Steedeite (original) (raw)
A valid IMA mineral species
Formula:
NaMn2[Si3BO9](OH)2
Colour:
Colorless to pale pink; white
Lustre:
Sub-Vitreous, Silky
Specific Gravity:
3.106 (Calculated)
Name:
Named in 2013 by M. M. Haring and Andrew M. McDonald in honor of Anthony Hosford Steede, dedicated mineral collector and specialist in the minerals of Mont Saint-Hilaire, Quebec, Canada.
Closely related to the sérandite-pectolite series of the pyroxenoid group and is the first mineral found to contain single loop-branched dreier silicate chains.
Non-hydrate counterpart of nolzeite.
Structurally similar to scheuchzerite and saneroite.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:41101:7
e402fc0a-482d-4f98-819d-3d2c65b091bc
IMA Classification of SteedeiteHide
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IMA status notes:
Redefined by the IMA
Approval history:
A mineral with the name "steedeite" were originally published in the CNMNC Newsletter No 7 (2010) as IMA2010-049. This was later found to be identical to catapleiite and was discredited in CMNC Newsletter No 11 (2011). The current steedeite was approved published in CNMNC Newsletter No 17 (2013) and formally described by Haring et al. (2014)
Type description reference:
Classification of SteedeiteHide
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9.DG.02
9 : SILICATES (Germanates)
D : Inosilicates
G : Inosilicates with 3-periodic single and multiple chains
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 |
|---|---|---|
| Sed | 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 SteedeiteHide
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Transparency:
Transparent, Translucent
Colour:
Colorless to pale pink; white
Fracture:
Irregular/Uneven
Density:
3.106 g/cm3 (Calculated)
Optical Data of SteedeiteHide
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Chemistry of SteedeiteHide
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Mindat Formula:
NaMn2[Si3BO9](OH)2
Crystallography of SteedeiteHide
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Class (H-M):
1 - Pinacoidal
Cell Parameters:
a = 6.837(1) Å, b = 7.575(2) Å, c = 8.841(2) Å
α = 99.91(3)°, β = 102.19(3)°, γ = 102.78 (2)°
Ratio:
a:b:c = 0.903 : 1 : 1.167
Unit Cell V:
424.81 ų (Calculated from Unit Cell)
Morphology:
Acicular crystals.
Crystal StructureHide
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0020229 | Steedeite | Haring M M M, McDonald A M (2014) Steedeite, NaMn2[Si3BO9](OH)2: characterization, crystal-structure determination, and origin The Canadian Mineralogist 52 47-60 | 2014 | Poudrette quarry, Monteregie, Quebec, Canada | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 8.454 Å | (100) |
| 7.234 Å | (39) |
| 3.331 Å | (83) |
| 3.081 Å | (38) |
| 2.859 Å | (52) |
| 2.823 Å | (80) |
| 2.477 Å | (21) |
| 2.169 Å | (25) |
Geological EnvironmentHide
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Type Occurrence of SteedeiteHide
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General Appearance of Type Material:
Bundles of slightly radiating acicular crystals to 0.5 mm.
Place of Conservation of Type Material:
Type material is deposited in the collections of the Royal Ontario Museum, Queen’s Park, Toronto, Ontario, Canada, catalogue number M56489
Geological Setting of Type Material:
Late-stage mineral in sodalite syenite
Associated Minerals at Type Locality:
Reference:
Haring, M.M.M., McDonald, A.M. (2014) Steedeite, NaMn2[Si3BO9](OH)2: Characterization, crystal-structure determination, and origin. Canadian Mineralogist: 52: 47-60.
Synonyms of SteedeiteHide
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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 | 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 | Serandite | NaMn2+2Si3O8(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 SteedeiteHide
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Weak pale green to pale yellow fluorescence under medium-wave radiation
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 SteedeiteHide
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References for SteedeiteHide
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Localities for SteedeiteHide
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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.
| Canada (TL) | |
|---|---|
| Québec Montérégie La Vallée-du-Richelieu RCM Mont Saint-Hilaire ⓘ Poudrette quarry (De-Mix quarry; Demix quarry; Uni-Mix quarry; Carrière Mont Saint-Hilaire; MSH) (TL) | Williams et al. (2011) +2 other references |