Stevensite
A valid IMA mineral species - grandfathered - questionable
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About Stevensite
Edwin Augustus Stevens
Formula:
(Ca,Na)xMg3-x(Si4O10)(OH)2
Colour:
White, pale yellow, pale brown, pale pink
Lustre:
Waxy, Earthy
Hardness:
2½
Specific Gravity:
2.15 - 2.57
Crystal System:
Monoclinic
Member of:
Name:
Named after Edwin Augustus Stevens (28 July 1795, Castle Point, Hoboken, New Jersey, USA - 8 August 1868, Paris, France), founder of the Stevens Institute of Technology, Hoboken, New Jersey (USA), in recognition of the high technical expertise achieved by engineering graduates of his college. Stevens was a co-founder of the Union Line Transportation Company in 1823, which began operation in the 1830s with one of the first railroads in the USA.
Type Locality:
Isostructural with:
This page provides mineralogical data about Stevensite.
Unique Identifiers
Mindat ID:
3770
Long-form identifier:
mindat:1:1:3770:5
IMA Classification of Stevensite
Approved, 'Grandfathered' (first described prior to 1959), Questionable
IMA Formula:
(Ca,Na)xMg3-ySi4O10(OH)2
Classification of Stevensite
9.EC.45
9 : SILICATES (Germanates)
E : Phyllosilicates
C : Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets
9 : SILICATES (Germanates)
E : Phyllosilicates
C : Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets
71.3.1b.6
71 : PHYLLOSILICATES Sheets of Six-Membered Rings
3 : Sheets of 6-membered rings with 2:1 clays
71 : PHYLLOSILICATES Sheets of Six-Membered Rings
3 : Sheets of 6-membered rings with 2:1 clays
14.4.14
14 : Silicates not Containing Aluminum
4 : Silicates of Mg
14 : Silicates not Containing Aluminum
4 : Silicates of Mg
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Stv | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Stv | Whitney & Evans (2010) | Whitney, D.L. and Evans, B.W. (2010) Abbreviations for names of rock-forming minerals. American Mineralogist, 95, 185–187 doi:10.2138/am.2010.3371 |
| Stv | Warr (2020) | Warr, L.N. (2020) Recommended abbreviations for the names of clay minerals and associated phases. Clay Minerals, 55, 261–264 doi:10.1180/clm.2020.30 |
Pronunciation of Stevensite
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon Ralph | United Kingdom |
Physical Properties of Stevensite
Waxy, Earthy
Transparency:
Translucent
Colour:
White, pale yellow, pale brown, pale pink
Streak:
White
Hardness:
2½ on Mohs scale
Comment:
High hardness may be due to relict pectolite
Tenacity:
Fragile
Cleavage:
Perfect
{001}
{001}
Fracture:
Irregular/Uneven
Comment:
Usually in clay-sized particles
Density:
2.15 - 2.57 g/cm3 (Measured) 2.07 g/cm3 (Calculated)
Comment:
May have relict pectolite
Optical Data of Stevensite
Type:
Biaxial (+)
RI values:
nα = 1.50 - 1.56 nβ = 1.50 - 1.56 nγ = 1.51 - 1.57 n = 1.50 - 1.51
Birefringence:
0.01
Max. Birefringence:
δ = 0.010
Based on recorded range of RI values above.
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.
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:
Moderate (negative)
Relative to Canada balsam mounting medium (n ≈ 1.537).
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 biaxial acute bisectrix (Bxa) interference figure
- the conoscopic view for a grain cut perpendicular to the acute bisectrix, using
this mineral's 2V. The two small white dots mark the melatopes - the points
where the two optic axes emerge - and are shown only when they fall within the
field of view. The coloured bands are isochromatics, and the dark bands are
isogyres.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
No measured or calculated 2V is on file for this mineral, so the value used here (0°) is estimated from its recorded refractive indices and optic sign, not from a direct 2V measurement.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
No measured or calculated 2V is on file for this mineral, so the value used here (0°) is estimated from its recorded refractive indices and optic sign, not from a direct 2V measurement.
Dispersion:
none
Optical Extinction:
May be isotropic
Pleochroism:
Non-pleochroic
Comments:
High refractive indices may be due to dehydration or transition to nontronite, etc.
