Help mindat.org|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on MindatThe Mindat Store
Minerals by PropertiesMinerals by ChemistryRandom MineralSearch by minIDLocalities Near MeSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportAdd Glossary Item
StatisticsMember ListBooks & MagazinesMineral Shows & EventsThe Mindat DirectoryHow to Link to MindatDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Pinakiolite

This page is currently not sponsored. Click here to sponsor this page.
Formula:
(Mg,Mn2+)2Mn3+(BO3)O2
System:
Monoclinic
Colour:
Black; deep reddish ...
Hardness:
6
Name:
From the Greek πινάκιον, a small tablet, and λίθος, stone, in allusion to the thin tabular shape of the crystals.
Dimorph of:
The monoclinic dimorph of Orthopinakiolite.

Classification of Pinakiolite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
6.AB.35

6 : BORATES
A : Monoborates
B : BO3, with additional anions; 1(D) + OH, etc.
24.2.4.1

24 : ANHYDROUS BORATES
2 : A2BO2[XO3]
9.7.1

9 : Borates
7 : Borates of Mn
mindat.org URL:
http://www.mindat.org/min-3214.html
Please feel free to link to this page.

Type Occurrence of Pinakiolite

General Appearance of Type Material:
Bands in matrix.
Year of Discovery:
1890
Geological Setting of Type Material:
Bands in granular dolomite.
Associated Minerals at Type Locality:

Physical Properties of Pinakiolite

Metallic
Diaphaneity (Transparency):
Opaque
Colour:
Black; deep reddish brown in transmitted light
Streak:
Brown-gray
Hardness (Mohs):
6
Tenacity:
Very brittle
Cleavage:
Distinct/Good
On {010}.
Density:
3.88 g/cm3 (Measured)    

Crystallography of Pinakiolite

Crystal System:
Monoclinic
Cell Parameters:
a = 5.36Å, b = 5.98Å, c = 12.73Å
β = 120.57°
Ratio:
a:b:c = 0.896 : 1 : 2.129
Unit Cell Volume:
V 351.32 ų (Calculated from Unit Cell)
Morphology:
Thin rectangular tablets {010}. Short prismatic [001], rare. Crystals often bent or broken.
Twinning:
On {011} common as contact and/or cruciform interpenetrant twins.

Optical Data of Pinakiolite

Type:
Biaxial (-)
RI values:
nα = 1.908 nβ = 2.050 nγ = 2.650
2V:
Measured: 31° to 33°, Calculated: 64°
Max Birefringence:
δ = 0.742
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r < v
Pleochroism:
Visible
Comments:
X = Deep reddish brown
Y = Nearly opaque
Z = Reddish yellow

Chemical Properties of Pinakiolite

Formula:
(Mg,Mn2+)2Mn3+(BO3)O2
Essential elements:
All elements listed in formula:

