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 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 Shows & EventsThe Mindat DirectoryHow to Link to MindatDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Raygrantite

This page is currently not sponsored. Click here to sponsor this page.
Ray Grant
Formula:
Pb10Zn(SO4)6(SiO4)2(OH)2
System:
Triclinic
Colour:
colourless
Lustre:
Vitreous
Hardness:
3
Member of:
Isostructural with:
The S (or sulfate) analogue of hemihedrite, and S-Zn analogue of iranite.

The crystal structure consists of slabs || (120), which contain sulfate and silicate tetrahedra and ZnO4(OH)2 octahedra. Pb cations held those polyhedra together. There is a wide range of Pb–O bond distances.


Classification of Raygrantite

Approved, Pending publication

Physical Properties of Raygrantite

Vitreous
Diaphaneity (Transparency):
Transparent
Colour:
colourless
Streak:
white
Hardness (Mohs):
3
Comment:
ca. 3
Tenacity:
Brittle
Cleavage:
Distinct/Good
on {120}
Parting:
not observed
Density:
6.374 g/cm3 (Calculated)

Optical Data of Raygrantite

Type:
Biaxial (+)
RI values:
nα = 1.915(7) nβ = 1.981(7) nγ = 2.068(9)
2V:
Measured: 76° (2), Calculated: 85°
Max Birefringence:
δ = 0.153
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Very High

Chemical Properties of Raygrantite

Formula:
Pb10Zn(SO4)6(SiO4)2(OH)2
Elements listed in formula:
Analytical Data:
electron microprobe

Crystallography of Raygrantite

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 9.3175(4) Å, b = 11.1973(5) Å, c = 10.8318(5) Å
α = 120.374(2)°, β = 90.511(2)°, γ = 56.471(2)°
Ratio:
a:b:c = 0.832 : 1 : 0.967
Unit Cell Volume:
V 753.13 ų
Twinning:
fish-tail type, pervasive on (1 2 -1)
X-Ray Powder Diffraction Data:
d-spacingIntensity
4.753(56)
4.288(32)
3.267(63)
3.102(100)
2.996(29)
2.851(35)
2.783(31)
2.707(31)
Comments:
From Type Description.

Type Occurrence of Raygrantite

General Appearance of Type Material:
bladed crystals with striations || c
Place of Conservation of Type Material:
Type material is deposited in the collections of the University of Arizona Mineral Museum, Tucson, Arizona, USA, catalogue number 19345, and the RRUFF Project, deposition number R120151
Empirical Formula:
Pb9.81Zn0.93(S1.00O4)6(Si1.05O4)2(OH)2

Relationship of Raygrantite to other Species

Member of:
Other Members of Group:
HemihedritePb10Zn(CrO4)6(SiO4)2(OH)2
IranitePb10Cu(CrO4)6(SiO4)2(OH)2

Other Names for Raygrantite

Name in Other Languages:

Other Information

Other Information:
insoluble in water, acetone or HCl 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 Raygrantite

Reference List:
Yang, H., Andrade, M.B., Downs, R.T., Gibbs, R.B. and Jenkins. R.A. (2013) Raygrantite, IMA 2013-001. CNMNC Newsletter No. 16, August 2013, page 2700; Mineralogical Magazine, 77, 2695-2709.

Yang, H., Andrade, M.B., Downs, R.T., Gibbs, R.B., Jenkins, R.A. (2016): Raygrantite, Pb10Zn(SO4)6(SiO4)2(OH)2, a new mineral isostructural with iranite, from Big Horn Mountains, Maricopa County, Arizona, USA. Canadian Mineralogist: 54: 625-634; http://forum.amiminerals.it/viewtopic.php?f=5&t=13539 (2017)

Internet Links for Raygrantite

mindat.org URL:
https://www.mindat.org/min-43868.html
Please feel free to link to this page.

Localities for Raygrantite

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.
(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
        • Osborn District
          • Tonopah
            • Belmont Mountain
              • Tiger Wash
Yang, H., Andrade, M.B., Downs, R.T., Gibbs, R.B. and Jenkins. R.A. (2013) Raygrantite, IMA 2013-001. CNMNC Newsletter No. 16, August 2013, page 2700; Mineralogical Magazine, 77, 2695-2709.
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 1993-2017, 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, 2017 22:29:56 Page generated: May 17, 2017 22:32:14
Go to top of page