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Strontianite

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Formula:
SrCO
 
3
System:OrthorhombicColour:Colourless, white, gray, ...
Hardness:
Member of:Aragonite Group
Name:Named in 1791 by Friedrich Gabriel Sulzer after its discovery locality, Strontian, Scotland.


The Sr analogue of witherite.

Strontianite, strontium carbonate, is mainly found as a low-temperature mineral in limestone and also found as a gangue mineral in sulphide veins. It is almost always fluorescent.

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Classification of Strontianite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:5/B.04-20
Nickel-Strunz 10th (pending) edition ID:5.AB.15

5 : CARBONATES (NITRATES)
A : Carbonates without additional anions, without H2O
B : Alkali-earth (and other M2+) carbonates
Dana 8th edition ID:14.1.3.3

14 : ANHYDROUS NORMAL CARBONATES
1 : A(XO3)
Hey's CIM Ref.:11.5.1

11 : Carbonates
5 : Carbonates of Sr and Ba
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Type Occurrence of Strontianite

Type Locality:Strontian, North West Highlands (Argyllshire), Scotland, UK
Year of Discovery:1790
Geological Setting of type material:In veins in gneiss.

Occurrences of Strontianite

Geological Setting:Forms in low-temperature hydrothermal deposits in limestone and marl or as a gangue mineral in sulfide veins; as geodes or concretionary masses in limestone or clay.

Physical Properties of Strontianite

Lustre:Vitreous, Resinous
Diaphaneity (Transparency):Transparent, Translucent
Colour:Colourless, white, gray, light yellow, green, brown; colourless in transmitted light
Streak:White
Hardness (Mohs):
Tenacity:Brittle
Cleavage:Very Good
On {110} nearly perfect; on {021} poor; on {010} in traces.
Parting:None noted.
Fracture:Irregular/Uneven, Sub-Conchoidal
Density (measured):3.74 - 3.78 g/cm3
Density (calculated):3.722 g/cm3

Crystallography of Strontianite

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:a = 5.1059(7) Å, b = 8.4207(13) Å, c = 6.0319(11) Å
Ratio:a:b:c = 0.606 : 1 : 0.716
Unit Cell Volume:V 259.34 ų (Calculated from Unit Cell)
Z:4
Morphology:Crystals short to long prismatic [001], often acicular. Often pseudohexagonal in aspect due to equal development of {110} and {010} or of {hhl} and {0.2h.l}. {110} and {010} are striated horizontally, the steep {hhl} and {0kl} forms are rounded at times. Massive, columnar to fibrous; granular; rounded masses.
Twinning:Very common. Twin plane {110}, usually as contact twins, rarely as penetration twins; also repeated, as trillings, fourlings, or polysynthetic, yielding enclosed twin lamellae.
Comment:Non-standard space group setting (Pmcn).
Crystal Atlas:
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Strontianite no.7 - Goldschmidt (1913-1926)
Strontianite no.13 - Goldschmidt (1913-1926)

About Crystal Atlas

The mindat.org Crystal Atlas allows you to view a selection of crystal drawings of real and idealised crystal forms for this mineral and, in certain cases, 3d rotating crystal objects. The 3d models and HTML5 code are kindly provided by www.smorf.nl.

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Transparency
Opaque | Translucent | Transparent

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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:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Strontianite

Type:Biaxial (-)
RI values: nα = 1.516 - 1.520 nβ = 1.664 - 1.667 nγ = 1.666 - 1.668
2V:Measured: 7° , Calculated: 12° to 8°
Maximum Birefringence:δ = 0.150

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:weak

Chemical Properties of Strontianite

Formula:
SrCO
 
3
Simplified for copy/paste:SrCO3
Essential elements:C, O, Sr
All elements listed in formula:C, O, Sr
Common Impurities:Ca

Relationship of Strontianite to other Species

Series:Forms a series with Cerussite (see here)
Member of:Aragonite Group
Other Members of Group:

- +
Aragonite
CaCO
 
3
Cerussite
PbCO
 
3
Witherite
BaCO
 
3
Related Minerals - Nickel-Strunz Grouping):

- +
5.AB.05Calcite
CaCO
 
3
5.AB.05Gaspéite
(Ni,Mg,Fe)CO
 
3
5.AB.05Magnesite
MgCO
 
3
5.AB.05Otavite
CdCO
 
3
5.AB.05Rhodochrosite
MnCO
 
3
5.AB.05Siderite
FeCO
 
3
5.AB.05Smithsonite
ZnCO
 
3
5.AB.05Spherocobaltite
CoCO
 
3
5.AB.10Ankerite
Ca(Fe
2+
 
,Mg)(CO
 
3
)
 
2
5.AB.10Dolomite
CaMg(CO
 
3
)
 
2
5.AB.10Kutnohorite
Ca(Mn,Mg,Fe)(CO
 
3
)
 
2
5.AB.10Minrecordite
CaZn(CO
 
3
)
 
2
5.AB.15Aragonite
CaCO
 
3
5.AB.15Cerussite
PbCO
 
3
5.AB.15Witherite
BaCO
 
3
5.AB.20Vaterite
CaCO
 
3
5.AB.25Huntite
CaMg
 
3
(CO
 
3
)
 
