Footemineite
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About Footemineite
One more view of the quarry in May, 1968
Foote Lithium Co. Mine, Kings Mountain Mining District, Cleveland Co., North Carolina, USA
Foote Lithium Co. Mine, Kings Mountain Mining District, Cleveland Co., North Carolina, USA
Formula:
Ca2Mn2+Mn2+2Mn2+2Be4(PO4)6(OH)4 · 6H2O
Colour:
Yellow
Lustre:
Vitreous, Pearly
Hardness:
4½ - 5
Specific Gravity:
2.873 (Calculated)
Crystal System:
Triclinic
Member of:
Name:
Named for the type locality, Foote Mine, North Carolina, USA.
Type Locality:
Dimorph of:
Isostructural with:
Classification of Footemineite
Approved
Approval year:
2006
7/D.01-70
8.DA.10
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
A : With small (and occasionally larger) cations
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
A : With small (and occasionally larger) cations
Pronounciation of Footemineite
Pronounciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon & Katya Ralph | United Kingdom |
Physical Properties of Footemineite
Vitreous, Pearly
Transparency:
Transparent
Colour:
Yellow
Streak:
White
Hardness:
4½ - 5 on Mohs scale
Comment:
By analogy with other roscherite-group minerals.
Tenacity:
Brittle
Cleavage:
Distinct/Good
Good on {011} and {100}
Good on {011} and {100}
Density:
2.873 g/cm3 (Calculated)
Optical Data of Footemineite
Type:
Biaxial (-)
RI values:
nα = 1.620(2) nβ = 1.627(2) nγ = 1.634(2)
2V:
Measured: 080° , Calculated: 089.6°
Max Birefringence:
δ = 0.014
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:
Moderate
Dispersion:
weak r > v or r < v
Pleochroism:
Visible
Comments:
β (brownish yellow) > α = γ (yellow).
Chemical Properties of Footemineite
Formula:
Ca2Mn2+Mn2+2Mn2+2Be4(PO4)6(OH)4 · 6H2O
IMA Formula:
Ca2Mn2+5Be4(PO4)6(OH)4 · 6H2O
Crystallography of Footemineite
Crystal System:
Triclinic
Class (H-M):
1 - Pedial
Space Group:
P1
Cell Parameters:
a = 6.742 Å, b = 9.883 Å, c = 9.981 Å
α = 74.12°, β = 86.1°, γ = 87.36°
α = 74.12°, β = 86.1°, γ = 87.36°
Ratio:
a:b:c = 0.682 : 1 : 1.01
Unit Cell V:
637.92 ų (Calculated from Unit Cell)
Morphology:
Prismatic to bladed generally rough to barrel-shaped crystals
Twinning:
Twinning is simple, by reflection, with twin boundaries across the length of the crystals.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 9.393 Å | (53) |
| 5.922 Å | (100) |
| 4.799 Å | (26) |
| 3.173 Å | (44) |
| 2.983 Å | (14) |
| 2.787 Å | (35) |
| 2.413 Å | (14) |
Type Occurrence of Footemineite
General Appearance of Type Material:
Prismatic to bladed generally rough to barrel-shaped crystals up to about 1.5 mm long and 1 mm in diameter
Place of Conservation of Type Material:
Museu de Geociências, Instituto de Geociências, Universidade
de São Paulo, Rua do Lago, 562, 05508-080, São Paulo, SP, Brazil
de São Paulo, Rua do Lago, 562, 05508-080, São Paulo, SP, Brazil
Geological Setting of Type Material:
Quartz-microcline-spodumene pegmatite
Associated Minerals at Type Locality:
Synonyms of Footemineite
Relationship of Footemineite to other Species
Member of:
Other Members of this group:
| Atencioite | Ca2Fe2+3Mg2Be4(PO4)6(OH)4 · 6H2O | Tric. |
| Greifensteinite | Ca2Fe2+5Be4(PO4)6(OH)4 · 6H2O | Mon. |
| Guimarãesite | Ca2Be4Zn5(PO4)6(OH)4 · 6H2O | Mon. 2/m : B2/b |
| Okruschite | Ca2Mn2+5Be4(AsO4)6(OH)4 · 6H2O | Mon. 2/m : B2/b |
