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Mattheddleite

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Whytes Cleuch, Wanlockhead, Dumfries & Galloway (Dumfries-shire), Scotland, UK
© Steve Rust

Show Mattheddleite Photos (25)
Formula:
Pb
 
5
(Si
 
1.5
S
 
1.5
)O
 
12
(Cl,OH)
System:HexagonalColour:creamy white to pinkish
Hardness:3½ - 4½
Name:
Named after Matthew Forster Heddle (1828-1897), Scottish geologist and mineralogist who did significant work towards investigating and describing Scotland's mineralogy in the 19th century.
This page provides mineralogical data about Mattheddleite.

Classification of Mattheddleite

IMA status:Approved 1985
Strunz 8th edition ID:8/B.27-40
Nickel-Strunz 10th (pending) edition ID:9.AH.25

9 : SILICATES (Germanates)
A : Nesosilicates
H : Nesosilicates with CO3, SO4, PO4, etc.
Dana 8th edition ID:52.4.9.6

52 : NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
4 : Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
Hey's CIM Ref.:17.10.23

17 : Silicates Containing other Anions
10 : Silicates with sulphate, molybdate or tungstate
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Type Occurrence of Mattheddleite

Type Locality:Leadhills, South Lanarkshire, Strathclyde (Lanarkshire), Scotland, UK
Place of Conservation of Type Material:Royal Museum of Scotland, Edinburgh, Scotland and at the British Museum (NH), London, England

Occurrences of Mattheddleite

Geological Setting:Oxidation zone in lead deposits.

Physical Properties of Mattheddleite

Lustre:Adamantine
Diaphaneity (Transparency):Transparent
Colour:creamy white to pinkish
Streak:white
Hardness (Mohs):3½ - 4½
Cleavage:Poor/Indistinct
on {0001}, or a parting
Density (calculated):6.96 g/cm3

Crystallography of Mattheddleite

Crystal System:Hexagonal
Class (H-M):6/m - Dipyramidal
Space Group:P63/m
Cell Parameters:a = 10.0056Å, c = 7.496Å
Ratio:a:c = 1 : 0.749
Unit Cell Volume:V 649.9 ų
Z:2
Morphology:tiny (10-100mum) acicular hexagonal prisms forming radiating rosettes
X-Ray Powder Diffraction:
d-spacingIntensity
4.32 (40)
4.13 (40)
3.41 (20)
3.26 (30)
2.988 (100)
2.877 (40)
2.072 (20)
(

Optical Data of Mattheddleite

Type:Uniaxial (-)
RI values: nω = 2.017 nε = 1.999
Maximum Birefringence:δ = 0.018

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High

Chemical Properties of Mattheddleite

Formula:
Pb
 
5
(Si
 
1.5
S
 
1.5
)O
 
12
(Cl,OH)
Essential elements:Cl, O, Pb, S, Si
All elements listed in formula:Cl, H, O, Pb, S, Si

Relationship of Mattheddleite to other Species

Common Associates:
LanarkiteCerussiteAnglesitePyromorphiteHydrocerussite
CaledoniteLeadhilliteSusanniteMacphersonite
Related Minerals - Nickel-Strunz Grouping):

- +
9.AH.05Iimoriite-(Y)
Y
 
2
[CO
 
3
|SiO
 
4
]
9.AH.10Tundrite-(Ce)
Na
 
2
Ce
 
2
TiO
 
2
(SiO
 
4
)(CO
 
3
)
 
2
9.AH.10Tundrite-(Nd)
Na
 
3
(Nd,La)
 
4
(Ti,Nb)
 
2
(SiO
 
4
)
 
2
(CO
 
3
)
 
3
O
 
4
(OH)·2H
 
2
O
9.AH.15Paraspurrite
Ca
 
5
[CO
 
3
|(SiO
 
4
)
 
2
]
9.AH.15Spurrite
Ca
 
5
[CO
 
3
|(SiO
 
4
)
 
2
]
9.AH.20Ternesite
Ca
 
5
[SO
 
4
|(SiO
 
4
)
 
2
]
9.AH.25Britholite-(Ce)
Ca
 
2
(Ce,Ca)
 
3
[(OH,F)|(SiO
 
4
,PO
 
4
)
 
3
]
9.AH.25Britholite-(Y)
Ca
 
2
(Y,Ca)
 
3
[(OH,F)|(SiO
 
4
,PO
 
4
)
 
3
]
9.AH.25Ellestadite-(Cl)
Ca
 
10
[Cl
 
2
|(SO
 
4
)
 
3
|(SiO
 
4
)
 
3
]
9.AH.25Fluorbritholite-(Ce)
Ca
 
2
(Ce,Ca)
 
3
[(F,OH)|(SiO
 
4
,PO
 
4
)
 
3
]
9.AH.25Ellestadite-(F)
Ca
 
10
[(F,Cl,OH)
 
