Mattheddleite
A valid IMA mineral species
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About Mattheddleite
Matthew Forster Heddle
Formula:
Pb5(SiO4)1.5(SO4)1.5(Cl,OH)
Colour:
Creamy white to pinkish
Lustre:
Adamantine
Hardness:
3½ - 4½
Specific Gravity:
6.96 (Calculated)
Crystal System:
Hexagonal
Member of:
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. First described from Leadhills, Strathclyde, Scotland, UK by Livingstone et al. (1987).
Type Locality:
A mineral in the Ellestadite Group of the Apatite Supergroup.
An OH-dominant analogue may exist, named as "hydroxylmattheddleite" by Pasero et al. (2010).
An OH-dominant analogue may exist, named as "hydroxylmattheddleite" by Pasero et al. (2010).
Unique Identifiers
Mindat ID:
2597
Long-form identifier:
mindat:1:1:2597:9
GUID
(UUID V4):
(UUID V4):
9d213b4d-e042-4746-aabd-9d9b1aa6fdc3
IMA Classification of Mattheddleite
Approved
IMA Formula:
Pb5(SiO4)1.5(SO4)1.5Cl
Approval year:
1985
First published:
1987
Classification of Mattheddleite
9.AH.25
9 : SILICATES (Germanates)
A : Nesosilicates
H : Nesosilicates with CO3, SO4, PO4, etc.
9 : SILICATES (Germanates)
A : Nesosilicates
H : Nesosilicates with CO3, SO4, PO4, etc.
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
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
17.10.23
17 : Silicates Containing other Anions
10 : Silicates with sulphate, molybdate or tungstate
17 : Silicates Containing other Anions
10 : Silicates with sulphate, molybdate or tungstate
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Mhd | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Mattheddleite
Adamantine
Transparency:
Transparent
Colour:
Creamy white to pinkish
Streak:
White
Hardness:
3½ - 4½ on Mohs scale
Cleavage:
Poor/Indistinct
on {0001}, or a parting
on {0001}, or a parting
Density:
6.96 g/cm3 (Calculated)
Optical Data of Mattheddleite
Type:
Uniaxial (-)
RI values:
nω = 2.017 nε = 1.999
Max Birefringence:
δ = 0.018
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Very High
Chemistry of Mattheddleite
Mindat Formula:
Pb5(SiO4)1.5(SO4)1.5(Cl,OH)
Crystallography of Mattheddleite
Crystal System:
Hexagonal
Class (H-M):
6/m - Dipyramidal
Space Group:
P63/m
Cell Parameters:
a = 10.0056 Å, c = 7.496 Å
Ratio:
a:c = 1 : 0.749
Unit Cell V:
649.9 ų
Z:
2
Morphology:
Tiny (10-100 µm) acicular hexagonal prisms forming radiating rosettes.
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
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Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0014546 | Mattheddleite | Steele I M, Pluth J J, Livingstone A (2000) Crystal structure of mattheddleite: a Pb, S, Si phase with the apatite structure Mineralogical Magazine 64 915-921 |  | 2000 | Leadhills, Scotland | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.32 Å | (40) |
| 4.13 Å | (40) |
| 3.41 Å | (20) |
| 3.26 Å | (30) |
| 2.988 Å | (100) |
| 2.877 Å | (40) |
| 2.072 Å | (20) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47b : [Sulfates and sulfites] | |
| 47g : [Halogen-bearing surface weathering minerals] | |
| Stage 10b: Anthropogenic minerals | <10 Ka |
| 56 : Slag and smelter minerals (see also #51 and #55) |
Geological Setting:
Oxidation zone in lead deposits.
Type Occurrence of Mattheddleite
General Appearance of Type Material:
Creamy-white linings of quartz cavities consisting of radiating hexagonal prisms, up to 100 um by 10-20 µm, forming aggregates about 0.2 mm in diameter.
Place of Conservation of Type Material:
Royal Museum of Scotland, Edinburgh, Scotland and at the British Museum (NH), London, England.
Associated Minerals at Type Locality:
Reference:
Livingstone, A., Ryback, G., Fejer, E.E., and Stanley, C.J. (1987) Mattheddleite, a new mineral of the apatite group from Leadhills, Strathclyde region. Scottish Journal of Geology: 23: 1-8.
