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Mattheddleite

Big Photo

Whytes Cleuch, Wanlockhead, Leadhills-Wanlockhead District, Dumfries & Galloway (Dumfries-shire) and Strathclyde (Lanarkshire), Scotland, UK
© Steve Rust

Show Mattheddleite Photos (24)
Formula:
Pb
 
5
(Si
 
1.2
S
 
1.8
)O
 
12
(Cl
 
0.6
OH
 
0.4
)
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-Wanlockhead District, Dumfries & Galloway (Dumfries-shire) and Strathclyde (Lanarkshire), Scotland, UK
Place of Conservation of Type Material:Royal Museum of Scotland, Edinburgh, Scotland and at the British Museum (NH), London, England

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

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
 
1.2
S
 
1.8
)O
 
12
(Cl
 
0.6
OH
 
0.4
)
Essential elements:Cl, O, Pb, S, Si
All elements listed in formula:Cl, H, O, Pb, S, Si

Relationship of Mattheddleite to other Species

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
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
SO
 
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,Ca,K)
 
9
[{(OH)
 
2
,SO
 
4
,CO
 
3
,Cl
 
2
}
 
3
|Al
 
6
Si
 
6
O
 
24
] · 0.5H
 
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
3+
6
(W
6+
 
,Mg)
 
0.7
[(O,OH)
 
3
|SiO
 
4
]

Other Names for Mattheddleite

Synonyms:
IMA1985-019
German names:
Mattheddleit
Spanish names:
Mattheddleita

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 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


Internet Links for Mattheddleite

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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.
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    (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]
    Green, D. I. (1989): Scotlandite from Higher Roughton Gill, Caldbeck Fells, Cumbria. Mineralogical Magazine 53, 653.
    [UKJMM 16:15]
    [UKJMM 16:15]
    • Scotland
      • Dumfries & Galloway (Dumfries-shire) and Strathclyde (Lanarkshire)
    		A. Livingstone et al.: Scottish J. Geol. 23:1-8 (1987)
          • Leadhills
    		S Rust collection
    S.Rust Collection
            • Wanlock Dod
    		S.Rust collection
    S.Rust Collection
          • Wanlockhead
            • Wanlock Dod-Whytes Cleuch
    		S Rust Collection
    M.Wirth 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
    USA
     
    • Arizona
      • Pinal Co.
        • Mammoth District
          • Tiger
            • St. Anthony deposit
    		Microprobe analyzed by Paul Hlava; ID Paul Hlava, New Mexico
    Mineral and/or Locality
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