Chemistry of Stevensite
Mindat Formula:
(Ca,Na)xMg3-x(Si4O10)(OH)2
Common Impurities:
Ti,Al,Fe,Mn,Na,K,H2O
Crystallography of Stevensite
Crystal System:
Monoclinic
Cell Parameters:
a = 5.26 Å, b = 9.108 Å, c = 15.3 Å
Ratio:
a:b:c = 0.578 : 1 : 1.68
Unit Cell V:
0.00 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Usually clay-sized particles
Comment:
Disordered
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 15.5 Å | (100) |
| 5.0 Å | (10) |
| 4.53 Å | (35) |
| 4.30 Å | (1) |
| 3.10 Å | (12) |
| 2.57 Å | (`1) |
| 2.54 Å | (12) |
| 2.49 Å | (1) |
| 2.27 Å | (4) |
| 1.91 Å | (4) |
| 1.87 Å | (6) |
| 1.71 Å | (4) |
| 1.518 Å | (15) |
Comments:
25-1498; Basal spacing variable as is the case with Smectite. Dehydrated stevensite may have a 14 A spacing. Expands with intercalation.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 3b: Earth’s earliest hydrosphere | >4.45 |
| 16 : Low-? aqueous alteration of Hadean subaerial lithologies (see also #23) | |
| Near-surface Processes | |
| 24 : Authigenic minerals in terrestrial sediments (see also #17) | |
| 25 : Evaporites (prebiotic) | |
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] |
Type Occurrence of Stevensite
General Appearance of Type Material:
radiate, forming arrow-headed masses
Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA, number R4719.
Geological Setting of Type Material:
veins in trap rock
Associated Minerals at Type Locality:
Synonyms of Stevensite
Other Language Names for Stevensite
Relationship of Stevensite to other Species
Member of:
Other Members of Smectite Group:
| Beidellite | (Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2O | Mon. 2/m : B2/m |
| Ferrosaponite | Ca0.3(Fe2+,Mg,Fe3+)3((Si,Al)4O10)(OH)2 · 4H2O | Mon. |
| Hectorite | Na0.3(Mg,Li)3(Si4O10)(F,OH)2 | Mon. 2/m : B2/m |
| Montmorillonite | (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O | Mon. 2/m : B2/m |
| Nontronite | Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O | Mon. 2/m : B2/m |
| 'Pimelite' | Ni3Si4O10(OH)2 · 4H2O | Hex. |
| Saliotite | (Li,Na)Al3(AlSi3O10)(OH)5 | Mon. 2/m : B2/m |
| Saponite | Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O | Mon. |
| Sauconite | Na0.3Zn3((Si,Al)4O10)(OH)2 · 4H2O | Mon. |
| Swinefordite | Li(Al,Li,Mg)3((Si,Al)4O10)2(OH,F)4 · nH2O | Mon. 2/m : B2/m |
| Volkonskoite | Ca0.3(Cr,Mg,Fe)2((Si,Al)4O10)(OH)2 · 4H2O | Mon. |
| Yakhontovite | (Ca,Na)0.5(Cu,Fe,Mg)2(Si4O10)(OH)2 · 3H2O | Mon. |
| Zincsilite | Zn3Si4O10(OH)2 · 4H2O (?) | Mon. |
Common Associates
Associations Based on Photo Data:
| 6 photos of Stevensite associated with Pectolite | NaCa2Si3O8(OH) |
| 4 photos of Stevensite associated with Calcite | CaCO3 |
| 3 photos of Stevensite associated with Quartz | SiO2 |
| 3 photos of Stevensite associated with Prehnite | Ca2Al2Si3O10(OH)2 |
