Serandite (original) (raw)
A valid IMA mineral species - grandfathered
About SeranditeHide
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Colour:
Pale pink, salmon-red, salmon-orange, deep orange, rose-red, brown, colourless
Lustre:
Vitreous, Sub-Vitreous, Greasy
Name:
Named in 1931 by Antoine François Alfred Lacroix after J.M. Serand, lighthouse keeper of the Island of Roume, Los Islands, Guinea, who assisted in collecting the mineral and who, coincidentally, had a rosy pink complexion.
The name was modified in 2015 from sérandite to serandite by IMA approval 15-E.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:3622:7
f55aa0fb-9377-4f45-b818-e357e4f78d65
IMA Classification of SeranditeHide
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Approved, 'Grandfathered' (first described prior to 1959)
Type description reference:
Classification of SeranditeHide
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9.DG.05
9 : SILICATES (Germanates)
D : Inosilicates
G : Inosilicates with 3-periodic single and multiple chains
65.2.1.5
65 : INOSILICATES Single-Width,Unbranched Chains,(W=1)
2 : Single-Width Unbranched Chains, W=1 with chains P=3
14.18.27
14 : Silicates not Containing Aluminum
18 : Silicates of Mn and Na, K, Mg, Ca or Fe
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Srd | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of SeranditeHide
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Vitreous, Sub-Vitreous, Greasy
Transparency:
Transparent, Translucent
Comment:
Fibrous aggregates are dull to silky
Colour:
Pale pink, salmon-red, salmon-orange, deep orange, rose-red, brown, colourless
Cleavage:
Perfect
On {001} and {100}
Fracture:
Irregular/Uneven, Splintery
Density:
3.34 g/cm3 (Measured) 3.42 g/cm3 (Calculated)
Optical Data of SeranditeHide
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RI values:
_n_α = 1.668 _n_β = 1.671 _n_γ = 1.703
2V:
Measured: 39° , Calculated: 39°
δ = 0.035
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Dispersion:
r < v moderate
Chemistry of SeranditeHide
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Mindat Formula:
NaMn2+2Si3O8(OH)
Common Impurities:
Al,Fe,Mg,K,H2O
Chemical AnalysisHide
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Empirical formulas:
| Sample ID | Empirical Formula |
|---|---|
| 1 | (Na0.98Ca0.02)(Mn2+0.98Ca0.02)Mn2+1.00[Si2.99O8](OH) |
Crystallography of SeranditeHide
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Class (H-M):
1 - Pinacoidal
Cell Parameters:
a = 7.683(1) Å, b = 6.889(1) Å, c = 6.747(1) Å
α = 90.53(5)°, β = 94.12(2)°, γ = 102.75(2)°
Ratio:
a:b:c = 1.115 : 1 : 0.979
Unit Cell V:
347.29 ų (Calculated from Unit Cell)
Morphology:
Blocky prismatic to acicular crystals.
Twinning:
Around [010] composition plane {100}, less commonly contact twin on {110}.
