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Petewilliamsite

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About PetewilliamsiteHide

Pete Williams
Formula:
(Ni,Co)30(As2O7)15
Colour:
dark violet-red to dark brownish red
Lustre:
Vitreous
Specific Gravity:
4.904
Crystal System:
Monoclinic
Name:
Honouring Prof. Peter A. Williams of the University of Western Sydney, Australia, for his contributions to the study of secondary minerals
This page provides mineralogical data about Petewilliamsite.


Classification of PetewilliamsiteHide

Approved
Approval Year:
2002
8.FA.25

8 : PHOSPHATES, ARSENATES, VANADATES
F : Polyphosphates, Polyarsenates, [4]-Polyvanadates
A : Polyphosphates, etc., without OH and H2O; dimers of corner-sharing RO4 tetrahedra.
Dana 7th ed.:
39.1.10.1

Pronounciation of PetewilliamsiteHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of PetewilliamsiteHide

Vitreous
Transparency:
Translucent
Colour:
dark violet-red to dark brownish red
Density:
4.904 g/cm3 (Measured)    

Chemical Properties of PetewilliamsiteHide

Formula:
(Ni,Co)30(As2O7)15
Common Impurities:
Ca,Cu,Fe

Crystallography of PetewilliamsiteHide

Crystal System:
Monoclinic
Class (H-M):
2 - Sphenoidal
Space Group:
B2
Cell Parameters:
a = 33.256 Å, b = 8.482 Å, c = 14.191 Å
β = 104.145°
Ratio:
a:b:c = 3.921 : 1 : 1.673
Unit Cell V:
3881.6 ų
Z:
2

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.235 (30)
3.118 (100)
3.005 (60)
2.567 (50)
1.637 (50)
1.507 (30)

Type Occurrence of PetewilliamsiteHide

General Appearance of Type Material:
scattered patches of mm-sized aggregates, consisting of crystals with an average size of 20 µm to 0.3 mm
Geological Setting of Type Material:
in nickeline-veined quartz
Associated Minerals at Type Locality:

Synonyms of PetewilliamsiteHide

Other Language Names for PetewilliamsiteHide

Simplified Chinese:皮特威廉姆斯矿
Traditional Chinese:皮特威廉姆斯礦

Common AssociatesHide

Associated Minerals Based on Photo Data:
Xanthiosite2 photos of Petewilliamsite associated with Xanthiosite on mindat.org.
Aerugite1 photo of Petewilliamsite associated with Aerugite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.FA.05Blossiteα-Cu2(V2O7)Orth. mm2 : Fdd2
8.FA.10Ziesiteβ-Cu2(V2O7)Mon.
8.FA.15ChervetitePb2(V2O7)Mon.
8.FA.15UM1999-17:O:PbVPb4(VO4)2O
8.FA.20Pyrocoproite(K,Na)2Mg(P2O7)Mon.
8.FA.20PyrophosphiteK2Ca(P2O7)Mon.

Other InformationHide

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 PetewilliamsiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Roberts, A.C., P.C. Burns, R.A. Gault, A.J. Criddle, M.N. Feinglos (2004): Petewilliamsite, (Ni,Co)30(As2O7)15, a new mineral from Johanngeorgenstadt, Saxony, Germany: description and crystal structure. Mineralogical Magazine 68, 231-240.

Internet Links for PetewilliamsiteHide

Localities for PetewilliamsiteHide

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.
Germany (TL)
 
  • Saxony
    • Erzgebirge
      • Johanngeorgenstadt District
A.C. Roberts, P.C. Burns, R.A. Gault, A.J. Criddle, M. N. Feinglos: Mineralogical Magazine 68(2):231-240 (2004)
Mineral and/or Locality  
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