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Plumbophyllite

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Formula:
Pb
 
2
Si
 
4
O
 
10
· H
 
2
O
System:OrthorhombicColour:pale blue to very light ...
Hardness:5
Name:The mineral is named for its essential Pb content and its silicate sheet structure (Greek φύλλον = leaf).


Structurally related to pentagonite.

Classification of Plumbophyllite

IMA status:Approved 2008
Nickel-Strunz 10th (pending) edition ID:9.EA.85

9 : SILICATES (Germanates)
E : Phyllosilicates
A : Single nets of tetrahedra with 4-, 5-, (6-), and 8-membered rings
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Type Occurrence of Plumbophyllite

Type Locality:Blue Bell Mine (Blue Bell claims; Hard Luck Mine; Hard Luck claims; Atkinson), Baker, Soda Lake Mts, San Bernardino Co., California, USA
Place of Conservation of Type Material:Natural History Museum of Los Angeles County, catalog numbers 58829, 58830, 58831, and 58832 (cotypes)
Year of Discovery:2000
Geological Setting of type material:Oxidation zone
Associated Minerals at type locality:
WulfeniteSepioliteQuartzPlumbotsumiteOpal
MimetiteGypsumGoethiteFluoriteChrysocolla
Cerussite

Physical Properties of Plumbophyllite

Lustre:Vitreous
Diaphaneity (Transparency):Translucent
Colour:pale blue to very light blue-green
Streak:white
Hardness (Mohs):5
Tenacity:Brittle
Cleavage:Perfect
{100}
Fracture:Splintery
Density (measured):3.96(5) g/cm3
Density (calculated):3.940 g/cm3

Crystallography of Plumbophyllite

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:Pbcn
Cell Parameters:a = 13.2083Å, b = 9.7832Å, c = 8.6545Å
Ratio:a:b:c = 1.35 : 1 : 0.885
Unit Cell Volume:V 1,118.33 ų (Calculated from Unit Cell)
Morphology:Plumbophyllite forms prismatic crystals, elongate on c, with wedge-shaped terminations
X-Ray Powder Diffraction:
d-spacingIntensity
7.883 (97)
6.625 (35)
4.897 (38)
3.623 (100)
3.166 (45)
2.938 (57)
2.555 (51)
2.243 (50)

Optical Data of Plumbophyllite

Type:Biaxial (+)
RI values: nα = 1.674(2) nβ = 1.684(2) nγ = 1.708(2)
2V:Measured: 66° , Calculated: 66.5°
Maximum Birefringence:δ = 0.034

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Dispersion:Strong r > v dispersion
Pleochroism:Non-pleochroic

Chemical Properties of Plumbophyllite

Formula:
Pb
 
2
Si
 
4
O
 
10
· H
 
2
O
Simplified for copy/paste:Pb2Si4O10·H2O
Essential elements:H, O, Pb, Si
All elements listed in formula:H, O, Pb, Si

Relationship of Plumbophyllite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.EA.05Cuprorivaite
CaCu[Si
 
4
O
 
10
]
9.EA.05Gillespite
BaFe
2+
 
[Si
 
4
O
 
10
]
9.EA.05Effenbergerite
BaCu[Si
 
4
O
 
10
]
9.EA.05Wesselsite
SrCu[Si
 
4
O
 
10
]
9.EA.10Ekanite
(Ca,Fe
2+
 
,Pb)
 
2
(Th,U)[Si
 
8
O
 
20
]
9.EA.15Fluorapophyllite-(K)
KCa
 
4
(Si
 
8
O
 
20
)(F,OH) · 8H
 
2
O
9.EA.15Hydroxyapophyllite-(K)
KCa
 
4
(Si
 
8
O
 
20
)(OH,F) · 8H
 
2
O
9.EA.15Fluorapophyllite-(Na)
NaCa
 
4
(Si
 
8
O
 
20
)F · 8H
 
2
O
9.EA.20Magadiite
Na
 
2
Si
 
14
O
 
29
· 11H
 
2
O
9.EA.25Dalyite
K
 
2
ZrSi
 
6
O
 
15
9.EA.25Davanite
K
 
2
TiSi
 
6
O
 
15
9.EA.30Sazhinite-(Ce)
Na
 
3
Ce[Si
 
6
O
 
15
] · 6H
 
2
O
9.EA.30Sazhinite-(La)
Na
 
3
La[Si
 
6
O
 
15
] · 2H
 
2
O
9.EA.35Armstrongite
CaZr[Si
 
6
O
 
15
] · 3H
 
2
O
9.EA.40Okenite
CaSi
 
2
O
 
5
· 2H
 
2
O
9.EA.45Nekoite
Ca
 
3
Si
 
6
O
 
15
·7H
 
2
O
9.EA.50Cavansite
Ca(VO)Si
 
4
O
 
10
· 4H
 
2
O
9.EA.55Pentagonite
Ca(VO)Si
 
4
O
 
10
· 4H
 
2
O
9.EA.60Penkvilksite
Na
 
4
Ti
 
2
Si
 
8
O
 
22
· 4H
 
2
O
9.EA.60Tumchaite
Na
 
2
Zr(Si
 
4
O
 
11
) · 2H
 
2
O
9.EA.65Nabesite
Na
 
2
BeSi
 
4
O
 
10
· 4H
 
2
O
9.EA.70Ajoite
(K,Na)Cu
 
7
AlSi
 
9
O
 
24
(OH)
 
6
· 3H
 
2
O
9.EA.75Zeravshanite
Na
 
2
Cs
 
4
Zr
 
3
[Si
 
18
O
 
45
]*2H
 
2
O
9.EA.80Bussyite-(Ce)
(Ce,REE)
 
3
(Na,H
 
2
O)
 
6
MnSi
 
9
Be
 
5
(O,OH)
 
30
F
 
4

Other Names for Plumbophyllite

Synonyms:
IMA2008-025
Other Languages:

Other Information

Fluorescence in UV light:None
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Plumbophyllite

Reference List:

- +
Anthony R. Kampf, George R. Rossman, and Robert M. Housley (2009) Plumbophyllite, a new species from the Blue Bell claims near Baker, San Bernardino County, California. American Mineralogist, 94, 1198–1204.

http://minerals.gps.caltech.edu/Manuscripts/2009/Plumbophyllite/Index.html

Internet Links for Plumbophyllite

Search Engines:
  • Look for Plumbophyllite on Google
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  • External Links:
  • Look for Plumbophyllite on Webmineral
  • Look for Plumbophyllite on Athena Mineralogy
  • Look for Plumbophyllite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Mineral Dealers:
  • The Arkenstone - Fine Minerals
  • Wilensky Fine Minerals
  • Top quality minerals from Kristalle of California
  • Fabre Minerals - search for Plumbophyllite specimens
  • Find Plumbophyllite on www.crystalclassics.co.uk
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  • Localities for Plumbophyllite

    The 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. ? 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.
    Australia
     
    • Queensland
      • Mount Isa - Cloncurry area
        • Mount Isa district
          • Mount Isa Mines
    R Bottrill (unpub data)
    USA
     
    • California
      • San Bernardino Co.
        • Soda Lake Mts
          • Baker
    American Mineralogist, Volume 94, pages 1198–1204, 2009
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    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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