2
|(SO
 
4
)
 
3
|(SiO
 
4
)
 
3
]
9.AH.25Ellestadite-(OH)
Ca
 
10
[(OH,Cl,F)
 
2
|(SO
 
4
)
 
3
|(SiO
 
4
)
 
3
]
9.AH.25Tritomite-(Ce)
(Ce,La,Y,Th)
 
5
(Si,B)
 
3
(O,OH,F)
 
13
9.AH.25Tritomite-(Y)
(Y,Ca,La,Fe)
 
5
(Si,B,Al)
 
3
(O,OH,F)
 
13
9.AH.25Fluorcalciobritholite
(Ca,Ce)
 
5
 (SiO
 
4
,PO
 
4
)
 
3
F
9.AH.25IMA2009-005
Ca
 
2
(Y,Ca)
 
3
[(F,OH)|(SiO
 
4
,PO
 
4
)
 
3
]
Related Minerals - Hey's Index Grouping:

- +
17.10.1Nosean
Na
 
8
[SO
 
4
|Al
 
6
Si
 
6
O
 
24
]
17.10.2Pitiglianoite
Na
 
6
K
 
2
[SO
 
4
|Al
 
6
Si
 
6
O
 
24
] · 2H
 
2
O
17.10.3Vishnevite
(Na,K)
 
8
[(SO
 
4
,CO
 
3
)|Al
 
6
Si
 
6
O
 
24
] · 2H
 
2
O
17.10.4Haüyne
(Na,Ca)
 
4-8
[Al
 
6
Si
 
6
(O,S)
 
24
](SO
 
4
,Cl)
 
1-2
17.10.5Liottite
(Na,K)
 
16
Ca
 
8
[Cl
 
4
|(SO
 
4
)
 
5
|(Al
 
6
Si
 
6
O
 
24
)
 
3
]
17.10.6Latiumite
K
 
2
Ca
 
6
(Si,Al)
 
11
O
 
25
(SO
 
4
,CO
 
3
)
17.10.7Tuscanite
(K(Ca,Na)
 
6
(Si,Al)
 
10
O
 
22
[SO
 
4
,CO
 
3
,(OH)
 
2
]·H
 
2
O
17.10.8Microsommite
Na
 
4
K
 
2
Ca
 
2
[Cl
 
2
|SO
 
4
|Al
 
6
Si
 
6
O
 
24
]
17.10.9Delhayelite
(Na,K)
 
10
Ca
 
5
Al
 
6
Si
 
32
O
 
80
(Cl
 
2
,F
 
2
,SO
 
4
)
 
3
·18H
 
2
O
17.10.10Hydrodelhayelite
KCa
 
2
AlSi
 
7
O
 
17
(OH)
 
2
·6H
 
2
O
17.10.11Davyne
(Na,K)
 
6
Ca
 
2
[(Cl
 
2
,SO
 
4
)
 
2
|Al
 
6
Si
 
6
O
 
24
]
17.10.12Afghanite
(Na,Ca,K)
 
8
[(Cl
 
2
,SO
 
4
,CO
 
3
)
 
3
|Al
 
6
Si
 
6
O
 
24
] · 0.5H
 
2
O
17.10.13Franzinite
(Na,K)
 
6
Ca
 
2
[(SO
 
4
)
 
2
|Al
 
6
Si
 
6
O
 
24
] · 0.5H
 
2
O
17.10.14Giuseppettite
(Na,K,Ca)
 
7-8
[(SO
 
4
,Cl)
 
1-2
|Al
 
6
Si
 
6
O
 
24
]
17.10.15Sacrofanite
(Na,K)
 
98
Ca
 
20
(Si
 
84
Al
 
84
O
 
336
)(SO
 
4
)
 
26
Cl
 
2
·8H
 
2
O
17.10.16Chessexite
(Na,K)
 
4
Ca
 
2
(Mg,Zn)
 
3
Al
 
8
[(SO
 
4
)
 
10
|(SiO
 
4
)
 
2
] · 40H
 
2
O
17.10.17Innelite
Na
 
2
(Ba,K)
 
4
(Mg,Ca,Fe)Ti
 
3
Si
 
4
O
 
18
(OH,F)
 
1.5
SO
 
4
17.10.18Thaumasite
Ca
 
3
[CO
 
3
|SO
 
4
|Si(OH)
 
6
] · 12H
 
2
O
17.10.19Ellestadite
17.10.20Ellestadite-(Cl)
Ca
 
10
[Cl
 
2
|(SO
 
4
)
 
3
|(SiO
 
4
)
 
3
]
17.10.21Ellestadite-(OH)
Ca
 
10
[(OH,Cl,F)
 
2
|(SO
 
4
)
 
3
|(SiO
 
4
)
 
3
]
17.10.22Ellestadite-(F)
Ca
 
10
[(F,Cl,OH)
 
2
|(SO
 
4
)
 
