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

Balangeroite

This page is currently not sponsored. Click here to sponsor this page.
Formula:
(Mg,Fe2+,Fe3+,Mn2+)42Si16O54(OH)40
System:
Monoclinic
Colour:
Brown
Lustre:
Vitreous
Name:
Named for the type locality in the Balangero - Corio area, Torino Province, Piedmont, Italy.
Two polytypes are known, 2M and 1A (Bonaccorsi et al., 2012).

Classification of Balangeroite

Approved
9.DH.35

9 : SILICATES (Germanates)
D : Inosilicates
H : Inosilicates with 4-periodic single chains, Si4O12
65.3.2.1

65 : INOSILICATES Single-Width,Unbranched Chains,(W=1)
3 : Single-Width Unbranched Chains, W=1 with chains P=4
14.21.14

14 : Silicates not Containing Aluminum
21 : Silicates of Fe and Mg
mindat.org URL:
http://www.mindat.org/min-492.html
Please feel free to link to this page.

Type Occurrence of Balangeroite

Year of Discovery:
1983

Physical Properties of Balangeroite

Vitreous
Colour:
Brown

Crystallography of Balangeroite

Polytype:
Formula:
Crystal System:
Class (H-M)
Space Group:
Space Group Setting:
Cell Parameters:
Ratio:
Unit Cell Volume (calc):
Z:
Balangeroite-1ABalangeroite-2M
  
Triclinic Monoclinic 
1 - Pinacoidal2/m - Prismatic
P1 
  
a = 9.602Å, b = 13.891Å, c = 14.012Å
α = 86.99°, β = 76.79°, γ = 76.67°
a = 19.179Å, b = 9.601Å, c = 19.218Å
β = 90.52°
a:b:c = 0.691 : 1 : 1.009a:b:c = 1.998 : 1 : 2.002
 V 3,538.61 ų
(Calculated from Unit Cell)
  

Optical Data of Balangeroite

Type:
Biaxial
RI values:
nα = 1.680 nγ = 1.680
Max Birefringence:
δ = 0.000
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r > v strong

Chemical Properties of Balangeroite

Formula:
(Mg,Fe2+,Fe3+,Mn2+)42Si16O54(OH)40
Essential elements:
All elements listed in formula:
Common Impurities:
Ti,Al,Cr,Ca

Relationship of Balangeroite to other Species

9.DH.05LeucophaniteNaCaBeSi2O6F
9.DH.10OhmiliteSr3(Ti,Fe3+)(Si4O12)(O,OH) · 2-3H2O
9.DH.15HaradaiteSrVSi2O7
9.DH.15SuzukiiteBaVSi2O7
9.DH.20BatisiteBaNaNaTi2(Si4O12)O2
9.DH.20Shcherbakovite(K,Ba)KNa(Ti,Nb)2(Si4O12)O2
9.DH.25TaikaniteSr3BaMn22+(Si4O12)O2
9.DH.30KrauskopfiteBaSi2O5 · 3H2O
9.DH.35GageiteMn21(Si4O12)2O3(OH)20
9.DH.40AenigmatiteNa2Fe52+Ti(Si6O18)O2
9.DH.40DorriteCa4(Mg3Fe93+)O4(Si3Al8Fe3+O36)
9.DH.40Høgtuvaite(Ca,Na)2(Fe2+,Fe3+,Ti)6[O2|Be(Si,Al)5O18]
9.DH.40KrinoviteNa2Mg4Cr23+(Si6O18)O2
9.DH.40Makarochkinite(Ca,Na)2Fe42+Fe3+Ti[O2|BeAlSi4O18]
9.DH.40RhöniteCa2(Mg,Fe2+,Fe3+,Ti)6[O2|(Si,Al)6O18]
9.DH.40Serendibite(Ca,Na)2(Mg,Fe2+)3(Al,Fe3+)3[O2|(Si,Al,B)6O18]
9.DH.40WelshiteCa4Mg9Sb3O4[Si6Be3AlFe2O36]
9.DH.40WilkinsoniteNa2Fe42+Fe23+(Si6O18)O2
9.DH.45Sapphirine(Mg,Fe)4-xAl4+x[Al4+xSi2-xO18]O2
9.DH.50Khmaralite(Mg,Al,Fe)16[(Al,Si,Be)12O36]O4
9.DH.55Surinamite(Mg,Fe)3Al4BeSi3O16
9.DH.60Deerite(Fe,Mn)6(Fe,Al)3[Si6O17]O3(OH)5
9.DH.65HowieiteNa(Fe,Mn)10(Fe,Al)2Si12O31(OH)13
9.DH.65Taneyamalite(Na,Ca)(Mn,Mg,Fe)12Si12(O,OH)44
9.DH.70JohninnesiteNa2Mn92+Mg7(OH)8[AsO4]2[Si6O17]2
9.DH.75AgrelliteNaCa2Si4O10F
14.21.1Olivine(Mg,Fe2+)2SiO4
14.21.2Ringwoodite(Mg,Fe2+)2SiO4
14.21.3Wadsleyite(Mg,Fe2+)2(SiO4)
14.21.4ClinoferrosiliteFe2+SiO3
14.21.5Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
14.21.6Cummingtonite☐{Mg2}{Mg5}(Si8O22)(OH)2
14.21.7 Magnesiocummingtonite
14.21.8Grunerite☐{Fe22+}{Fe52+}(Si8O22)(OH)2
14.21.9Minnesotaite(Fe,Mg)3(Si4O10)(OH)2
14.21.10Chesterite(Mg,Fe)17Si20O54(OH)6
14.21.11Jimthompsonite(Mg,Fe)5Si6O16(OH)2
14.21.12Clinojimthompsonite(Mg,Fe)5Si6O16(OH)2
14.21.13MajoriteMg3(Fe2+,Si,Al)2(SiO4)3