Crystal StructureHide
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0000499 | Serandite | Takeuchi Y, Kudoh Y, Yamanaka T (1976) Crystal chemistry of the serandite-pectolite series and related minerals American Mineralogist 61 229-237 |  |
1976 | 0 | 293 | |
| 0000623 | Serandite | Ohashi Y, Finger L W (1978) The role of octahedral cations in pyroxenoid crystal chemistry. I. Bustamite, wollastonite, and the pectolite-schizolite-serandite series sample SRN, from Rouma, Island of Los, Guinea American Mineralogist 63 274-288 | |
1978 | 0 | 293 | |
| 0002430 | Serandite | Jacobsen S D, Smyth J R, Swope R J, Sheldon R I (2000) Two proton positions in the very strong hydrogen bond of serandite, NaMn2[Si3O8(OH)] American Mineralogist 85 745-752 | |
2000 | 0 | 293 | |
| 0002431 | Serandite | Jacobsen S D, Smyth J R, Swope R J, Sheldon R I (2000) Two proton positions in the very strong hydrogen bond of serandite, NaMn2[Si3O8(OH)] American Mineralogist 85 745-752 | |
2000 | 0 | 293 | |
| 0020402 | Serandite | Williams E R, Weller M T (2014) A variable-temperature neutron diffraction study of serandite: A Mn-silicate framework with a very strong, two-proton site, hydrogen bond American Mineralogist 99 1755-1760 | 2014 | Mont St. Hilaire, Quebec, Canada | 0 | 4 | |
| 0020403 | Serandite | Williams E R, Weller M T (2014) A variable-temperature neutron diffraction study of serandite: A Mn-silicate framework with a very strong, two-proton site, hydrogen bond American Mineralogist 99 1755-1760 | 2014 | Mont St. Hilaire, Quebec, Canada | 0 | 150 | |
| 0020404 | Serandite | Williams E R, Weller M T (2014) A variable-temperature neutron diffraction study of serandite: A Mn-silicate framework with a very strong, two-proton site, hydrogen bond American Mineralogist 99 1755-1760 | 2014 | Mont St. Hilaire, Quebec, Canada | 0 | 298 | |
| 0020405 | Serandite | Williams E R, Weller M T (2014) A variable-temperature neutron diffraction study of serandite: A Mn-silicate framework with a very strong, two-proton site, hydrogen bond American Mineralogist 99 1755-1760 | 2014 | Mont St. Hilaire, Quebec, Canada | 0 | 575 | |
| 0020406 | Serandite | Williams E R, Weller M T (2014) A variable-temperature neutron diffraction study of serandite: A Mn-silicate framework with a very strong, two-proton site, hydrogen bond American Mineralogist 99 1755-1760 | 2014 | Mont St. Hilaire, Quebec, Canada | 0 | 800 | |
| 0010758 | Serandite | Takeuchi Y, Kudoh Y, Haga N (1973) The interpretation of partial Patterson functions and its application to structure analyses of serandite Mn2NaHSi3O9 and banalsite BaNa2Al4Si4O16 Zeitschrift fur Kristallographie 138 313-336 | |
1973 | Tanohata mine, Japan | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 7.51 Å | (25) |
| 3.158 Å | (90) |
| 2.983 Å | (100) |
| 2.838 Å | (65) |
| 2.602 Å | (35) |
| 2.495 Å | (45) |
| 2.192 Å | (60) |
Geological EnvironmentHide
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Geological Setting:
In sodalite zenoliths and pegmatites, phonolite, contact metamorphic rocks.
Type Occurrence of SeranditeHide
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General Appearance of Type Material:
Place of Conservation of Type Material:
National Museum of Natural History (Smithsonian Institution), Washington, D.C., USA, number 96515.
Geological Setting of Type Material:
Associated Minerals at Type Locality:
Reference:
Lacroix, A. (1931) Les pegmatites de la syènite sodalitique de l'Îsle Rouma (Archipel de Los, Guinèe française). Desciption d'un nouveau minéral (sérandite) qu'elles renferment. Comptes Rendu, Academie des Sciences, Paris: 192(4): 187 194.
