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About FootemineiteHide

Ca2Mn2+Mn2+2Mn2+2Be4(PO4)6(OH)4 · 6H2O
Vitreous, Pearly
4½ - 5
Specific Gravity:
02.873 (Calculated)
Crystal System:
Named for the type locality, Foote Mine, North Carolina, USA.
Dimorph of:
Isostructural with:

Classification of FootemineiteHide

Approval Year:

D : Phosphates, etc. with additional anions, with H2O
A : With small (and occasionally larger) cations

Pronounciation of FootemineiteHide

PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of FootemineiteHide

Vitreous, Pearly
4½ - 5 on Mohs scale
By analogy with other roscherite-group minerals.
Good on {011} and {100}
02.873 g/cm3 (Calculated)

Optical Data of FootemineiteHide

Biaxial (-)
RI values:
nα = 1.620(2) nβ = 1.627(2) nγ = 1.634(2)
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.
Surface Relief:
weak r > v or r < v
β (brownish yellow) > α = γ (yellow).

Chemical Properties of FootemineiteHide

Ca2Mn2+Mn2+2Mn2+2Be4(PO4)6(OH)4 · 6H2O
IMA Formula:
Ca2Mn2+5Be4(PO4)6(OH)4 · 6H2O

Crystallography of FootemineiteHide

Crystal System:
Class (H-M):
1 - Pedial
Space Group:
Cell Parameters:
a = 6.742 Å, b = 9.883 Å, c = 9.981 Å
α = 74.12°, β = 86.1°, γ = 87.36°
a:b:c = 0.682 : 1 : 1.01
Unit Cell V:
637.92 ų (Calculated from Unit Cell)
Prismatic to bladed generally rough to barrel-shaped crystals
Twinning is simple, by reflection, with twin boundaries across the length of the crystals.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
9.393 (53)
5.922 (100)
4.799 (26)
3.173 (44)
2.983 (14)
2.787 (35)
2.413 (14)

Type Occurrence of FootemineiteHide

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
Geological Setting of Type Material:
Quartz-microcline-spodumene pegmatite
Associated Minerals at Type Locality:

Synonyms of FootemineiteHide

Relationship of Footemineite to other SpeciesHide

Other Members of this group:
AtencioiteCa2Fe2+3Mg2Be4(PO4)6(OH)4 · 6H2O
GreifensteiniteCa2Fe2+5Be4(PO4)6(OH)4 · 6H2OMon.
GuimarãesiteCa2Be4Zn5(PO4)6(OH)4 · 6H2OMon. 2/m : B2/b
OkruschiteCa2Mn2+5Be4(AsO4)6(OH)4·6H2OMon. 2/m : B2/b
RoscheriteCa2Mn2+5Be4(PO4)6(OH)4 · 6H2OMon. 2/m : B2/m
RuifrancoiteCa2(◻,Mn)2(Fe3+,Mn,Mg)4Be4(PO4)6(OH)4(OH,H2O)2 · 4H2OMon. 2/m : B2/b
ZanazziiteCa2Mg5Be4(PO4)6(OH)4 · 6H2OMon. 2/m : B2/b

Related Minerals - Nickel-Strunz GroupingHide

8.DA.05BearsiteBe2(AsO4)(OH) · 4H2OMon.
8.DA.05MoraesiteBe2(PO4)(OH) · 4H2OMon.
8.DA.10RoscheriteCa2Mn2+5Be4(PO4)6(OH)4 · 6H2OMon. 2/m : B2/m
8.DA.10ZanazziiteCa2Mg5Be4(PO4)6(OH)4 · 6H2OMon. 2/m : B2/b
8.DA.10GreifensteiniteCa2Fe2+5Be4(PO4)6(OH)4 · 6H2OMon.
8.DA.10AtencioiteCa2Fe2+3Mg2Be4(PO4)6(OH)4 · 6H2O
8.DA.10RuifrancoiteCa2(◻,Mn)2(Fe3+,Mn,Mg)4Be4(PO4)6(OH)4(OH,H2O)2 · 4H2OMon. 2/m : B2/b
8.DA.10GuimarãesiteCa2Be4Zn5(PO4)6(OH)4 · 6H2OMon. 2/m : B2/b
8.DA.15UraloliteCa2Be4(PO4)3(OH)3 · 5H2OMon.
8.DA.20WeinebeneiteCaBe3(PO4)2(OH)2 · 4H2OMon.
8.DA.25TiptopiteK2(Na,Ca)2Li3Be6(PO4)6(OH)2 · H2OHex.
8.DA.30Veszelyite(Cu,Zn)2Zn(PO4)2 · 2H2OMon. 2/m : P21/b
8.DA.35Kipushite(Cu,Zn)5Zn(PO4)2(OH)6 · H2OMon.
8.DA.35Philipsburgite(Cu,Zn)6(AsO4,PO4)2(OH)6 · H2OMon.
8.DA.40SpenceriteZn4(PO4)2(OH)2 · 3H2OMon. 2/m : P2/b
8.DA.45GlucineCaBe4(PO4)2(OH)4 · 0.5H2O
8.DA.50Ianbruceite[Zn2(OH)(H2O)(AsO4)](H2O)2Mon. 2/m : P21/b

Fluorescence of FootemineiteHide

Other InformationHide

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 FootemineiteHide

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 FootemineiteHide

Localities for FootemineiteHide

This 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.

Locality ListHide

- 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Minas Gerais
    • Itinga
      • Taquaral
Leavens, P., White, J., and Nelen, J., 1990, Zanazzi from Minas Gerais, Brazil, Mineralogical Record 21, 413-417.
  • North Carolina
    • Cleveland Co.
      • Kings Mountain District
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.
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