Chapmanite
A valid IMA mineral species - grandfathered
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About Chapmanite
John E. Chapman
Formula:
Fe3+2Sb3+(Si2O5)O3(OH)
"1:1" layer silicate where the Fe2(Si2O5)O3(OH) part of the formula is analogous in structure to kaolinite, Al2(Si2O5)(OH)4, but additional Sb3+ is in pyramidal coordinate over the "holes" in the Fe layer.
Colour:
Olive green to deep yellow
Hardness:
2½
Specific Gravity:
3.69 - 3.75
Crystal System:
Monoclinic
Name:
Named in honour of John Edward Chapman (22 February 1821, Kent, England - 28 January 1904, London, England), civil engineer and professor of mineralogy and geology, University of Toronto, Canada.
Type Locality:
Isostructural with:
The antimony analogue of Bismutoferrite with which it is easily confused.
Compare UM1978-09-O:CuHPbSbSi.
Compare UM1978-09-O:CuHPbSbSi.
Unique Identifiers
Mindat ID:
970
Long-form identifier:
mindat:1:1:970:6
GUID
(UUID V4):
(UUID V4):
7f206279-5196-4569-b057-aa0e2f84d680
IMA Classification of Chapmanite
Approved, 'Grandfathered' (first described prior to 1959)
First published:
1924
Classification of Chapmanite
9.ED.25
9 : SILICATES (Germanates)
E : Phyllosilicates
D : Phyllosilicates with kaolinite layers composed of tetrahedral and octahedral nets
9 : SILICATES (Germanates)
E : Phyllosilicates
D : Phyllosilicates with kaolinite layers composed of tetrahedral and octahedral nets
71.1.3.2
71 : PHYLLOSILICATES Sheets of Six-Membered Rings
1 : Sheets of 6-membered rings with 1:1 layers
71 : PHYLLOSILICATES Sheets of Six-Membered Rings
1 : Sheets of 6-membered rings with 1:1 layers
17.7.20
17 : Silicates Containing other Anions
7 : Silicates with vanadate, arsenate or antimonate
17 : Silicates Containing other Anions
7 : Silicates with vanadate, arsenate or antimonate
Mineral Symbols
As of 2021 there are now IMAâCNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Cpm | IMAâCNMNC | Warr, L.N. (2021). IMAâCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Chapmanite
Transparency:
Transparent
Comment:
Non metallic
Colour:
Olive green to deep yellow
Streak:
Greenish yellow to deep yellow
Hardness:
2½ on Mohs scale
Comment:
When compact
Fracture:
Irregular/Uneven, Conchoidal
Comment:
When compact
Density:
3.69 - 3.75 g/cm3 (Measured) 4.29 g/cm3 (Calculated)
Optical Data of Chapmanite
Type:
Biaxial (-)
RI values:
nα = 1.850 nβ = 1.950 nγ = 1.960
2V:
Calculated: 32°
Max Birefringence:
δ = 0.110
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
Dispersion:
none
Chemistry of Chapmanite
Mindat Formula:
Fe3+2Sb3+(Si2O5)O3(OH)
"1:1" layer silicate where the Fe2(Si2O5)O3(OH) part of the formula is analogous in structure to kaolinite, Al2(Si2O5)(OH)4, but additional Sb3+ is in pyramidal coordinate over the "holes" in the Fe layer.
"1:1" layer silicate where the Fe2(Si2O5)O3(OH) part of the formula is analogous in structure to kaolinite, Al2(Si2O5)(OH)4, but additional Sb3+ is in pyramidal coordinate over the "holes" in the Fe layer.
Common Impurities:
Al
Crystallography of Chapmanite
Crystal System:
Monoclinic
Class (H-M):
m - Domatic
Space Group:
Bm
Setting:
Cm
Cell Parameters:
a = 5.19 Å, b = 8.99 Å, c = 7.70 Å
β = 100.4°
β = 100.4°
Ratio:
a:b:c = 0.577 : 1 : 0.857
Unit Cell V:
353.37 Ă
Âł (Calculated from Unit Cell)
Z:
2
Morphology:
Crystals lath shaped, powdery, compact, massive.
