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Benstonite

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About BenstoniteHide

Formula:
Ba6Ca6Mg(CO3)13
Ba may be replaced by minor Sr, and Ca by minor Mn.
Colour:
White to ivory, very pale yellow, pale yellowish brown
Lustre:
Vitreous
Hardness:
3 - 4
Specific Gravity:
3.956
Crystal System:
Trigonal
Name:
Named in honor of Orlando J. Benston (February 1901, Whalan, Minnesota, USA - 20 January 1966, Malvern, Arkansas, USA), an ore dressing metallurgist for the Baroid Division, National Lead Co., Malvern, Arkansas, USA, who supplied the first specimens.
This page provides mineralogical data about Benstonite.


Classification of BenstoniteHide

Approved
First Published:
1961
5.AB.55

5 : CARBONATES (NITRATES)
A : Carbonates without additional anions, without H2O
B : Alkali-earth (and other M2+) carbonates
14.2.3.1

14 : ANHYDROUS NORMAL CARBONATES
2 : AB(XO3)2
11.5.7

11 : Carbonates
5 : Carbonates of Sr and Ba

Physical Properties of BenstoniteHide

Vitreous
Transparency:
Translucent
Colour:
White to ivory, very pale yellow, pale yellowish brown
Streak:
White
Hardness:
3 - 4 on Mohs scale
Cleavage:
Distinct/Good
Good on (31_42)
Density:
3.956 g/cm3 (Measured)    3.695 g/cm3 (Calculated)

Optical Data of BenstoniteHide

Type:
Uniaxial (-)
RI values:
nω = 1.690 nε = 1.527
Max Birefringence:
δ = 0.163
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of BenstoniteHide

Formula:
Ba6Ca6Mg(CO3)13

Ba may be replaced by minor Sr, and Ca by minor Mn.

Crystallography of BenstoniteHide

Crystal System:
Trigonal
Class (H-M):
3 - Rhombohedral
Space Group:
R3
Cell Parameters:
a = 18.280 Å, c = 8.652 Å
Ratio:
a:c = 1 : 0.473
Unit Cell V:
2,503.80 ų (Calculated from Unit Cell)
Z:
3
Morphology:
Rhombohedral crystals to 1cm.

X-Ray Powder DiffractionHide

Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Geological EnvironmentHide

Geological Setting:
Barite deposits

Type Occurrence of BenstoniteHide

General Appearance of Type Material:
white cleavable masses
Reference:
Lippmann, F. (1961) Benstonit, Ca7Ba6(CO3)13, ein neues mineral. Naturwissenschaften: 16: 550-551.

Other Language Names for BenstoniteHide

German:Benstonit
Simplified Chinese:菱碱土矿
Spanish:Benstonita

Common AssociatesHide

Associated Minerals Based on Photo Data:
20 photos of Benstonite associated with FluoriteCaF2
14 photos of Benstonite associated with CalciteCaCO3
6 photos of Benstonite associated with AlstoniteBaCa(CO3)2
4 photos of Benstonite associated with BaryteBaSO4
3 photos of Benstonite associated with SphaleriteZnS

Related Minerals - Nickel-Strunz GroupingHide

5.AB.05CalciteCaCO3Trig. 3m (3 2/m) : R3c
5.AB.05GaspéiteNi(CO3)Hex.
5.AB.05MagnesiteMgCO3Trig. 3m (3 2/m) : R3c
5.AB.05OtaviteCdCO3Trig. 3m (3 2/m)
5.AB.05RhodochrositeMnCO3Trig. 3m (3 2/m) : R3c
5.AB.05SideriteFeCO3Trig. 3m (3 2/m) : R3c
5.AB.05SmithsoniteZnCO3Trig. 3m (3 2/m) : R3c
5.AB.05SpherocobaltiteCoCO3Trig. 3m (3 2/m) : R3c
5.AB.10AnkeriteCa(Fe2+,Mg)(CO3)2Trig. 3 : R3
5.AB.10DolomiteCaMg(CO3)2Trig. 3 : R3
5.AB.10KutnohoriteCaMn2+(CO3)2Trig. 3 : R3
5.AB.10MinrecorditeCaZn(CO3)2Trig. 3 : R3
5.AB.15AragoniteCaCO3Orth. mmm (2/m 2/m 2/m)
5.AB.15CerussitePbCO3Orth. mmm (2/m 2/m 2/m)
5.AB.15StrontianiteSrCO3Orth. mmm (2/m 2/m 2/m)
5.AB.15WitheriteBaCO3Orth. mmm (2/m 2/m 2/m)
5.AB.20VateriteCaCO3Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
5.AB.25HuntiteCaMg3(CO3)4Trig. 3 2 : R3 2
5.AB.30NorsethiteBaMg(CO3)2Trig. 3 2 : R3 2
5.AB.35AlstoniteBaCa(CO3)2Tric.
5.AB.40OlekminskiteSr(Sr,Ca,Ba)(CO3)2Trig. 3 2 : P3 2 1
5.AB.40ParalstoniteBaCa(CO3)2Trig.
5.AB.45BarytocalciteBaCa(CO3)2Mon. 2/m : P21/m
5.AB.50Carbocernaite(Ca,Na)(Sr,Ce,Ba)(CO3)2Orth. mm2
5.AB.60JuangodoyiteNa2Cu(CO3)2Mon. 2/m : P21/b