| Roscherite | Ca2Mn2+5Be4(PO4)6(OH)4 · 6H2O | Mon. 2/m : B2/m |
| Ruifrancoite | Ca2(◻,Mn)2(Fe3+,Mn,Mg)4Be4(PO4)6(OH)4(OH,H2O)2 · 4H2O | Mon. 2/m : B2/b |
| Zanazziite | Ca2Mg5Be4(PO4)6(OH)4 · 6H2O | Mon. 2/m : B2/b |
Related Minerals - Nickel-Strunz Grouping
| 8.DA.05 | Bearsite | Be2(AsO4)(OH) · 4H2O | Mon. |
| 8.DA.05 | Moraesite | Be2(PO4)(OH) · 4H2O | Mon. |
| 8.DA.10 | Roscherite | Ca2Mn2+5Be4(PO4)6(OH)4 · 6H2O | Mon. 2/m : B2/m |
| 8.DA.10 | Zanazziite | Ca2Mg5Be4(PO4)6(OH)4 · 6H2O | Mon. 2/m : B2/b |
| 8.DA.10 | Greifensteinite | Ca2Fe2+5Be4(PO4)6(OH)4 · 6H2O | Mon. |
| 8.DA.10 | Atencioite | Ca2Fe2+3Mg2Be4(PO4)6(OH)4 · 6H2O | Tric. |
| 8.DA.10 | Ruifrancoite | Ca2(◻,Mn)2(Fe3+,Mn,Mg)4Be4(PO4)6(OH)4(OH,H2O)2 · 4H2O | Mon. 2/m : B2/b |
| 8.DA.10 | Guimarãesite | Ca2Be4Zn5(PO4)6(OH)4 · 6H2O | Mon. 2/m : B2/b |
| 8.DA.15 | Uralolite | Ca2Be4(PO4)3(OH)3 · 5H2O | Mon. |
| 8.DA.20 | Weinebeneite | CaBe3(PO4)2(OH)2 · 4H2O | Mon. |
| 8.DA.25 | Tiptopite | K2(Na,Ca)2Li3Be6(PO4)6(OH)2 · H2O | Hex. |
| 8.DA.30 | Veszelyite | (Cu,Zn)2Zn(PO4)(OH)3 · 2H2O | Mon. 2/m : P21/b |
| 8.DA.35 | Kipushite | (Cu,Zn)5Zn(PO4)2(OH)6 · H2O | Mon. |
| 8.DA.35 | Philipsburgite | (Cu,Zn)6(AsO4,PO4)2(OH)6 · H2O | Mon. |
| 8.DA.40 | Spencerite | Zn4(PO4)2(OH)2 · 3H2O | Mon. 2/m : P2/b |
| 8.DA.45 | Glucine | CaBe4(PO4)2(OH)4 · 0.5H2O | |
| 8.DA.50 | Ianbruceite | [Zn2(OH)(H2O)(AsO4)](H2O)2 | Mon. 2/m : P21/b |
Fluorescence of Footemineite
None
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.
References for Footemineite
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Fanfani, L., Nunzi, A., Zananni, P.F., Zanzari, A.R. (1975) The crystal structure of roscherite. Tschermaks Mineralogische und Petrographische Mitteilungen: 22: 266-277. (as "triclinic roscherite")
Rastsvetaeva, R.K., Chukanov, N.V., Verin, I.A., Atencio, D. (2007) The crystal structure of footemineite. Transactions (Doklady) of the Russian Academy of Sciences/Earth Science Section: 416: 1053-1056.
Atencio, D., Matioli, P.A., Smith, J.B., Chukanov, N.V., Coutinho, J.M.V., Rastsvetaeva, R.K., Möckel, S. (2008) Footemineite, the Mn-analog of atencioite, from the Foote mine, Kings Mountain, Cleveland County, North Carolina, U.S.A., and its relationship with other roscherite-group minerals. American Mineralogist: 93: 1-6.
Poirier, G., Ercit, T.S., Tait, K.T., Piilonen, P.C., Rowe, R. (2009) New mineral names. American Mineralogist: 94: 399-408.
Internet Links for Footemineite
mindat.org URL:
https://www.mindat.org/min-30765.html
Please feel free to link to this page.
Please feel free to link to this page.
External Links:
Mineral Dealers:
Localities for Footemineite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for 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.
Brazil | |
| Leavens, P., White, J., and Nelen, J., 1990, Zanazzi from Minas Gerais, Brazil, Mineralogical Record 21, 413-417. |
USA (TL) | |
| Atencio, D., Matioli, P.A., Smith, J.B., Chukanov, N.V., Coutinho, J.M.V., Rastsvetaeva, R.K., Möckel, S. (2008): Footemineite, the Mn-analog of atencioite, from the Foote mine, Kings Mountain, Cleveland County, North Carolina, U.S.A., and its relationship with other roscherite-group minerals. American Mineralogist, 93, 1-6. |
Foote Lithium Co. Mine, Kings Mountain Mining District, Cleveland Co., North Carolina, USA