Crystal Structure
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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) |
|---|---|---|---|---|---|---|---|
| 0015317 | Chapmanite | Ballirano P, Maras A, Marchetti F, Merlino S, Perchiazzi N (1998) Rietveld refinement of chapmanite SbFe2Si2O8OH, a TO dioctahderal kaolinite-like mineral Powder Diffraction 13 44-49 | 1998 | Tafone mine, Tucsany, Italy | 0 | 293 | |
| 0015577 | Chapmanite | Zhukhlistov A P, Zvyagin B B (1977) Determination of the crystal structures of chapmanite and bismuthoferrite by high-voltage electron diffraction Soviet Physics Crystallography 22 419-423 | 1977 | Smilokov, Czechoslovakia | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 7.63 Ă | (100) |
| 3.58 Ă | (100) |
| 3.88 Ă | (90) |
| 3.19 Ă | (90) |
| 2.90 Ă | (70) |
| 2.59 Ă | (70) |
| 2.54 Ă | (35) |
Comments:
Keeley mine, Ontario, Canada. Data from Milton et al. (1958).
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47) | |
| High-đ alteration and/or metamorphism | |
| 33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Type Occurrence of Chapmanite
General Appearance of Type Material:
Pulverulent; olive-green.
Place of Conservation of Type Material:
Harvard Mineralogical Museum, Cambridge, Massachusetts, USA, number 91501.
Royal Ontario Museum, Toronto, Ontario, Canada, numbers M35432 , M33773 and M14075.
Royal Ontario Museum, Toronto, Ontario, Canada, numbers M35432 , M33773 and M14075.
Geological Setting of Type Material:
Oxidation zone of a silver deposit.
Associated Minerals at Type Locality:
Reference:
Walker, T.L. (1924) Chapmanite, a new hydrous ferrous silica-antimonate from South Lorrain, Ontario. Contributions to Canadian Mineralogy, University of Toronto, Geology Series: 17: 5-8.
Synonyms of Chapmanite
Other Language Names for Chapmanite
Common Associates
Associated Minerals Based on Photo Data:
| 3 photos of Chapmanite associated with Goethite | α-Fe3+O(OH) |
| 2 photos of Chapmanite associated with Quartz | SiO2 |
| 2 photos of Chapmanite associated with Stibnite | Sb2S3 |
| 1 photo of Chapmanite associated with Marcasite | FeS2 |
| 1 photo of Chapmanite associated with Woodruffite | Zn2+x/2(Mn4+1-xMn3+x)O2 · yH2O |
| 1 photo of Chapmanite associated with Silver | Ag |
| 1 photo of Chapmanite associated with Siderite | FeCO3 |
| 1 photo of Chapmanite associated with Pharmacosiderite | KFe3+4(AsO4)3(OH)4 · 6-7H2O |
Related Minerals - Strunz-mindat Grouping
| 9.ED. | Clinochrysotile | |
| 9.ED.05 | Dickite | Al2(Si2O5)(OH)4 |
| 9.ED.05 | Kaolinite | Al2(Si2O5)(OH)4 |
| 9.ED.05 | Nacrite | Al2(Si2O5)(OH)4 |
| 9.ED.05 | Odinite | (Fe,Mg,Al,Fe,Ti,Mn)2.4((Si,Al)2O5)(OH)4 |
| 9.ED.10 | Halloysite | Al2(Si2O5)(OH)4 |
| 9.ED.10 | Hisingerite | Fe3+2(Si2O5)(OH)4 · 2H2O |
| 9.ED.10 | Hydrohalloysite | Al2Si2O5(OH)4 · 2H2O |
| 9.ED.15 | Amesite | Mg2Al(AlSiO5)(OH)4 |
| 9.ED.15 | Antigorite | Mg3(Si2O5)(OH)4 |
