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

Rongibbsite

This page is currently not sponsored. Click here to sponsor this page.
Formula:
Pb2(Si4Al)O11(OH)
System:
Monoclinic
Colour:
Colorless
Hardness:
5
Name:
Named after its finder, Ronald Bradford Gibbs, a mineral collector and a mining engineer in Tucson, Arizona.
A zeolitic aluminosilicate. The first natural aluminosilicate with Pb as the only extraframework cation.


Classification of Rongibbsite

Approved
Approval Year:
2010

Type Occurrence of Rongibbsite

General Appearance of Type Material:
Elongated blades
Place of Conservation of Type Material:
Part of the co-type sample has been deposited at the University of Arizona Mineral Museum (catalog no. 19292) and the RRUFF Project (deposition no. R100031).
Geological Setting of Type Material:
Quartz vein in a Proterozoic gneiss
Associated Minerals at Type Locality:

Physical Properties of Rongibbsite

Vitreous
Diaphaneity (Transparency):
Transparent
Colour:
Colorless
Streak:
White
Hardness (Mohs):
5
Comment:
~5
Tenacity:
Brittle
Cleavage:
Perfect
on {100}
Parting:
No parting observed
Density:
4.43 g/cm3 (Calculated)

Crystallography of Rongibbsite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Space Group Setting:
C2/m
Cell Parameters:
a = 7.8356(6) Å, b = 13.913(6) Å, c = 10.278(1) Å
β = 92.925(4)°
Ratio:
a:b:c = 0.563 : 1 : 0.739
Unit Cell Volume:
V 1119 ų
Morphology:
Bladed (elongated along the c axis, up to 0.70 × 0.20 × 0.05 mm), often in tufts. Dominant forms are {100}, {010}, {001}, and {101̄}.
Twinning:
Twinning is common across (100).
X-Ray Powder Diffraction Data:
d-spacingIntensity
6.821 (78)
6.075 (100)
3.990 (99)
3.481 (81)
3.478 (82)
3.322 (76)
2.842 (91)
2.753 (87)

Optical Data of Rongibbsite

Type:
Biaxial (+)
RI values:
nα = 1.690 nβ = 1.694 nγ = 1.700
2V:
Measured: 65° (2), Calculated: 66°
Max Birefringence:
δ = 0.010
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
strong r >v

Chemical Properties of Rongibbsite

Formula:
Pb2(Si4Al)O11(OH)
All elements listed in formula:
Analytical Data:
Electron microprobe analysis
Empirical Formula:
Pb2.05(Si3.89Al1.11)O11(OH) ·

Other Names for Rongibbsite

Name in Other Languages:

Other Information

Other Information:
Insoluble in water, acetone, or hydrochloric acid
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 Rongibbsite

Reference List:
Yang, H., Jenkins, R.A., Downs, R.T., Evans, S.H., Bloch, E.M. and Halpern, A.J. (2010) Rongibbsite, IMA 2010-055. CNMNC Newsletter No. 7, February 2010, page 29 Mineralogical Magazine, 75, 27-31.

Yang, H., Downs, R.T., Evans, S.H., Jenkins, R.A., Bloch, E.M. (2013): Rongibbsite, Pb2(Si4Al)O11(OH), a new zeolitic aluminosilicate mineral with an interrupted framework from Maricopa County, Arizona, U.S.A. American Mineralogist, 98, 236-241

Internet Links for Rongibbsite

mindat.org URL:
http://www.mindat.org/min-41131.html
Please feel free to link to this page.

Localities for Rongibbsite

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.
USA (TL)
 
  • Arizona
    • Maricopa Co.
      • Big Horn Mts
Yang, H., Jenkins, R.A., Downs, R.T., Evans, S.H., Bloch, E.M. and Halpern, A.J. (2010) Rongibbsite, IMA 2010-055. CNMNC Newsletter No. 7, February 2010, page 29 Mineralogical Magazine, 75, 27-31.;Yang, H., Downs, R.T., Evans, S.H., Jenkins, R.A., Bloch, E.M. (2013): Rongibbsite, Pb2(Si4Al)O11(OH), a new zeolitic aluminosilicate mineral with an interrupted framework from Maricopa County, Arizona, U.S.A. American Mineralogist, 98, 236-241
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: December 4, 2016 12:15:58 Page generated: November 24, 2016 13:03:24
Go to top of page