Donate now to keep mindat.org alive!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 Mindat
What is a mineral?The most common minerals on earthMineral PhotographyThe Elements and their MineralsGeological TimeMineral Evolution
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch 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 MuseumsMineral Shows & EventsThe Mindat DirectoryDevice 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)
Colour:
Colorless
Lustre:
Vitreous
Hardness:
5
Specific Gravity:
4.43 (Calculated)
Crystal System:
Monoclinic
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.


Hide all sections | Show all sections

Classification of RongibbsiteHide

Approved
Approval Year:
2010

Physical Properties of RongibbsiteHide

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

Optical Data of RongibbsiteHide

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 RongibbsiteHide

Formula:
Pb2(Si4Al)O11(OH)
IMA Formula:
Pb2(AlSi4)O11(OH)

Crystallography of RongibbsiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
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 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 DiffractionHide

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)

Type Occurrence of RongibbsiteHide

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:

Synonyms of RongibbsiteHide

Other Language Names for RongibbsiteHide

Other InformationHide

Notes:
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 RongibbsiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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 RongibbsiteHide

Localities for RongibbsiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
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 1993-2018, 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: January 17, 2018 20:32:02 Page generated: November 18, 2017 18:26:01
Go to top of page