| 9.ED.15 | Berthierine | (Fe2+,Fe3+,Al)3(Si,Al)2O5(OH)4 |
| 9.ED.15 | Brindleyite | (Ni,Al)3(Si,Al)2O5(OH)4 |
| 9.ED.15 | Caryopilite | Mn2+3Si2O5(OH)4 |
| 9.ED.15 | Cronstedtite | Fe2+2Fe3+((Si,Fe3+)2O5)(OH)4 |
| 9.ED.15 | Fraipontite | (Zn,Al)3((Si,Al)2O5)(OH)4 |
| 9.ED.15 | Greenalite | (Fe2+,Fe3+)2-3Si2O5(OH)4 |
| 9.ED.15 | Kellyite | Mn2+2Al(AlSiO5)(OH)4 |
| 9.ED.15 | Lizardite | Mg3(Si2O5)(OH)4 |
| 9.ED.15 | Manandonite | Li2Al4(Si2AlB)O10(OH)8 |
| 9.ED.15 | NĂ©pouite | Ni3Si2O5(OH)4 |
| 9.ED.15 | Pecoraite | Ni3(Si2O5)(OH)4 |
| 9.ED.15 | Guidottiite | Mn2Fe3+(Fe3+SiO5)(OH)4 |
| 9.ED.15 va | Chromoamesite | Mg2(Al,Cr)(AlSiO5)(OH)4 |
| 9.ED.20 | Allophane | (Al2O3)(SiO2)1.3-2 · 2.5-3H2O |
| 9.ED.20 | Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| 9.ED.20 | Imogolite | Al2SiO3(OH)4 |
| 9.ED.20 | Neotocite | (Mn,Fe,Mg)SiO3 · H2O |
| 9.ED.25 | Bismutoferrite | Fe3+2Bi(SiO4)2(OH) |
| 9.ED.30 | Pianlinite | Al2Si2O6(OH)2 |
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 Chapmanite
mindat.org URL:
https://www.mindat.org/min-970.html
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References for Chapmanite
Reference List:
Majzlan, Juraj, Kiefer, Stefan, Lilova, Kristina, Subramani, Tamilarasan, Navrotsky, Alexandra, Dachs, Edgar, Benisek, Artur (2021) Chapmanite [Fe2Sb(Si2O5)O3(OH)]: thermodynamic properties and formation in low-temperature environments. European Journal of Mineralogy, 33 (4) 357-371 doi:10.5194/ejm-33-357-2021
Localities for Chapmanite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
â - 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.
Australia | |
| Gilligan et al. (1992) |
| Gilligan et al. (1992) |
Canada | |
| Cataloque of Canadian Minerals |
| WALKER (1924) +1 other reference |
| Ontario and Quebec. Canadian Geological ... +1 other reference | |
Czech Republic | |
| Duda +1 other reference |
| ĆœĂĄč +4 other references |
| [Lapis 1995 |
| PauliĆĄ et al. (2019) |
| VeselovskĂœ (2019) | |
| Roman GrambliÄka collection |
France | |
| |
| Michel Blondieau collection |
| PĂ©richaud et al. (1965) +1 other reference |
| FLUCK et al. (1992) |
| Pierres et Terre |
| Wittern et al. (Cologne) | |
| Pigetvieux (1981) |
Germany | |
| C.M. Kersten (1844) +1 other reference |
Italy | |
| |
| Orlandi et al. (2004) |
| Menchetti et al. (2015) |
Japan | |
| Ohe Rikosha specimens +1 other reference |
| Mineralogical Society of America - ... |
Kyrgyzstan | |
| Kolesar et al. (1993) |
| ... | |
Mexico | |
| Bideaux |
| Peter Megaw collector |
Portugal | |
| MUHNAC (AntĂłnio Bello mineral collection) |
Russia | |
| Kasatkin et al. (2021) |
Slovakia | |
| PolĂĄk S. et al. (in Slovak) +1 other reference |
| PolĂĄk S. | |
South Africa | |
| Sabine MC. Verryn & Paul MPB Meulenbe (e) |
Spain | |
| Mesa et al. (2002) |
| Calvo et al. (2014) |
USA | |
| Castor et al. (2004) |
| Castor et al. (2004) |
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Carlés Mine, Carlés, Salas, Asturias, Spain