3
|(SiO
 
4
)
 
3
]
17.10.24Queitite
Pb
 
4
Zn
 
2
[SO
 
4
|SiO
 
4
|Si
 
2
O
 
7
]
17.10.25Roeblingite
Pb
 
2
Ca
 
6
Mn
2+
 
[OH|SO
 
4
|Si
 
3
O
 
9
]
 
2
 · 4H
 
2
O
17.10.26Yoshimuraite
Ba
 
2
Mn
 
2
TiOSi
 
2
O
 
7
(PO
 
4
)(OH)
17.10.27Kegelite
Pb
 
12
(Zn,Fe)
 
2
Al
 
4
(SO
 
4
)
 
4
Si
 
11
O
 
38
 or near
17.10.28Wenkite
(Ba,K)
 
4
(Ca,Na)
 
6
[(SO
 
4
)
 
3
|(Si,Al)
 
20
O
 
39
(OH)
 
2
] · 0.5H
 
2
O
17.10.29Macquartite
Pb
 
3
Cu(CrO
 
4
)(SiO
 
3
)(OH)
 
4
·2H
 
2
O
17.10.30Welinite
Mn
2+
6
(W
6+
 
,Mg)
 
2
[(O,OH)
 
3
|SiO
 
4
]
 
2

Other Names for Mattheddleite

Synonyms:
IMA1985-019
Other Languages:
German:Mattheddleit
Spanish:Mattheddleita

Other Information

Fluorescence in UV light:Dull yellow in SW
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 Mattheddleite

Reference List:Livingstone, A., Ryback, G., Fejer, E. E., Stanley, C.J. (1987) "Mattheddleite, a new mineral of the apatite group from Leadhills, Strathclyde region", Scottish Journal of Geology: 23: 1-8.

American Mineralogist (1988): 73: 929 (abstract).

Steele, I.M., Pluth, J.J., A. Livingstone (2000): "Crystal structure of mattheddleite: a Pb, S, Si phase with the apatite structure" Mineralogical Magazine (2000): 64: 915-921.

Essene, E.J., C.E.Henderson & A. Livingstone (2006): "The missing sulphur in mattheddleite, sulphur analysis of sulphates, and paragenetic relations at Leadhills, Scotland", Mineralogical Magazine (2006): 70 : 265-280


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    Localities for Mattheddleite

    Hide Locality List
    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.
    Germany
     
    • Lower Saxony
      • Harz Mts
        • Clausthal-Zellerfeld
          • Oberschulenberg
    		Markus Gerstmann Collection
    UK
     
    • England
      • Cornwall
        • Mount's Bay District
          • St Hilary
    		[UKJMM 16:15]
      • Cumbria
        • North and Western Region (Cumberland)
          • Caldbeck Fells
            • Deer Hills
    		No reference listed
            • Roughton Gill
    		[UKJMM 16:15]
    Journal of The Russell Society, Volume 9, 2006
    Green, D. I. (1989): Scotlandite from Higher Roughton Gill, Caldbeck Fells, Cumbria. Mineralogical Magazine 53, 653. ; Journal of The Russell Society, Volume11, 2008
    [UKJMM 16:15]
    [UKJMM 16:15]
      • Derbyshire
        • Whitwell
    		vanadinite and descloizite, probably the best yet to be found in England and the secondary lead mineral suite including leadhillite, lanarkite, cerussite, anglesite, pyromorphite, scotlandite, mattheddleite and possibly susannite. Other minerals found were barite, calcite, hemimorphite, and sphalerite.
    • Scotland
      • Dumfries & Galloway (Dumfries-shire)
        • Wanlockhead
          • Wanlock Dod-Whytes Cleuch
    		S Rust Collection
    M.Wirth collection
    S Rust collection
    S.Rust Collection
      • Strathclyde (Lanarkshire)
        • South Lanarkshire
    		A. Livingstone et al.: Scottish J. Geol. 23:1-8 (1987)
    S Rust collection
    S.Rust Collection
            • Wanlock Dod
    		S.Rust collection
    S.Rust Collection
    • Wales
      • Caerphilly (Mid Glamorgan; Monmouthshire)
        • Machen
    		Minerals of Machen Quarry, Plant & Jones, Journal of the Russell Society, Vol 6, Pt 1, 1995
      • Ceredigion (Dyfed; Cardiganshire)
        • Ceulanymaesmawr
          • Talybont
    		S.Rust collection
            • Nant-y-Moch Reservoir area
    		S.Rust collection
    [UKJMM 16:15]
        • Trefeirig
          • Pen-bont Rhydybeddau
    		[UKJMM 16:15]
    S Rust Collection
        • Upper Llanfihangell-y-Creuddyn
          • Pontrhydygroes
    		BMS Database, UKJMM 17
        • Ysbyty Ystwyth
    		S Rust collection
    S.Rust collection
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the 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 hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 5th Nov 2009 16:54:22