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Wooldridgeite

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Big Photo

Judkins Quarry, Nuneaton, Warwickshire, England, UK
© R. Bottrill




Formula:
Na
 
2
CaCu
2+
2
(P
 
2
O
 
7
)
 
2
 · 10H
 
2
O
System:OrthorhombicColour:Blue-green
Lustre:VitreousHardness:2 - 3
Name:Named after James Wooldridge (1923-1995), keen amateur mineralogist, micromounter and gemologist from Fernhill Heath, Worcestershire, U.K., who discovered the mineral.


A diphosphate (pyrophosphate), very unusual in nature. May not be natural.

Classification of Wooldridgeite

IMA status:Approved 1997
Strunz 8th edition ID:7/C.35-20
Nickel-Strunz 10th (pending) edition ID:8.FC.25

8 : PHOSPHATES, ARSENATES, VANADATES
F : Polyphosphates, Polyarsenates, [4]-Polyvanadates
C : Polyphosphates, etc., with H2O only
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Type Occurrence of Wooldridgeite

Type Locality:Judkins Quarry, Nuneaton, Warwickshire, England, UK

Physical Properties of Wooldridgeite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent
Colour:Blue-green
Streak:Very pale blue
Hardness (Mohs):2 - 3

Crystallography of Wooldridgeite

Crystal System:Orthorhombic

Optical Data of Wooldridgeite

Type:Biaxial (+)
RI values: nα = 1.508 nβ = 1.511 nγ = 1.517
2V:Measured: 76° , Calculated: 72°
Maximum Birefringence:δ = 0.009

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low
Dispersion:none

Chemical Properties of Wooldridgeite

Formula:
Na
 
2
CaCu
2+
2
(P
 
2
O
 
7
)
 
2
 · 10H
 
2
O
Essential elements:Ca, Cu, H, Na, O, P
All elements listed in formula:Ca, Cu, H, Na, O, P

Relationship of Wooldridgeite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.FC.05Fianelite
Mn
2+
2
((V,As)
 
2
O
 
7
) · 2H
 
2
O
8.FC.10Canaphite
Na
 
2
Ca(P
 
2
O
 
7
) · 4H
 
2
O
8.FC.15Pintadoite
Ca
 
2
(V
 
2
O
 
7
) · 9H
 
2
O
8.FC.20Arnhemite
(K,Na)
 
4
Mg
 
2
(P
 
2
O
 
7
)
 
2
 · 5H
 
2
O
8.FC.30Kanonerovite
Na
 
3
Mn
2+
 
(P
 
3
O
 
10
) · 12H
 
2
O

Other Names for Wooldridgeite

Synonyms:
IMA1997-037Woolridgeite
Other Languages:
German:Wooldridgeit
Woolridgeit
Russian:Вулдриджеит
Spanish:Wooldridgeita
Woolridgeita

Other Information

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 Wooldridgeite

Reference List:

- +
Canadian Mineralogist (1999): 37: 73-81.

Mineralogical Magazine: 63: 13-16.

Internet Links for Wooldridgeite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Wooldridgeite details from Handbook of Mineralogy (PDF)
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    • Localities for Wooldridgeite

    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.
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    UK
     
    • England
      • Warwickshire
        • Nuneaton
    		Mineralogical Magazine: 63: 13-16.
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