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 ReportCoordinate Completion ReportAdd Glossary Item
StatisticsThe ElementsMember 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

Piemontite-(Pb)

This page is currently not sponsored. Click here to sponsor this page.
Formula:
{CaPb}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
System:
Monoclinic
Colour:
purplish-red
Hardness:
6
Name:
For the mineral piemontite and its lead content.
This page provides mineralogical data about Piemontite-(Pb).

Classification of Piemontite-(Pb)

Approved
Approval Year:
2011
mindat.org URL:
http://www.mindat.org/min-42876.html
Please feel free to link to this page.

Type Occurrence of Piemontite-(Pb)

General Appearance of Type Material:
imperfect blocky crystals to 2mm
Place of Conservation of Type Material:
Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow,Russia, registration number 4193/1
Geological Setting of Type Material:
dolomitic marbles and barite schists

Physical Properties of Piemontite-(Pb)

Vitreous
Colour:
purplish-red
Streak:
pink
Hardness (Mohs):
6
Tenacity:
Brittle
Cleavage:
Perfect
perfect on (001), and distinct on (010).
Density:
4.282 g/cm3 (Calculated)

Crystallography of Piemontite-(Pb)

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Space Group Setting:
P21/m
Cell Parameters:
a = 8.938(1) Å, b = 5.6810(6) Å, c = 10.289(1) Å
β = 114.17(1)°
Ratio:
a:b:c = 1.573 : 1 : 1.811
Unit Cell Volume:
V 476.64 ų (Calculated from Unit Cell)
Z:
2
X-Ray Powder Diffraction Data:
d-spacingIntensity
8.12(68)
4.67(53)
3.518(77)
2.931(100)
2.843(51)
2.736(57)
2.619(66)
2.122(46)

Optical Data of Piemontite-(Pb)

Type:
Biaxial (-)
RI values:
nα = 1.835(10) nβ = 1.885(10) nγ = 1.895(10)
2V:
Measured: 30° to 40°, Calculated: 47°
Max Birefringence:
δ = 0.060
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
very strong, r>v.
Pleochroism:
Visible
Comments:
Z (red-brown)>Y (light red-brown)>X (light lilac)

Chemical Properties of Piemontite-(Pb)

Formula:
{CaPb}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
All elements listed in formula:

Relationship of Piemontite-(Pb) to other Species

Other Members of Group:
Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Epidote-(Sr){CaSr}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Hancockite{CaPb}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Mukhinite{Ca2}{Al2V3+}(Si2O7)(SiO4)O(OH)
Niigataite{CaSr}{Al3}(Si2O7)(SiO4)O(OH)
Piemontite{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Piemontite-(Sr){CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Tweddillite{CaSr}{Mn3+AlMn3+}(Si2O7)(SiO4)O(OH)

Other Names for Piemontite-(Pb)

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 Piemontite-(Pb)

Reference List:
Bermanec, Vladimir., Armbruster, Thomas., Oberhänsli, Roland (1994): Crystal chemistry of Pb- and REE-rich piemontite from Nezilovo, Macedonia. Schweizerische mineralogische und petrographische Mitteilungen. Vol 74, pp 321-328

Chukanov, N.V., Varlamov, D.A., Nestola, F., Belakovskiy, D., Goettlicher, J.,
Britvin, S., Lanza, A. and Jancev, S. (2012):Piemontite-(Pb), IMA 2011-087. CNMNC Newsletter No. 12, February 2012, page 154; Mineralogical Magazine, 76, 151-155

Chukanov, N. V., Varlamov, D. A., Nestola, F., Belakovskiy, D. I., Goettlicher, J., Britvin, S. N., ... & Jancev, S. (2012). Piemontite-(Pb), CaPbAl2Mn3+ [Si2O7][SiO4] O (OH), a new mineral species of the epidote supergroup. Neues Jahrbuch für Mineralogie-Abhandlungen: Journal of Mineralogy and Geochemistry, 189(3), 275-286.

Internet Links for Piemontite-(Pb)

Localities for Piemontite-(Pb)

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.
Republic of Macedonia (TL)
 
  • Veles
    • Nežilovo
      • Jakupica Mts
        • Babuna Valley
Chukanov, N. V., Varlamov, D. A., Nestola, F., Belakovskiy, D. I., Goettlicher, J., Britvin, S. N., ... & Jancev, S. (2012). Piemontite-(Pb), CaPbAl2Mn3+ [Si2O7][SiO4] O (OH), a new mineral species of the epidote supergroup. Neues Jahrbuch für Mineralogie-Abhandlungen: Journal of Mineralogy and Geochemistry, 189(3), 275-286
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 1993-2016, 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 26, 2016 07:45:34 Page generated: August 24, 2016 01:07:26
Go to top of page