Synonyms of Mattheddleite
Other Language Names for Mattheddleite
German:Mattheddleit
Spanish:Mattheddleita
Relationship of Mattheddleite to other Species
Member of:
Other Members of this group:
| Chlorellestadite | Ca5(SiO4)1.5(SO4)1.5Cl | Hex. 6/m : P63/m |
| Fluorellestadite | Ca5(SiO4)1.5(SO4)1.5F | Hex. 6/m : P63/m |
| Hydroxylellestadite | Ca5(SiO4)1.5(SO4)1.5(OH) | Hex. 6/mmm (6/m 2/m 2/m) : P63/mcm |
Common Associates
Associated Minerals Based on Photo Data:
| 38 photos of Mattheddleite associated with Caledonite | Pb5Cu2(SO4)3(CO3)(OH)6 |
| 18 photos of Mattheddleite associated with Susannite | Pb4(CO3)2(SO4)(OH)2 |
| 14 photos of Mattheddleite associated with Lanarkite | Pb2(SO4)O |
| 12 photos of Mattheddleite associated with Anglesite | PbSO4 |
| 9 photos of Mattheddleite associated with Leadhillite | Pb4(CO3)2(SO4)(OH)2 |
| 5 photos of Mattheddleite associated with Unnamed (Cu-Pb Silicate ?) | Pb, Cu, Si, O ? |
| 4 photos of Mattheddleite associated with Scotlandite | PbSO3 |
| 4 photos of Mattheddleite associated with Linarite | PbCu(SO4)(OH)2 |
| 3 photos of Mattheddleite associated with Pyromorphite | Pb5(PO4)3Cl |
| 3 photos of Mattheddleite associated with Elyite | Pb4Cu(SO4)O2(OH)4 · H2O |
Related Minerals - Strunz-mindat Grouping
| 9.AH. | Fluorbritholite-(Nd) | Ca2Nd3(SiO4)3F |
| 9.AH.05 | Iimoriite-(Y) | Y2[SiO4][CO3] |
| 9.AH.10 | Tundrite-(Ce) | Na2Ce2Ti(SiO4)(CO3)2O2 |
| 9.AH.10 | Tundrite-(Nd) | Na2(Nd,Ce)2Ti(SiO4)(CO3)2O2 |
| 9.AH.15 | Spurrite | Ca5(SiO4)2(CO3) |
| 9.AH.15 | Galuskinite | Ca7(SiO4)3(CO3) |
| 9.AH.20 | Ternesite | Ca5(SiO4)2(SO4) |
| 9.AH.20 | Silicocarnotite | Ca5[(SiO4)(PO4)](PO4) |
| 9.AH.25 | Britholite-(Ce) | (Ce,Ca)5(SiO4)3OH |
| 9.AH.25 | Britholite-(Y) | (Y,Ca)5(SiO4)3OH |
| 9.AH.25 | Chlorellestadite | Ca5(SiO4)1.5(SO4)1.5Cl |
| 9.AH.25 | Fluorbritholite-(Ce) | (Ce,Ca)5(SiO4)3F |
| 9.AH.25 | Fluorellestadite | Ca5(SiO4)1.5(SO4)1.5F |
| 9.AH.25 | Hydroxylellestadite | Ca5(SiO4)1.5(SO4)1.5(OH) |
| 9.AH.25 | Tritomite-(Ce) | Ce5(SiO4,BO4)3(OH,O) |
| 9.AH.25 | Tritomite-(Y) | Y5(SiO4,BO4)3(O,OH,F) |
| 9.AH.25 | Fluorcalciobritholite | (Ca,REE)5(SiO4,PO4)3F |
| 9.AH.25 | Fluorbritholite-(Y) | (Y,Ca)5(SiO4)3F |
| 9.AH.25 | Britholite-(La) | Ca2(La,Ce,Ca)3(SiO4,PO4)3(OH,F) |
| 9.AH.25 | Calciobritholite | (Ca,Y)5(SiO4,PO4)3(OH) |
| 9.AH.35 | Nabimusaite | KCa12(SiO4)4(SO4)2O2F |
| 9.AH.35 | Dargaite | BaCa12(SiO4)4(SO4)2O3 |
| 9.AH.40 | Zadovite | BaCa6[(SiO4)(PO4)](PO4)2F |
| 9.AH.40 | Gazeevite | BaCa6(SiO4)2(SO4)2O |
| 9.AH.40 | Stracherite | BaCa6(SiO4)2[(PO4)(CO3)]2F |
| 9.AH.45 | Flamite | Ca8-x(Na,K)x(SiO4)4-x(PO4)x |
| 9.AH.50 | Byzantievite | Ba5(Ca,REE,Y)22(Ti,Nb)18(SiO4)4[(PO4),(SiO4)]4(BO3)9O22[(OH),F]43(H2O)1.5 |
| 9.AH.55 | Greenwoodite | (Ba,V3+O)2V3+9(Fe3+,Fe2+)2Si2O22 |
| 9.AH.60 | Kihlmanite-(Ce) | Ce2TiO2(SiO4)(HCO3)2(H2O) |
| 9.AH.65 | Tsangpoite | Ca5(PO4)2(SiO4) |
| 9.AH.70 | Enalite | (Th,REE,Al) [(PO4),(SiO4),(OH)] |
Fluorescence of Mattheddleite
Dull yellow in SW
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Mattheddleite
mindat.org URL:
https://www.mindat.org/min-2597.html
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References for Mattheddleite
Reference List:
Steele, I. M., Pluth, J. J., Livingstone, A. (2000) Crystal structure of mattheddleite: a Pb, S, Si phase with the apatite structure. Mineralogical Magazine, 64 (5) 915-921 doi:10.1180/002646100549742
Localities for Mattheddleite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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).
All localities listed without proper references should be considered as questionable.
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Whytes Cleuch, Wanlockhead, Dumfries and Galloway, Scotland, UK