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

11.5.1StrontianiteSrCO3Orth. mmm (2/m 2/m 2/m)
11.5.2WitheriteBaCO3Orth. mmm (2/m 2/m 2/m)
11.5.3NorsethiteBaMg(CO3)2Trig. 3 2 : R3 2
11.5.4AlstoniteBaCa(CO3)2Tric.
11.5.5ParalstoniteBaCa(CO3)2Trig.
11.5.6BarytocalciteBaCa(CO3)2Mon. 2/m : P21/m

Fluorescence of BenstoniteHide

Red or yellow in SW and LW and X-rays.
Red phosphorescence.

Other InformationHide

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 BenstoniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Lippmann, F. (1961) Benstonit, Ca7Ba6(CO3)13, ein neues mineral. Naturwissenschaften: 16: 550-551.
Fleischer, M. (1961) New mineral names. American Mineralogist: 46: 1513-1520.
Lippmann, F. (1962) Benstonite, Ca7Ba6(CO3)13, a new mineral from the barite deposit in Hot Spring County, Arkansas. American Mineralogist: 47: 585-598.
Fleischer, M. (1963) New mineral names. American Mineralogist: 48: 433-437.
International Mineralogical Association (1967) Commission on new minerals and mineral names. Mineralogical Magazine: 36: 131-136.
Welin, E. (1968) Notes on the mineralogy of Sweden 6. X-ray powder data for minerals from Långban and the related mineral deposits of Central Sweden. Arkiv för Mineralogi och Geologi: 4: 499-541.
White, J.S., Jr. and Jarosewich, E. (1970) Second occurrence of benstonite. Mineralogical Record: 1: 140–141.
Effenberger, H. (1979) Kristallstruktur und chemische Formel des Benstonits, Ba6Ca6Mg(CO3)13. Neues Jahrbuch für Mineralogie, Abhandlungen: 136: 326-337.
Konev, A.A., Kartashev, P.M., Koneva, A.A., Ushchapovskaya, Z.F., Nartova, N.V. (2004) Mg-deficient strontium benstonite from the ore occurrence Biraya (Siberia). Zapiski Vserossijskogo Mineralogicheskogo Obshchestva: 133(6): 65-73.

Internet Links for BenstoniteHide

Localities for BenstoniteHide

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.
Canada
 
  • Saskatchewan
Shang, Y. (2000). Mineralogy, lithostratigraphy and geochemistry of North Ingebright Lake, Saskatchewan, Canada. PhD thesis University of Manitoba.
  • Yukon
    • Watson Lake mining district
      • Macmillan Pass
Econ Geol (1985) 80:1257-1276
Econ Geol (1989)84:841-856
China
 
  • Inner Mongolia
    • Baotou City (Baotou Prefecture)
      • Bayan Obo mining district
        • Bayan Obo
          • Bayan Obo deposit (Bayun-Obo deposit; Baiyunebo deposit)
Youbin Liang, Zhonglong Xu, and Zhiyin Hu (1981): Geology and Prospecting 17(9), 29-33
Greece
 
  • East Macedonia and Thrace
    • Evros
Skarpelis, N., & Triantafyllidis, S. (2004). Environmental impact from supergene alteration and exploitation of a high sulphidation epithermal type mineralisation (Kirki, NE Greece). Applied Earth Science, 113(1), 110-116.
India
 