Other Language Names for SeranditeHide
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Varieties of SeranditeHide
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Relationship of Serandite to other SpeciesHide
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Other Members of this group:
Common AssociatesHide
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Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat GroupingHide
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| 9.DG. | Calcinaksite | KNaCa(Si4O10) · H2O | Tric. 1 : _P_1 |
|---|---|---|---|
| 9.DG. | Barrydawsonite-(Y) | Na1.5Y0.5CaSi3O8(OH) | Mon. 2/m : _P_21/b |
| 9.DG. | Paratobermorite | Ca4(Al0.5Si0.5)2Si4O16(OH)(H2O)2 · (Ca · 3H2O) | Mon. 2/m |
| 9.DG. | Alvesite | NaKZrSi6O15 · 2H2O | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 9.DG.02 | Steedeite | NaMn2[Si3BO9](OH)2 | Tric. 1 : _P_1 |
| 9.DG.02 | Nolzeite | NaMn2[Si3BO9](OH)2 · 2H2O | Tric. 1 : _P_1 |
| 9.DG.05 | Bustamite | CaMn2+(Si2O6) | Tric. 1 : _P_1 |
| 9.DG.05 | Ferrobustamite | CaFe2+(Si2O6) | Tric. 1 |
| 9.DG.05 | Pectolite | NaCa2Si3O8(OH) | Tric. 1 : _P_1 |
| 9.DG.05 | Wollastonite | Ca3(Si3O9) | Tric. 1 : _P_1 |
| 9.DG.05 | Wollastonite-1A | CaSiO3 | Tric. 1 : _P_1 |
| 9.DG.05 | Tanohataite | LiMn2Si3O8(OH) | Tric. 1 : _P_1 |
| 9.DG.05 | Schizolite | NaCaMnSi3O8(OH) | Tric. 1 : _P_1 |
| 9.DG.05 | Murakamiite | LiCa2Si3O8(OH) | Tric. 1 : _P_1 |
| 9.DG.05 | Dalnegorskite | Ca5Mn(Si3O9)2 | Tric. 1 : _P_1 |
| 9.DG.07 | Cascandite | CaScSi3O8(OH) | Tric. 1 |
| 9.DG.08 | Plombièrite | [Ca4Si6O16(OH)2 · 2H2O] · (Ca · 5H2O) | Orth. |
| 9.DG.10 | Clinotobermorite | [Ca4Si6O17 · 2H2O] · (Ca · 3H2O) | Mon. |
| 9.DG.10 | Riversideite | Ca5(HSi3O9)2 · 2H2O | Orth. |
| 9.DG.10 | Tobermorite | Ca4Si6O17(H2O)2 · (Ca · 3H2O) | Mon. 2 : _P_21 |
| 9.DG.12 | Jusite | Na2Ca15Al4Si16O54 · 17H2O | |
| 9.DG.12 | Kenotobermorite | Ca4Si6O15(OH)2(H2O)2 · 3H2O | Mon. |
| 9.DG.15 | Foshagite | Ca4(Si3O9)(OH)2 | Tric. 1 : _P_1 |
| 9.DG.20 | Jennite | Ca9(Si3O9)2(OH)8 · 8H2O | Tric. 1 : _P_1 |
| 9.DG.20 | Kamenevite | K2TiSi3O9 · H2O | Orth. 222 : _P_212121 |
| 9.DG.25 | Paraumbite | K3Zr2H(Si3O9)2 · nH2O | Orth. m _m_2 |
| 9.DG.25 | Umbite | K2(Zr,Ti)Si3O9 · H2O | Orth. 222 : _P_212121 |
| 9.DG.30 | Sørensenite | Na4SnBe2Si6O16(OH)4 | Mon. 2/m : _B_2/b |
| 9.DG.32 | Escheite | Ca2NaMnTi5[Si12O34]O2(OH)3 · 12H2O | Orth. m _m_2 : A m _a_2 |
| 9.DG.35 | Xonotlite | Ca6(Si6O17)(OH)2 | Mon. 2/m : _B_2/m |
| 9.DG.40 | Hillebrandite | Ca2(SiO3)(OH)2 | Orth. m m m _(_2/_m_2/_m_2/m ) : C m c m |
| 9.DG.45 | Zorite | Na8(Ti,Nb)5(Si6O17)2(OH,O)5 · 14H2O | Orth. |
