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Henritermierite

A valid IMA mineral species
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05653310017271923737146.jpg
Henritermierite, etc.

N'Chwaning II Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
05944560017271923764202.jpg
Henritermierite

N'Chwaning II Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
04100320017271923791101.jpg
Henritermierite

Wessels Mine, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
03529880017866376779877.jpg
Henritermierite, etc.

N'Chwaning II Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
00413190017866377477291.jpg
Henritermierite

N'Chwaning II Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
04100320017271923791101.jpg
Henritermierite

Wessels Mine, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
05653310017271923737146.jpg
Henritermierite, etc.

N'Chwaning II Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
05944560017271923764202.jpg
Henritermierite

N'Chwaning II Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
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About HenritermieriteHide

08392570017271923911993.jpg
Henri and Geneviève Termier
Formula:
Ca3Mn3+2(SiO4)2[◻(OH)4]
Colour:
Clove-brown to apricot-brown; lemon-yellow to pale yellow in thin section.
Lustre:
Vitreous
Specific Gravity:
3.34
Crystal System:
Tetragonal
Name:
Named in 1969 by C. Gaudefroy, M. Orliac, F. Permingeat, and A. Parfenoff, in honor of Henri François Émile Termier (13 December 1897, Lyon, France - 12 August 1989, Gif sur Yvette, France), geologist known for his studies of the stratigraphy and paleontology of North Africa and France. He was, for a time, head of the Morocco Geological Service and later, professor at the University of Algiers and the Sorbonne.
Garnet Group. The Mn(III) analogue of Holtstamite.


Unique IdentifiersHide

Mindat ID:
1868
Long-form identifier:
mindat:1:1:1868:1

IMA Classification of HenritermieriteHide

Classification of HenritermieriteHide

Strunz-mindat (2026):
9.AD.25

9 : SILICATES (Germanates)
A : Nesosilicates
D : Nesosilicates without additional anions; cations in [6] and/or greater coordination
Dana 8th ed.:
51.4.4.1

51 : NESOSILICATES Insular SiO4 Groups Only
4 : Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Hey's CIM Ref.:
16.16.19

16 : Silicates Containing Aluminum and other Metals
16 : Aluminosilicates of Mn

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference for Standard
HriIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of HenritermieriteHide

Lustre:
Vitreous
Transparency:
Translucent
Colour:
Clove-brown to apricot-brown; lemon-yellow to pale yellow in thin section.
Streak:
White
Fracture:
Conchoidal
Density:
3.34(2) g/cm3 (Measured)    3.40 g/cm3 (Calculated)

Optical Data of HenritermieriteHide

Type:
Uniaxial (+)
RI values:
nω = 1.765 nε = 1.8
Max. Birefringence:
δ = 0.035
Based on recorded range of RI values above.

Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.

Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.

Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.

Surface Relief:
Very High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).

This shows the grain boundary and Becke line effect under plane-polarised light, based on the contrast between this mineral's average refractive index and the mounting medium. It does not take into account mineral colouration.
In focus
Interference Figure:
This shows the idealized uniaxial interference figure - the conoscopic (convergent-light, Bertrand-lens-in) view, for a grain cut with the optic axis centred and vertical. The coloured rings are isochromatics, computed with the same physics as the Michel-Lévy bar above; the dark cross is the isogyre.

For a genuinely uniaxial mineral viewed this way, that cross stays perfectly stationary if you rotate the stage - unlike a biaxial mineral, where it splits apart on rotation. That invariance is itself the standard diagnostic test for telling uniaxial and biaxial minerals apart at the microscope.
Pleochroism:
Weak
Comments:
O = very pale yellow
E = lemon-yellow

Chemistry of HenritermieriteHide

Mindat Formula:
Ca3Mn3+2(SiO4)2[◻(OH)4]
Element Weights:
Element% weight
O39.807 %
Ca24.929 %
Mn22.781 %
Si11.646 %
H0.836 %

Calculated from ideal end-member formula.
Elements listed:
Ca, H, Mn, O, Si - search for minerals with similar chemistry
Common Impurities:
Fe