  • Tamil Nadu
    • Krishnagiri District
Srivastava, R. K. (1998). Petrology of the Proterozoic alkaline carbonatite complex of Samalpatti, district Dharmapuri, Tamil Nadu. JOURNAL-GEOLOGICAL SOCIETY OF INDIA, 51, 233-244. Subramaniam, V., Viladkar, S. G., & Upendran, R. (1978). Carbonatite Alkali Complex of Samalpatti Dharmapuri District, Tamil Nadu. Geological Society of India, 19(5), 206-216. Semenov, E. I., Gopal, V., & SUBRAMANIAN, V. (1971). A note on the occurrence of benstonite, a carbonate of calcium and barium from the carbonatite complex at Jogipatti, near Samalpatti, Dharmapuri District, Tamil Nadu. Current Science, 254-256.
    • Salem District
Kumar, A., Gopalan, K., Rao, K.R.P. & Nayak, S.S. (2001). Rb-Sr ages of kimberlites and lamproites from Eastern Dharwar craton, South India. J. Geol. Soc. India, 58, 135-142.
    • Vellore District
      • Tiruppattur
Pavel M. Kartashov data
Italy
 
  • Tuscany
    • Lucca Province
      • Stazzema
        • Sant'Anna di Stazzema
Biagioni, C. & Orlandi, P. (2010). Cymrite and benstonite from the Monte Arsiccio mine (Apuan Alps, Tuscany, Italy): first Italian occurrence. Plinius, 36, 365.
Namibia
 
  • ǁKaras Region
    • Oranjemund
      • Rosh Pinah
Econ Geol (1985) 80:1257-1276; Von Bezing, L., Bode, R., and Jahn, S., (2008) Namibia Minerals and Localities. Edition Schloss Freudenstein, Bode Verlag GmbH, Haltern, pg 472 (in English).
Romania
 
Hirtopanu, P. (2006). One hundred minerals for one hundred years (dedicated to the Centennial of the Geological Institute of Romania). In 3rd Conference on Mineral Sciences in the Carpathians, Miskolc Hungary. Acta Mineralogica–Petrographica, Abstract series (Vol. 5, p. 86).
Russia
 
  • Irkutsk Oblast
    • Vitim Plateau
      • Biraya and Bya Rivers confluence area (Chara Basin)
Konev A A, Kartashev P M, Koneva A A, Ushchapovskaya Z F, Nartova N V (2004): Mg-deficient strontium benstonite from the ore occurrence Biraya (Siberia). Zapiski Vserossijskogo Mineralogicheskogo Obshchestva, 133 (6), 65-73. Koneva A.A., Konev A.A., Vladykin N.V. (2010) Vein complex of the Biraya carbonatite deposit. in Abstracts of XXVII International conference School «Geochemistry of Alkaline rocks». – Moscow-Koktebel’. pp. 240 pp.
Konev A. A. ; Kartashev P. M. ; Koneva A. A. ; Ushchapovskaya Z. F. ; Nartova N. V. (2004) Mg-deficient strontium benstonite from the ore occurrence biraya (Siberia). Zapiski Vserossijskogo mineralogičeskogo obŝestva 133:65-73
  • Sakha Republic (Yakutia)
    • Aldan Shield
      • Chara and Tokko Rivers Confluence
Handbook of Mineralogy
Sweden
 
  • Värmland County
    • Filipstad
Nysten, P., Holtstam, D. and Jonsson, E. (1999) The Långban minerals. In Långban - The mines,their minerals, geology and explorers (D. Holtstam and J. Langhof, eds.), Swedish Museum of Natural History and Raster Förlag, Stockholm & Chr. Weise Verlag, Munich, pp. 89-183.
USA
 
  • Arkansas
    • Hot Spring Co.
      • Magnet Cove
        • Chamberlain Creek Valley
Rocks & Min.:63:108; Scull(1959).
American Mineralogist: 47: 585-598.
Smith, A.E., Jr., 1996: Collecting Arkansas Minerals: A Reference and Guide
  • Illinois
    • Hardin Co.
Mineralogical Record, v. 28, no. 1, 1997
        • Ozark-Mahoning group
Rocks & Minerals: 63: 217.; Mineralogical Record (1997) 28:3-49
  • Texas
    • Houston Co.
R&M 66:3 pp 196-224
R&M 66:3 pp 196-224
R&M 66:3 pp 196-224
 
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