| 9.DG.45 | Chivruaiite | Ca4(Ti,Nb)5(Si6O17)2(OH,O)5 · 13-14H2O | Orth. m m m _(_2/_m_2/_m_2/m ) : C m m m |
| 9.DG.50 | Haineaultite | (Na,Ca)5Ca(Ti,Nb)5(Si6O17)2(OH,F)8 · 5H2O | Orth. 222 : _C_222 |
| 9.DG.55 | Epididymite | Na2Be2Si6O15 · H2O | Orth. m m m _(_2/_m_2/_m_2/m ) : P n m a |
| 9.DG.60 | Eudidymite | Na2Be2Si6O15 · H2O | Mon. 2/m : _B_2/b |
| 9.DG.65 | Elpidite | Na2ZrSi6O15 · 3H2O | Orth. |
| 9.DG.65 | Patynite | NaKCa4[Si9O23] | Tric. 1 : _P_1 |
| 9.DG.67 | Whelanite | Cu2+2Ca6[Si6O17(OH)](CO3)(OH)3 · 2H2O | Orth. m _m_2 : P n _n_2 |
| 9.DG.70 | Fenaksite | (K,Na)4(Fe,Mn)2(Si4O10)2(OH,F) | Tric. 1 : _P_1 |
| 9.DG.70 | Litidionite | CuNaKSi4O10 | Tric. 1 : _P_1 |
| 9.DG.70 | Manaksite | KNaMnSi4O10 | Tric. 1 : _P_1 |
| 9.DG.70 | Yusupovite | Na2Zr(Si6O15) · 2.5H2O | Mon. 2/m : _B_2/m |
| 9.DG.70 | Enricofrancoite | KNaCaSi4O10 | Tric. 1 : _P_1 |
| 9.DG.75 | Tinaksite | K2Na(Ca,Mn2+)2TiO[Si7O18(OH)] | Tric. |
| 9.DG.75 | Tokkoite | K2Ca4[Si7O18(OH)](OH,F) | Tric. |
| 9.DG.75 | Senkevichite | CsKNaCa2TiO[Si7O18](OH) | Tric. 1 : _P_1 |
| 9.DG.80 | Canasite | K3Na3Ca5Si12O30(OH)4 | Mon. m : B m |
| 9.DG.80 | Fluorcanasite | K3Na3Ca5Si12O30F4 · H2O | Mon. m : B m |
| 9.DG.85 | Miserite | K1.5-x(Ca,Y,REE)5(Si6O15)(Si2O7)(OH,F)2 · yH2O | Tric. |
| 9.DG.90 | Frankamenite | K3Na3Ca5(Si12O30)(F,OH)4 · H2O | Tric. 1 : _P_1 |
| 9.DG.92 | Charoite | (K,Sr)15-16(Ca,Na)32[Si6O11(O,OH)6]2[Si12O18(O,OH)12]2[Si17O25(O,OH)18]2(OH,F)4 · ~3H2O | Mon. 2/m : _P_21/m |
| 9.DG.95 | Yuksporite | K4(Ca,Na)14(Sr,Ba)2(◻,Mn,Fe)(Ti,Nb)4(O,OH)4(Si6O17)2(Si2O7)3(H2O,OH)3 | Mon. 2/m : _P_21/m |
| 9.DG.97 | Eveslogite | (Na,K,Ca,Sr,Ba)48 [(Ti,Nb,Mn,Fe2+)12Si48O144(OH)12](F,OH,Cl)14 | Mon. 2/m : _P_2/m |
Fluorescence of SeranditeHide
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Other InformationHide
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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 SeranditeHide
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References for SeranditeHide
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Reference List:
Nagashima, Mariko, Imaoka, Teruyoshi, Fukuda, Chihiro, Pettke, Thomas (2018) Relationship between cation substitution and hydrogen-bond system in hydrous pyroxenoids with three-periodic single-chain of SiO4 tetrahedra: pectolite, murakamiite, marshallsussmanite, serandite and tanohataite. European Journal of Mineralogy, 30 (3) 451-463 doi:10.1127/ejm/2018/0030-2744
Localities for SeranditeHide
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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
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- 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.