Crystallography of HenritermieriteHide

Crystal System:
Tetragonal
Class (H-M):
4/mmm(4/m2/m2/m) - Ditetragonal Dipyramidal
Space Group:
I41/acd
Cell Parameters:
a = 12.39 Å, c = 11.91 Å
Ratio:
a:c = 1 : 0.961
Unit Cell V:
1,828.33 ų (Calculated from Unit Cell)
Z:
8
Morphology:
As pseudo-octahedral crystals, to 3mm, and as aggregates of small grains.
Twinning:
Common on {101} sectored

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.75 Å(very very strong)
2.516 Å(very strong)
4.37 Å(strong)
3.09 Å(strong)
2.98 Å(strong)
2.684 Å(moderately strong)
1.614 Å(moderately strong)
Comments:
Tachgagalt mine, Morocco. Data from the type description.

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
High-? alteration and/or metamorphism
32 : Ba/Mn/Pb/Zn deposits, including metamorphic deposits
Geological Setting:
Manganese deposits

Type Occurrence of HenritermieriteHide

Type Locality:
ⓘ Tachgagalt Mine, Tansifte Caïdat, Agdz Cercle, Zagora Province, Drâa-Tafilalet Region, Morocco
General Appearance of Type Material:
Aggregates of small grains up to 0.5 mm; mostly about 0.2 mm in diameter, filling interstices between crystals of marokite, hausmannite, and rare gaudefroyite.
Place of Conservation of Type Material:
Ecole Nationale Supérieure des Mines, Paris, France, numbers 51098, 51099 (holotype).
FS, Toulouse, France (cotype).
Geological Survey of Morocco, Rabat, Morocco (cotype).
Muséum Nationale d’Histoire Naturelle, Paris, France, number 175.139 (holotype).
Associated Minerals at Type Locality:
MarokiteHausmanniteGaudefroyiteCalcite
Reference:
Gaudefroy, Christophe, Orliac, Marcel, Permingeat, François, Parfenoff, Alexandre (1969) L'henritermiérite, une nouvelle espèce minérale. Bulletin de Minéralogie, 92 (2) 185-190 doi:10.3406/bulmi.1969.6335

Synonyms of HenritermieriteHide

Other Language Names for HenritermieriteHide

Simplified Chinese:水钙锰榴石
Traditional Chinese:水鈣錳榴石

Relationship of Henritermierite to other SpeciesHide

Member of:
Henritermierite Group > Garnet Supergroup
Other Members of Henritermierite Group:
HoltstamiteCa3Al2(SiO4)2[◻(OH)4]Tet. 4/mmm(4/m2/m2/m) : I41/acd

Common AssociatesHide

Associations Based on Photo Data:
8 photos of Henritermierite associated with EttringiteCa6Al2(SO4)3(OH)12 · 26H2O
7 photos of Henritermierite associated with HausmanniteMn2+Mn3+2O4
5 photos of Henritermierite associated with SturmaniteCa6Fe3+2(SO4)2.5[B(OH)4](OH)12 · 25H2O
5 photos of Henritermierite associated with GaudefroyiteCa4Mn3+2-3(BO3)3(CO3)(O,OH)3
4 photos of Henritermierite associated with CalciteCaCO3
4 photos of Henritermierite associated with MarokiteCaMn3+2O4
1 photo of Henritermierite associated with ManganvesuvianiteCa19Mn3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9
1 photo of Henritermierite associated with BrauniteMn2+Mn3+6(SiO4)O8
1 photo of Henritermierite associated with HematiteFe2O3