4
5.AB.30Norsethite
BaMg(CO
 
3
)
 
2
5.AB.35Alstonite
BaCa(CO
 
3
)
 
2
5.AB.40Olekminskite
Sr(Sr,Ca,Ba)(CO
 
3
)
 
2
5.AB.40Paralstonite
BaCa(CO
 
3
)
 
2
5.AB.45Barytocalcite
BaCa(CO
 
3
)
 
2
5.AB.50Carbocernaite
(Ca,Na)(Sr,Ce,Ba)(CO
 
3
)
 
2
5.AB.55Benstonite
(Ba,Sr)
 
6
(Ca,Mn)
 
6
Mg(CO
 
3
)
 
13
5.AB.60Juangodoyite
Na
 
2
Cu(CO
 
3
)
 
2
Related Minerals - Hey's Index Grouping:

- +
11.5.2Witherite
BaCO
 
3
11.5.3Norsethite
BaMg(CO
 
3
)
 
2
11.5.4Alstonite
BaCa(CO
 
3
)
 
2
11.5.5Paralstonite
BaCa(CO
 
3
)
 
2
11.5.6Barytocalcite
BaCa(CO
 
3
)
 
2
11.5.7Benstonite
(Ba,Sr)
 
6
(Ca,Mn)
 
6
Mg(CO
 
3
)
 
13

Other Names for Strontianite

Synonyms:
Emmonsite (of Thomson)StronthianiteStrontianStrontian Spar
Other Languages:
Catalan:Estroncianita
Dutch:Strontianiet
Finnish:Strontianiitti
French:Strontianite
Strontiane carbonatée
Galician:Estroncianita
German:Strontianit
Kohlensaure Strontianerde
Silberstein
Stronthianit
Hungarian:Stroncianit
Italian:Stronzianite
Japanese:ストロンチアン鉱
Low Saxon:Strunz
Polish:Stroncjanit
Portuguese:Estroncianita
Russian:Стронцианит
Simplified Chinese:菱锶矿
碳锶矿
Slovak:Strontianit
Spanish:Stronthianita
Strontianita
Traditional Chinese:菱鍶礦
碳鍶礦
Varieties:
Emmonite

Other Information

Fluorescence in UV light:Fluorescent and phosphorescent in UV, X-rays, and electron beams.
Thermal Behaviour:Inverts to a hexagonal modification upon heating.

Thermoluminescent at times.
Other Information:Soluble in dilute HCl.

Alters to Celestine and found as an alteration of celestine.
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 Strontianite

Reference List:

- +
Sulzer (1791) Lichtenberg's Magazine: 7, 3, 68.

Sulzer (1791) Bergmännisches Journal, Freiberg (Neues Bergmännisches Journal): 1: 5, 433.

Macadam (1885) Mineralogical Magazine: 6: 173.

CAthrein (1888) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 14: 366.

Buchrucker (1891) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 19: 146.

Dana, E.S. (1892) System of Mineralogy, 6th. Edition, New York: 285.

Jackson (1894) Journal of the Chemical Society, London: 65: 734.

Mallard (1895) Bulletin de la Société française de Minéralogie: 18: 12.

Zirngibl (1897) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 27: 543.

Bary (1900) Comptes rendus de l’Académie des sciences de Paris: 130: 776.

Beykirch (1900) Neues Jahrbuch für Mineralogie, Geologie und Paleontologie, Beil.-Bd., Heidelberg, Stuttgart: 13: 427.

Kunz and Baskerville (1903) Science: 769.

Doelter, C. (1911) Handbuch der Mineral-chemie (in 4 volumes divided into parts): 1: 481.

Boeke (1913) Mitt. naturfor. Ges. Halle: 3: 10.

Goldschmidt, V. (1922) Atlas der Krystallformen. 9 volumes, atlas, and text, vol. 8: 91.

Hintze, Carl (1926) Handbuch der Mineralogie. Berlin and Leipzig. 6 volumes: 1[3A]: 3034.

Szebellédy (1926) Inaugural Dissertation, Budapest [Min. Abs.: 3: 261 (1927)].

Wilson (1928) Physical Review, a Journal of Experimental and Theoretical Physics: 31: 305.

Cork and Gerhard (1931) American Mineralogist: 16: 71.

Köhler and Leitmeier (1934) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 87: 146.

Krejci-Graf (1934) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 88: 260.

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: Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 196-200.

American Mineralogist (1971): 56: 758-772.

American Mineralogist (1976): 61: 1001.

Reviews in Mineralogy, Mineralogical Society of America: 11.

Bulletin de la Société française de Minéralogie et de Cristallographie (1988): 111: 139.

Sanchez-Pastor, N. et al. (2011): Raman study of synthetic witherite-strontianite solid solutions. Spectroscopy Letters 44(7-8), 500-504.

Internet Links for Strontianite

Search Engines:
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  • External Links:
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  • Look for Strontianite on Wikipedia
  • Look for Strontianite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Strontianite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
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  • Strontianite specimens for sale - minfind.com
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  • Specimens:The following Strontianite specimens are currently listed for sale on minfind.com.

    Localities for Strontianite

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