Yeomanite
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
About Yeomanite
Formula:
Pb2O(OH)Cl
Colour:
White, Grey
Lustre:
Vitreous
Specific Gravity:
7.303 (Calculated)
Crystal System:
Orthorhombic
Name:
Named in joint recognition of Mrs Angela Yeoman (1931–) and her company, Foster Yeoman, who operated Merehead Quarry, the TL, for aggregate until 2006.
Type Locality:
Structurally related to sidpietersite, penfieldite and laurionite. At the TL yeomanite may be invariably intimately associated with mendipite and paralaurionite.
Unique Identifiers
Mindat ID:
43887
Long-form identifier:
mindat:1:1:43887:4
GUID
(UUID V4):
(UUID V4):
5dc4bbb6-9e7f-459e-bca7-d3597c144c63
IMA Classification of Yeomanite
Approved
Approval year:
2013
Classification of Yeomanite
3.DC.57
3 : HALIDES
D : Oxyhalides, hydroxyhalides and related double halides
C : With Pb (As,Sb,Bi), without Cu
3 : HALIDES
D : Oxyhalides, hydroxyhalides and related double halides
C : With Pb (As,Sb,Bi), without Cu
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 |
|---|---|---|
| Yeo | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pronunciation of Yeomanite
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon Ralph | United Kingdom |
Physical Properties of Yeomanite
Vitreous
Transparency:
Transparent
Colour:
White, Grey
Comment:
Normally white, occasionally grey
Streak:
White
Cleavage:
Perfect
parallel to the long axis of the fibres but this is masked by the fibrous nature, especially as individual fibres break easily.
parallel to the long axis of the fibres but this is masked by the fibrous nature, especially as individual fibres break easily.
Density:
7.303 g/cm3 (Calculated)
Chemistry of Yeomanite
Mindat Formula:
Pb2O(OH)Cl
Elements listed:
Crystallography of Yeomanite
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pnma
Setting:
Pnma
Cell Parameters:
a = 6.585(10) Å, b = 3.855(6) Å, c = 17.26(1) Å
Ratio:
a:b:c = 1.708 : 1 : 4.477
Unit Cell V:
438 ų
Z:
4
Morphology:
As small, twisted, rope-like fibres forming loose mats and strands resembling asbestos. Individual fibres are generally <8 mm long, but exceptionally may reach up to 15 mm.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.770 Å | (32) |
| 3.293 Å | (61) |
| 3.054 Å | (17) |
| 2.880 Å | (100) |
| 2.802 Å | (78) |
| 2.166 Å | (22) |
| 2.050 Å | (18) |
| 1.662 Å | (19) |
Comments:
From Type Description.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47g : [Halogen-bearing surface weathering minerals] | |
| 47h : [Near-surface oxidized, dehydrated minerals] |
Type Occurrence of Yeomanite
General Appearance of Type Material:
Appears to be formed of small, twisted, rope-like fibres growing from the end of columnar mendipite masses.
Place of Conservation of Type Material:
Type material is deposited in the collections of the collections of the Natural History Museum, London, UK, catalogue number BM 2013,5
Geological Setting of Type Material:
In manganese pods
Associated Minerals at Type Locality:
Synonyms of Yeomanite
Common Associates
Related Minerals - Strunz-mindat Grouping
| 3.DC. | Lucabindiite | (K,NH4)As4O6(Cl,Br) |
| 3.DC. | Torrecillasite | Na(As,Sb)3+4O6Cl |
| 3.DC. | Gajardoite | KCa0.5As3+4O6Cl2 · 5H2O |
| 3.DC. | Cuatrocapaite-(NH₄) | (NH4)3(NaMg◻)(As2O3)6Cl6 · 16H2O |
| 3.DC. | Cuatrocapaite-(K) | K3(NaMg◻)(As2O3)6Cl6 · 16H2O |
| 3.DC. | Napoliite | Pb2OFCl |
| 3.DC.05 | Laurionite | PbCl(OH) |
| 3.DC.05 | Paralaurionite | PbCl(OH) |
| 3.DC.05 | Russoite | (NH4)ClAs2O3(H2O)0.5 |
| 3.DC.05 | Mauriziodiniite | (NH4)(As2O3)2I |
| 3.DC.10 | Fiedlerite | Pb3FCl4(OH) · H2O |
| 3.DC.15 | Penfieldite | Pb2Cl3(OH) |
| 3.DC.15 | Telluroperite | Pb3TeO4Cl2 |
| 3.DC.20 | Laurelite | Pb7F12Cl2 |
| 3.DC.25 | Bismoclite | BiOCl |
| 3.DC.25 | Matlockite | PbFCl |
| 3.DC.25 | Rorisite | CaFCl |
| 3.DC.25 | Zavaritskite | (BiO)F |
| 3.DC.25 | Zhangpeishanite | BaFCl |
| 3.DC.30 | Nadorite | PbSbClO2 |
| 3.DC.30 | Perite | PbBiClO2 |
| 3.DC.40 | Thorikosite | Pb3Cl2(OH)(SbO3,AsO3) |
| 3.DC.45 | Mereheadite | Pb47Cl25(OH)13O24(CO3)(BO3)2 |
| 3.DC.50 | Blixite | Pb8O5(OH)2Cl4 |
| 3.DC.52 | Rumseyite | Pb2OClF |
| 3.DC.55 | Pinalite | Pb3WO5Cl2 |
| 3.DC.55 | Vladkrivovichevite | [Pb32O18][Pb4Mn2O]Cl14(BO3)8 · 2H2O |
| 3.DC.60 | Lorettoite | Pb7O6Cl2 |
| 3.DC.60 | Symesite | Pb10(SO4)O7Cl4 · H2O |
| 3.DC.62 | Sarawakite (of Frenzel) | Sb, O, Cl (?) |
| 3.DC.65 | Ecdemite | Pb6Cl4(As2O7) |
| 3.DC.70 | Mendipite | Pb3Cl2O2 |
| 3.DC.75 | Damaraite | Pb3Cl(OH)O2 |
| 3.DC.80 | Onoratoite | Sb8Cl2O11 |
| 3.DC.95 | Barstowite | Pb4Cl6(CO3) · H2O |
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 Yeomanite
mindat.org URL:
https://www.mindat.org/min-43887.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Yeomanite
Reference List:
Turner, R. W., Siidra, O. I., Rumsey, M. S., Polekhovsky, Y. S., Kretser, Y. L., Krivovichev, S. V., Spratt, J., Stanley, C. J. (2015) Yeomanite, Pb2O(OH)Cl, a new chain-structured Pb oxychloride from Merehead Quarry, Somerset, England. Mineralogical Magazine, 79 (5) 1203-1211 doi:10.1180/minmag.2015.079.5.14
Localities for Yeomanite
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.
Quick NavTopAbout YeomaniteUnique IdentifiersIMA Classification Classification Mineral SymbolsPronunciation Physical Properties Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Torr Works Quarry, Cranmore, Mendip, Somerset, England, UK