Relationship of Pinakiolite to other Species

Other Members of Group:
Aluminomagnesiohulsite(Mg,Fe2+)2(Al,Mg,Sn)(BO3)O2
Hulsite(Fe2+,Mg)2(Fe3+,Sn)(BO3)O2
Magnesiohulsite(Mg,Fe2+)2(Fe3+,Sn,Mg)(BO3)O2
6.AB.05HambergiteBe2(BO3)(OH)
6.AB.10BerboriteBe2(BO3)(OH,F) · H2O
6.AB.15JeremejeviteAl6(BO3)5(F,OH)3
6.AB.20Warwickite(Mg,Fe2+)3Ti(BO3)2O2
6.AB.20YuanfuliiteMg(Fe3+,Fe2+,Al,Ti,Mg)(BO3)O
6.AB.25KarliteMg7(BO3)3(OH,Cl)5
6.AB.30Azoproite(Mg,Fe2+)2(Fe3+,Ti,Mg)(BO3)O2
6.AB.30BonaccorditeNi2Fe3+(BO3)O2
6.AB.30FredrikssoniteMg2(Mn3+,Fe3+)(BO3)O2
6.AB.30LudwigiteMg2Fe3+(BO3)O2
6.AB.30VonseniteFe22+Fe3+(BO3)O2
6.AB.40Blatterite(Mn2+,Mg)2(Mn3+,Sb3+,Fe3+)(BO3)O2
6.AB.40ChestermaniteMg2(Fe3+,Mn3+,Al,Sb3+)(BO3)O2
6.AB.40Orthopinakiolite(Mg,Mn2+)2Mn3+(BO3)O2
6.AB.40Takéuchiite(Mg,Mn2+)2(Mn3+,Fe3+)(BO3)O2
6.AB.45Hulsite(Fe2+,Mg)2(Fe3+,Sn)(BO3)O2
6.AB.45Magnesiohulsite(Mg,Fe2+)2(Fe3+,Sn,Mg)(BO3)O2
6.AB.45Aluminomagnesiohulsite(Mg,Fe2+)2(Al,Mg,Sn)(BO3)O2
6.AB.50FluoboriteMg3(BO3)(F,OH)3
6.AB.50HydroxylboriteMg3(BO3)(OH)3
6.AB.55ShabyniteMg5(BO3)(OH)5(Cl,OH)2 · 4H2O
6.AB.55WightmaniteMg5(BO3)O(OH)5 · 2H2O
6.AB.60GaudefroyiteCa4Mn3+2-3(BO3)3(CO3)(O,OH)3
6.AB.65SakhaiteCa12Mg4(BO3)7(CO3)4(OH)2Cl
6.AB.70HarkeriteCa12Mg4Al(BO3)3(SiO4)4(CO3)5 · H2O
6.AB.75Pertsevite-(F)Mg2(BO3)(F,OH)
6.AB.75Pertsevite-(OH)Mg2(BO3)(OH)
6.AB.80JacquesdietrichiteCu2(H2BO3)(OH)3
6.AB.85PainiteCaZrAl9(BO3)O15
9.7.2Orthopinakiolite(Mg,Mn2+)2Mn3+(BO3)O2
9.7.3Jimboite(Mn2+,Mg)3[BO3]2
9.7.4SussexiteMn2+BO2(OH)
9.7.5Wiserite(Mn,Mg)14[Cl|(OH)8|(Si,Mg)(O,OH)4|(B2O5)4]
9.7.6KurchatoviteCa(Mg,Mn2+)[B2O5]
9.7.7ClinokurchatoviteCa(Mg,Fe2+,Mn2+)[B2O5]
9.7.8Takéuchiite(Mg,Mn2+)2(Mn3+,Fe3+)(BO3)O2
9.7.9Blatterite(Mn2+,Mg)2(Mn3+,Sb3+,Fe3+)(BO3)O2
9.7.10TusioniteMn2+Sn4+[BO3]2

Other Names for Pinakiolite

Name in Other Languages:

Other Information

Other Information:
Soluble in concentrated HCl with the evolution of elemental chlorine.
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 Pinakiolite

Reference List:
Flink (1890) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 18: 361 (as Pinakiolith).

Bäckström (1895) Geologiska Föeningens I Stockholm. Förhandlinger, Stockholm: 17: 257.

Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679: 120.

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: 324-325.

American Mineralogist (1974): 59: 985-1004.

American Mineralogist (1986): 71: 227.

Zeitschrift für Kristallographie: 191: 105-116.

Acta Crystallographica: 3: 98-107.

Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

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.

Internet Links for Pinakiolite

Localities for Pinakiolite

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.
Canada
 
  • Nova Scotia
    • Lunenburg Co.
      • New Ross
D.G. Bishop and J.D. Wright, "Geology and Trace Element Studies of Manganese Occurrences in Nova Scotia", N.S. Dept. of Mines, Economic Geology Series 74-1, 1974.
Romania
 
  • Caraş-Severin Co.
    • Banat Mts
      • Ocna de Fier-Dognecea District
http://minerals-of-the-carpathians.eu
Sweden
 
  • Värmland
    • Filipstad
Zeits.Krist.Min.(1890) 18, 361-365; 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: 325; 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.
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2015, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: May 22, 2015 20:17:15 Page generated: May 17, 2015 15:26:34