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Cu2Pb2Si5O14 · 4H2O
Translucent nickel green
Specific Gravity:
Crystal System:
For Raymond W. Ludden the chief geologist for Western Exploration, Phelps Dodge Corp.
This page provides mineralogical data about Luddenite.

Hide all sections | Show all sections

Classification of LuddeniteHide


9 : SILICATES (Germanates)
H : Unclassified silicates
H : With Pb

78 : Unclassified Silicates
7 :

14 : Silicates not Containing Aluminum
13 : Silicates of Pb

Physical Properties of LuddeniteHide

Translucent nickel green
Pale nickel green
4.45 g/cm3 (Measured)    

Optical Data of LuddeniteHide

RI values:
nα = 1.852 nγ = 1.867
Measured: 40°
Max Birefringence:
δ = 0.015
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
gamma=rich emerald green, alpha = beta = yellow green.

Chemical Properties of LuddeniteHide

Cu2Pb2Si5O14 · 4H2O
IMA Formula:
Cu2Pb2Si5O14 · 14H2O
Common Impurities:

Crystallography of LuddeniteHide

Crystal System:
Cell Parameters:
a = 7.85 Å, b = 20.06 Å, c = 14.72 Å
β = 90.78°
a:b:c = 0.391 : 1 : 0.734
Unit Cell V:
2,317.76 ų (Calculated from Unit Cell)
Grains not exceeding 0.01 mm in size. They form in rosettes or fan-shaped aggregates closely packed together. Where individual grains can be discerned, they are scales or plates with wedge-shaped terminations.

Type Occurrence of LuddeniteHide

Synonyms of LuddeniteHide

Other Language Names for LuddeniteHide


Common AssociatesHide

Associated Minerals Based on Photo Data:
Wickenburgite1 photo of Luddenite associated with Wickenburgite on
Linarite1 photo of Luddenite associated with Linarite on
Galena1 photo of Luddenite associated with Galena on

Related Minerals - Nickel-Strunz GroupingHide

9.HH.15CreaseyitePb2Cu2Fe3+2(Si4.67Al0.33)O15.33(OH)3 · H2OOrth. mmm (2/m 2/m 2/m) : Cmcm
9.HH.20PlumbotsumitePb13(CO3)6(Si10O27) · 3H2OOrth.
9.HH.25MolybdophyllitePb8Mg9[Si10O28(OH)8|O2|(CO3)3] · H2O Mon. 2 : B2

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.13.2PlumbotsumitePb13(CO3)6(Si10O27) · 3H2OOrth.
14.13.4MolybdophyllitePb8Mg9[Si10O28(OH)8|O2|(CO3)3] · H2O Mon. 2 : B2
14.13.5MargarosanitePb(Ca,Mn2+)2(Si3O9)Tric. 1 : P1
14.13.7KentrolitePb2Mn3+2(Si2O7)O2Orth. mmm (2/m 2/m 2/m) : Pbcm
14.13.10CreaseyitePb2Cu2Fe3+2(Si4.67Al0.33)O15.33(OH)3 · H2OOrth. mmm (2/m 2/m 2/m) : Cmcm

Other InformationHide

Luddenite is not easily soluble in acids. Dissolution even in heated 50 % HNO3 was slow. It readily fuses to a runny lemon yellow slag in the closed tube.
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 LuddeniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Williams, S. A. (1982). Luddenite, a new copper-lead silicate from Arizona. Mineralogical Magazine, 46(340), 363-364.
American Mineralogist (1983): 68: 643.
Frost, R. L., López, A., Xi, Y., & Scholz, R. (2015). A vibrational spectroscopic study of the copper bearing silicate mineral luddenite. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 137, 717-720.

Internet Links for LuddeniteHide

Localities for LuddeniteHide

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.
  • Salzburg
    • Hohe Tauern
      • Habach valley
        • Nasenkopf
Brandstätter, F., Hirche, T., Niedermayr, G. & Walter, F. (2010): 1638) Azurit, Brochantit, Devillin, Linarit, Luddenit (?), Malachit, Mottramit und Wulfenit sowie andere Mineralien aus der Greinerrinne im Habachtal, Salzburg. Pp. 225-227 in Niedermayr et al. (2010): Neue Mineralfunde aus Österreich LIX. Carinthia II, 200./120., 199-260.
  • Bavaria
    • Upper Palatinate
      • Freihung,16866.15.html
  • Arizona
    • Maricopa Co.
      • Big Horn Mts
        • Osborn District
          • Tonopah
            • Belmont Mountain
              • Tiger Wash
    • Mohave Co.
      • Artillery Mts
        • Artillery Peak
S. A. Williams (1982) Luddenite, a New Copper-Lead Silicate from Arizona Mineralogical Magazine 1982 46 : 363-364
        • Rawhide Wash
          • Rawhide Mine area
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 104, 369; Williams, S.A. (1982), Luddenite, a new copper-lead silicate mineral from AZ, Mineralogical Magazine: 46:363-364.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 280.
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