Related Minerals - Strunz-mindat GroupingHide

9.AD.AdrianiteCa12(Al4Mg3Si7)O32Cl6Iso. 43m : I43d
9.AD.05LarniteCa2SiO4Mon. 2/m
9.AD.10Calcio-olivineCa2SiO4Orth. mmm(2/m2/m2/m)
9.AD.15MerwiniteCa3Mg(SiO4)2Mon. 2/m : P21/b
9.AD.20BredigiteCa7Mg(SiO4)4Orth. mm2 : Pnn2
9.AD.25MidbariteCa3Mg2(V5+2Si)O12Iso. m3m(4/m32/m) : Ia3d
9.AD.25Menzerite-(Y)(Y2Ca)Mg2(SiO4)3Iso. m3m(4/m32/m) : Ia3d
9.AD.25UvaroviteCa3Cr3+2(SiO4)3Iso. m3m(4/m32/m) : Ia3d
9.AD.25EltyubyuiteCa12Fe3+10Si4O32Cl6Iso. 43m : I43d
9.AD.25EringaiteCa3Sc2(SiO4)3Iso. m3m(4/m32/m) : Ia3d
9.AD.25 va'Hydrougrandite'(Ca,Mg,Fe2+)3(Fe3+,Al)2[(OH)4(SiO4)2]Iso.
9.AD.25CalderiteMn2+3Fe3+2(SiO4)3Iso. m3m(4/m32/m) : Ia3d
9.AD.25NikmelnikoviteCa12(Fe2+Fe3+3Al3◻)[SiO4]6[◻(OH)4]5◻4Trig. 3 : R3
9.AD.25HutcheoniteCa3Ti2(SiO4)(AlO4)2Iso. m3m(4/m32/m) : Ia3d
9.AD.25Wadalite(Ca,Mg)6(Al,Fe3+)4((Si,Al)O4)3O4Cl3Iso. 43m : I43d
9.AD.25RubiniteCa3Ti3+2(SiO4)3Iso. m3m(4/m32/m) : Ia3d
9.AD.25KerimasiteCa3Zr2(SiO4)(Fe3+O4)2Iso. m3m(4/m32/m) : Ia3d
9.AD.25HoltstamiteCa3Al2(SiO4)2[◻(OH)4]Tet. 4/mmm(4/m2/m2/m) : I41/acd
9.AD.25SpessartineMn2+3Al2(SiO4)3Iso. m3m(4/m32/m) : Ia3d
9.AD.25ToturiteCa3Sn2(SiO4)(Fe3+O4)2Iso. m3m(4/m32/m) : Ia3d
9.AD.25KimzeyiteCa3Zr2(SiO4)(AlO4)2Iso. m3m(4/m32/m) : Ia3d
9.AD.25'Khoharite'Mg3Fe3+2(SiO4)3
9.AD.25IrinarassiteCa3Sn2(SiO4)(AlO4)2Iso. m3m(4/m32/m) : Ia3d
9.AD.25KnorringiteMg3Cr3+2(SiO4)3Iso. m3m(4/m32/m) : Ia3d
9.AD.25GoldmaniteCa3V3+2(SiO4)3Iso. m3m(4/m32/m) : Ia3d
9.AD.25'Blythite'Mn2+3Mn3+2[SiO4]3
9.AD.25'Skiagite'Fe2+3Fe3+2[SiO4]3
9.AD.25'UM1984-37-SiO:CrMn'Mn2+3Cr3+2(SiO4)3
9.AD.25AlmandineFe2+3Al2(SiO4)3Iso. m3m(4/m32/m) : Ia3d
9.AD.25 va'Yamatoite'(Mn2+,Ca)3(V3+,Al)2(SiO4)3Iso.
9.AD.25MomoiiteMn2+3V3+2(SiO4)3Iso. m3m(4/m32/m) : Ia3d
9.AD.25GrossularCa3Al2(SiO4)3Iso. m3m(4/m32/m) : Ia3d
9.AD.25AndraditeCa3Fe3+2(SiO4)3Iso. m3m(4/m32/m) : Ia3d
9.AD.25MorimotoiteCa3(TiFe2+)(SiO4)3Iso. m3m(4/m32/m) : Ia3d
9.AD.25MajoriteMg3(MgSi)(SiO4)3Iso. m3m(4/m32/m) : Ia3d
9.AD.25PyropeMg3Al2(SiO4)3Iso. m3m(4/m32/m) : Ia3d
9.AD.25SchorlomiteCa3Ti2(SiO4)(Fe3+O4)2Iso. m3m(4/m32/m) : Ia3d
9.AD.30HafnonHf(SiO4)Tet. 4/mmm(4/m2/m2/m) : I41/amd
9.AD.30ZirconZr(SiO4)Tet. 4/mmm(4/m2/m2/m) : I41/amd
9.AD.30CoffiniteU(SiO4) · nH2OTet. 4/mmm(4/m2/m2/m) : I41/amd
9.AD.30ThoriteTh(SiO4)Tet. 4/mmm(4/m2/m2/m) : I41/amd
9.AD.30 va'Auerlite'near Th(Si,P)O4
9.AD.30Stetindite-(Ce)Ce4+SiO4Tet. 4/mmm(4/m2/m2/m) : I41/amd
9.AD.35'Tombarthite-(Y)'Y4(Si,H4)4O12-x(OH)4+2xMon.
9.AD.35HuttoniteThSiO4Mon. 2/m
9.AD.40EulytineBi4(SiO4)3Iso. 43m : I43d
9.AD.45ReiditeZr(SiO4)Tet. 4/m : I41/a
9.AD.55JeffbeniteMg3Al2Si3O12Tet. 42m : I42d

