 664.72 ų (Calculated from Unit Cell)
Z:4
Morphology:Crystals tabular {001}, with {110} lacking at times; prismatic by extension of [101] with large {111}; dipyramidal through combinations of {111} and {110}; prismatic [001] with large {110}. {001} and {111} often striated parallel to their intersection, and {111} may be rounded or step-like near the termination.
Crystal Atlas:
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Glauberite no.12 - Goldschmidt (1913-1926)
Glauberite no.18 - Goldschmidt (1913-1926)

About Crystal Atlas

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X-Ray Powder Diffraction:
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Radiation - Copper Kα
Data Set:
Horizontal Axis: ° to ° Vertical Axis: % Source Data: Filtered Data: Peaks:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Glauberite

Type:Biaxial (-)
RI values: nα = 1.507 - 1.515 nβ = 1.527 - 1.535 nγ = 1.529 - 1.536
2V:Calculated: 24° to 34°
Maximum Birefringence:δ = 0.022

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

Chemical Properties of Glauberite

Formula:
Na
 
2
Ca(SO
 
4
)
 
2
Essential elements:Ca, Na, O, S
All elements listed in formula:Ca, Na, O, S

Relationship of Glauberite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
7.AD.05Arcanite
K
 
2
SO
 
4
7.AD.05Mascagnite
(NH
 
4
)
 
2
SO
 
4
7.AD.10Mercallite
KHSO
 
4
7.AD.15Misenite
K
 
8
H
 
6
(SO
 
4
)
 
7
7.AD.20Letovicite
(NH
 
4
)
 
3
H(SO
 
4
)
 
2
7.AD.30Anhydrite
CaSO
 
4
7.AD.35Anglesite
PbSO
 
4
7.AD.35Baryte
BaSO
 
4
7.AD.35Celestine
SrSO
 
4
7.AD.35Olsacherite
Pb
 
2
SO
 
4
SeO
 
4
7.AD.40Kalistrontite
K
 
2
Sr(SO
 
4
)
 
2
7.AD.40Palmierite
(K,Na)
 
2
Pb(SO
 
4
)
 
2
Related Minerals - Hey's Index Grouping:

- +
25.4.1Anhydrite
CaSO
 
4
25.4.2Bassanite
Ca[SO
 
4
] · 0.5H
 
2
O
25.4.3Gypsum
Ca[SO
 
4
] · 2H
 
2
O
25.4.5Cesanite
Na
 
3
Ca
 
2
[OH|(SO
 
4
)
 
3
]
25.4.6Eugsterite
Na
 
4
Ca(SO
 
4
)
 
3
·2H
 
2
O
25.4.7Hydroglauberite
Na
 
10
Ca
 
3
(SO
 
4
)
 
8
·6H
 
2
O
25.4.8Syngenite
K
 
2
Ca(SO
 
4
)
 
2
·H
 
2
O
25.4.9Görgeyite
K
 
2
Ca
 
5
(SO
 
4
)
 
6
·H
 
2
O
25.4.10Polyhalite
K
 
2
Ca
 
2
Mg(SO
 
4
)
 
4
·2H
 
2
O
25.4.11Koktaite
(NH
 
4
)
 
2
Ca(SO
 
4
)
 
2
·H
 
2
O
25.4.12Ye'elimite
Ca
 
4
Al
 
6
[O
 
12
|SO
 
4
]
25.4.13Ettringite
Ca
 
6
Al
 
2
[(OH)
 
4
|SO
 
4
]
 
3
 · 26H
 
2
O
25.4.14Bentorite
Ca
 
6
(Cr
3+
 
,Al)
 
2
[(OH)
 
4
|SO
 
4
]
 
3
 · 26H
 
2
O
25.4.15Celestine
SrSO
 
4
25.4.16Kalistrontite
K
 
2
Sr(SO
 
4
)
 
2
25.4.17Baryte
BaSO
 
4

Other Names for Glauberite

Other Languages:
German:Glauberit
Indonesian:Glauberit
Italian:Glauberite
Polish:Glauberyt
Russian:Глауберит
Spanish:Glauberita
Ukrainian:Глауберит

Other Information

Other Information:Powdery surface alteration in humid environments to gypsum with leaching of sodium sulfate.
Special Storage/
Display Requirements:		Powdery surface alteration in humid environments to gypsum with leaching of sodium sulfate
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 Glauberite

Reference List:Brongniart (1808) Journal des mines {superseded by Annales des mines}: 23: 5.

Leonhard (1825) Naturges. des Mineralreiches: 159.

Zepharovich (1874) Konigliche Akademie der Wissenschaften, Vienna, Ber.: 69: 16.

Laspeyres (1877) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 1: 529.

Kraus (1913) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 52: 321.

Kraus and Peck (1917) Michigan Academy of Science, Annual Report: 19: 95.

Goldschmidt, V. (1918) Atlas der Krystallformen. 9 volumes, atlas, and text, vol. 4: 46.

Wetzel (1924) Zeitschrift für praktische Geologie, Berlin, hale a.S.: 32: 119.

Hawkins (1928) American Journal of Science: (5): 16: 361.

Schaller (1932) USGS Bulletin 832: 55.

Schaller and Henderson (1932) USGS Bull. 833: 27.

Larsen, E.S. and Berman, H. (1934) The Microscopic Determination of the Nonopaque Minerals, Second edition, USGS Bulletin 848: 156.

Pardillo (1934) Ac. cienc. arts, Barcelona, Mem.: 25: 1.

Pardillo (1935) Neues Jahrbuch für Mineralogie, Geologie und Paleontologie, Heidelberg, Stuttgart: I: 344.

Hill and Wills (1938) American Chemical Society Journal: 60: 1647.

Godlevsky (1939) Mineralogicheskoe Obshchestvo, Leningrad, Zapiski: 68: 576.

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: 431-433.

Araki, T. & T. Zoltai (1967), Refinement of the crystal structure of a glauberite: American Mineralogist: 52: 1272-1275.

Zeitschrift für Kristallographie: 122: 175-184.

Internet Links for Glauberite

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    Localities for Glauberite

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