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Paralstonite

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Formula:
BaCa(CO3)2
System:
Trigonal
Colour:
Colourless to white
Hardness:
4 - 4½
Polymorph of:

Classification of Paralstonite

Approved
5.AB.40

5 : CARBONATES (NITRATES)
A : Carbonates without additional anions, without H2O
B : Alkali-earth (and other M2+) carbonates
14.2.2.2

14 : ANHYDROUS NORMAL CARBONATES
2 : AB(XO3)2
11.5.5

11 : Carbonates
5 : Carbonates of Sr and Ba
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First Recorded Occurrence of Paralstonite

Year of Discovery:
1979
Associated Minerals at First Recorded Locality:

Physical Properties of Paralstonite

Vitreous
Colour:
Colourless to white
Hardness (Mohs):
4 - 4½

Crystallography of Paralstonite

Crystal System:
Trigonal
Cell Parameters:
a = 8.69Å, c = 6.14Å
Ratio:
a:c = 1 : 0.707
Unit Cell Volume:
V 401.55 ų (Calculated from Unit Cell)
Morphology:
Crusts composed of tiny pyramidal crystals to 1 mm.

Optical Data of Paralstonite

Type:
Uniaxial (-)
RI values:
nω = 1.672 nε = 1.527
Max Birefringence:
δ = 0.145
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of Paralstonite

Formula:
BaCa(CO3)2
Essential elements:
All elements listed in formula:
Common Impurities:
Sr

Relationship of Paralstonite to other Species

Series:
Forms a series with Olekminskite (see here)
5.AB.05CalciteCaCO3
5.AB.05Gaspéite(Ni,Mg,Fe)CO3
5.AB.05MagnesiteMgCO3
5.AB.05OtaviteCdCO3
5.AB.05RhodochrositeMnCO3
5.AB.05SideriteFeCO3
5.AB.05SmithsoniteZnCO3
5.AB.05SpherocobaltiteCoCO3
5.AB.10AnkeriteCa(Fe2+,Mg)(CO3)2
5.AB.10DolomiteCaMg(CO3)2
5.AB.10KutnohoriteCa(Mn,Mg,Fe)(CO3)2
5.AB.10MinrecorditeCaZn(CO3)2
5.AB.15AragoniteCaCO3
5.AB.15CerussitePbCO3
5.AB.15StrontianiteSrCO3
5.AB.15WitheriteBaCO3
5.AB.20VateriteCaCO3
5.AB.25HuntiteCaMg3(CO3)4
5.AB.30NorsethiteBaMg(CO3)2
5.AB.35AlstoniteBaCa(CO3)2
5.AB.40OlekminskiteSr(Sr,Ca,Ba)(CO3)2
5.AB.45BarytocalciteBaCa(CO3)2
5.AB.50Carbocernaite(Ca,Na)(Sr,Ce,Ba)(CO3)2
5.AB.55Benstonite(Ba,Sr)6(Ca,Mn)6Mg(CO3)13
5.AB.60JuangodoyiteNa2Cu(CO3)2
11.5.1StrontianiteSrCO3
11.5.2WitheriteBaCO3
11.5.3NorsethiteBaMg(CO3)2
11.5.4AlstoniteBaCa(CO3)2
11.5.6BarytocalciteBaCa(CO3)2
11.5.7Benstonite(Ba,Sr)6(Ca,Mn)6Mg(CO3)13

Other Names for Paralstonite

Name in Other Languages:

Other Information

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 Paralstonite

Reference List:
American Mineralogist (1979): 64: 1332.

American Mineralogist (1981): 66: 219.

Neues Jahrbuch für Mineralogie, Monatshefte (1980): 353-363.

Internet Links for Paralstonite

Localities for Paralstonite

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 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.
China
 
  • Inner Mongolia Autonomous Region
    • Baotou League (Baotou Prefecture)
      • Bayan Obo Mining District
        • Bayan Obo
Zhang Peishan, Yang Zhuming, Tao Kejie, and Yang Xueming (1996): Mineralogy and Geology of Rare Earths in China. Science Press (Beijing), pp. 226.
Russia
 
  • Eastern-Siberian Region
    • Sakha Republic (Saha Republic; Yakutia)
      • Aldan Shield
        • Chara and Tokko Rivers Confluence
[Lapis 1993:4 p.13-20]
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
  • Northern Region
    • Murmanskaja Oblast'
      • Kola Peninsula
Sorokhtina, N.V., Chukanov, N.V., Voloshin, A.V., Pakhomovsky, Y.A., Bogdanova, A.N., and Moiseev, M.M. (2008): Geology of Ore Deposits 50(7), 620-628.
UK
 
  • Wales
    • Powys (Radnorshire)
      • Old Radnor
        • Wethel
T.F. Cotterell : "The mineralogy of Dolyhir quarry, Old Radnor, Powys, Wales, U.K. - a major new mineralogical site in Wales", 5th International Conference "Mineralogy & Museums", Paris, Sept. 5-8th 2004, Bull. de Liaison de la Soc. Franç. de Minéralogie et Cristallographie, 2004, Vol 16, N°2.; Cotterell TF et al (2011) The mineralogy of Dolyhir quarry, Old Radnor. Powys, Wales. UKJMM 32:5-61
USA
 
  • Illinois
    • Hardin Co.
      • Illinois - Kentucky Fluorspar District
        • Cave-in-Rock Sub-District
Mineralogical Record, v. 28, no. 1, 1997
A. C. Roberts (1979) Paralstonite, a new mineral from the Minerva no. 1 mine, Cave-in-Rock, Illinois. Geol. Surv. Can. Pap.,79-lC, 99-100.; Mineralogical Record (1997) 28:3-49
        • Harris Creek Sub-District
Mineralogical Record (1997) 28:3-49
Mineral and/or Locality  
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