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.

Internet Links for HenritermieriteHide

References for HenritermieriteHide

Reference List:
Gaudefroy, Christophe, Orliac, Marcel, Permingeat, François, Parfenoff, Alexandre (1969) L'henritermiérite, une nouvelle espèce minérale. Bulletin de Minéralogie, 92 (2) 185-190 doi:10.3406/bulmi.1969.6335
Fleischer, Michael (1969) New Mineral Names. American Mineralogist, 54 (11-12) 1737-1742
Aubry, André, Dusausoy, Yves, Laffaille, Alain, Protas, Jean (1969) Détermination et étude de la structure cristalline de l'henritermiérite, hydrogrenat de symétrie quadratique. Bulletin de Minéralogie, 92 (2) 126-133 doi:10.3406/bulmi.1969.6330
Gaudefroy, Christophe, Orliac, Marcel, Permingeat, François, Parfenoff, Alexandre (1969) L'henritermiérite, une nouvelle espèce minérale. Bulletin de Minéralogie, 92 (2) 185-190 doi:10.3406/bulmi.1969.6335
Armbruster, T., Kohler, T., Libowitzky, E., Friedrich, A., Miletich, R., Kunz, M., Medenbach, O., Gutzmer, J. (2001) Structure, compressibility, hydrogen bonding, and dehydration of the tetragonal Mn3+ hydrogarnet, henritermierite. American Mineralogist: 86: 147-158.
(2001) Henritermierite. Handbook of Mineralogy. Mineralogical Society of America
Shannon, Robert D., Shannon, Ruth C., Medenbach, Olaf, Fischer, Reinhard X. (2002) Refractive Index and Dispersion of Fluorides and Oxides. Journal of Physical and Chemical Reference Data, 31 (4) 931-970 doi:10.1063/1.1497384
Grew, E. S., Locock, A. J., Mills, S. J., Galuskina, I. O., Galuskin, E. V., Hålenius, U. (2013) Nomenclature of the garnet supergroup. American Mineralogist, 98 (4) 785-811 doi:10.2138/am.2013.4201
Cruickshank, L.A. (2018) Crystal Chemistry and Structure of kimzeyite, Ca3Zr2[Al2Si]Σ3O12, henritermierite, Ca3Mn2[(SiO4)2(O4H4)1]Σ3, (OH,F)-spessartine, Mn2+3Al2[(SiO4)2(O4H4,F4)1]Σ3, and hausmannite, Mn3O4. Master of Science thesis, University of Calgary, Calgary, Alberta, Canada.
Antao, Sytle M., Cruickshank, Laura A. (2018) Crystal structure refinements of tetragonal (OH,F)-rich spessartine and henritermierite garnets. Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials, 74 (1). 104-114 doi:10.1107/s2052520617018248

Localities for HenritermieriteHide

Showing 5 localities.

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.
Hide all sections | Show all sections

Locality ListHide

- 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). 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Morocco (TL)
 
  • Drâa-Tafilalet Region
    • Zagora Province
      • Agdz Cercle
        • Tansifte Caïdat
Bull.Soc.fr.Min.Crist. 92 (1969) +1 other reference
South Africa
 
  • Northern Cape
    • John Taolo Gaetsewe District Municipality
      • Joe Morolong Local Municipality
        • N'Chwaning Mines
Pohl et al. (1991)
Cairncross et al. (1995)
Pohl et al. (1991) +2 other references
Sweden
 
  • Värmland County
    • Filipstad
      • Långban Ore District
Österberg (2003)
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