Other Names for Balangeroite

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 Balangeroite

Reference List:
Compagnoni, R., G. Ferraris, and L. Fiori (1983): Balangeroite, a new fibrous silicate related to gageite from Balangero, Italy. American Mineralogist, 68, 214-219.

Ferraris, G., M. Mellini, and S. Merlino (1987): Electron-diffraction and electron-microscopy study of balangeroite and gageite: crystal structures, polytypism, and fiber texture. American Mineralogist, 72, 382-391.

Belluso, E. and G. Ferraris (1991): New data on balangeroite and carlosturanite from alpine serpentinites. Eur. J. Mineral., 3, 559-566.

Bonaccorsi, E., Ferraris, G., Merlino, S. (2012): Crystal structure of 2M and 1A polytypes of balangeroite. Zeitschrift für Kristallographie, 227, 460-467.

Internet Links for Balangeroite

Specimens:
The following Balangeroite specimens are currently listed for sale on minfind.com.

Localities for Balangeroite

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.
Italy
 
  • Piedmont
    • Torino Province
      • Ceronda Valley
        • Varisella
Belluso, E., Compagnoni, R., Ferraris, G. (1995): Occurrence of asbestiform minerals in the serpentinites of the Piemonte zone, western Alps. “Giornata di studio in ricordo del Prof. Stefano Zucchetti”, Politecnico di Torino, Dipartimento Georisorse e Territorio, 12 Maggio 1994. Contribution volume, Tipolitografia Edicta, Torino, 57-66.
      • Lanzo Valleys
        • Balangero
1) Compagnoni, R., Ferraris, G., Fiora, L. (1983): Balangeroite, a new fibrous silicate related to gageite from Balangero. American Mineralogist, 67, 214-219. 2) Prete, R. (1995): L'amiantifera di S. Vittore, Balangero, Torino. Rivista Mineralogica Italiana, 4/1995, 313-333.
        • Lanzo Torinese
Belluso, E., Compagnoni, R., Ferraris, G. (1995): Occurrence of asbestiform minerals in the serpentinites of the Piemonte zone, western Alps. “Giornata di studio in ricordo del Prof. Stefano Zucchetti”, Politecnico di Torino, Dipartimento Georisorse e Territorio, 12 Maggio 1994. Contribution volume, Tipolitografia Edicta, Torino, 57-66.
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: August 30, 2015 04:37:25 Page generated: August 30, 2015 01:18:52