| 2 photos of Stevensite associated with Laumontite | CaAl2Si4O12 · 4H2O |
| 1 photo of Stevensite associated with Strontiojoaquinite | Sr2Ba2(Na,Fe)2Ti2[Si4O12]2O2(O,OH)2 · H2O |
| 1 photo of Stevensite associated with Datolite | CaB(SiO4)(OH) |
| 1 photo of Stevensite associated with Diopside | CaMgSi2O6 |
| 1 photo of Stevensite associated with Apophyllite Group | AB4[Si8O20]X · 8H2O |
| 1 photo of Stevensite associated with Wakefieldite-(La) | La(VO4) |
Related Minerals - Strunz-mindat Grouping
| 9.EC. | Meifuite | KFe6(Si7Al)O19(OH)4Cl2 |
| 9.EC. | Balestraite | KLi2V5+Si4O12 |
| 9.EC.05 | Talc | Mg3Si4O10(OH)2 |
| 9.EC.05 | Minnesotaite | Fe2+3Si4O10(OH)2 |
| 9.EC.05 | Willemseite | Ni3Si4O10(OH)2 |
| 9.EC.9.EC. | Voloshinite | Rb(LiAl1.5◻0.5)(Al0.5Si3.5)O10F2 |
| 9.EC.10 | Fluorluanshiweiite | KLiAl1.5(Si3.5Al0.5)O10F2 |
| 9.EC.10 | Garmite | CsLiMg2(Si4O10)F2 |
| 9.EC.10 | Gorbunovite | CsLi2(Ti,Fe)Si4O10(F,OH,O)2 |
| 9.EC.10 | Ferripyrophyllite | Fe3+Si2O5(OH) |
| 9.EC.10 | Manganiceladonite | K(MgMn3+◻)(Si4O10)(OH)2 |
| 9.EC.10 | Luanshiweiite | KLiAl1.5(Si3.5Al0.5)O10(OH)2 |
| 9.EC.10 | Pyrophyllite | Al2Si4O10(OH)2 |
| 9.EC.15 | Paragonite | NaAl2(AlSi3O10)(OH)2 |
| 9.EC.15 | Ferroaluminoceladonite | K(Fe2+Al◻)(Si4O10)(OH)2 |
| 9.EC.15 | Nanpingite | CsAl2(AlSi3O10)(OH,F)2 |
| 9.EC.15 | Ferroceladonite | K(Fe2+Fe3+◻)(Si4O10)(OH)2 |
| 9.EC.15 | Ganterite | Ba0.5(Na,K)0.5Al2(Si2.5Al1.5)O10(OH)2 |
| 9.EC.15 | Kreiterite | CsLi2Fe3+(Si4O10)F2 |
| 9.EC.15 | Roscoelite | KV3+2(AlSi3O10)(OH)2 |
| 9.EC.15 | Aluminoceladonite | K(MgAl◻)(Si4O10)(OH)2 |
| 9.EC.15 | Tobelite | (NH4)Al2(AlSi3O10)(OH)2 |
| 9.EC.15 | Tainiolite | KLiMg2(Si4O10)F2 |
| 9.EC.15 | Celadonite | K(MgFe3+◻)(Si4O10)(OH)2 |
| 9.EC.15 | Chromceladonite | K(MgCr◻)(Si4O10)(OH)2 |
| 9.EC.15 | Montdorite | KFe2+1.5Mn2+0.5Mg0.5Si4O10(F,OH)2 |
| 9.EC.15 | Chromphyllite | KCr2(AlSi3O10)(OH)2 |
| 9.EC.15 | Boromuscovite | KAl2(BSi3O10)(OH)2 |
| 9.EC.15 | 'UM1988-22-SiO:AlCaFFeHKLiMg' | KLiMgAl2Si3O10F2 |
| 9.EC.15 | Chernykhite | (Ba,Na)(V3+,Al,Mg)2((Si,Al)4O10)(OH)2 |
| 9.EC.15 | Muscovite | KAl2(AlSi3O10)(OH)2 |
| 9.EC.20 | Masutomilite | K(LiAlMn2+)[AlSi3O10]F2 |
| 9.EC.20 | Oxyphlogopite | K(Mg,Ti,Fe)3[(Si,Al)4O10](O,F)2 |
| 9.EC.20 | 'Chloroferrokinoshitalite' | (Ba,K)(Fe2+,Mg)3(Al2Si2O10)(Cl,OH,F)2 |
| 9.EC.20 | Siderophyllite | KFe2+2Al(Al2Si2O10)(OH)2 |
| 9.EC.20 | Sokolovaite | CsLi2Al(Si4O10)F2 |
| 9.EC.20 | Hendricksite | KZn3(Si3Al)O10(OH)2 |
| 9.EC.20 | Tetraferriphlogopite | KMg3(Si3Fe3+)O10(OH)2 |
| 9.EC.20 | Fluorannite | KFe2+3(Si3Al)O10F2 |
| 9.EC.20 | Aspidolite | NaMg3(AlSi3O10)(OH)2 |
| 9.EC.20 | Suhailite | (NH4)Fe2+3(AlSi3O10)(OH)2 |
| 9.EC.20 | Ephesite | NaLiAl2(Al2Si2O10)(OH)2 |
| 9.EC.20 | Norrishite | KLiMn3+2(Si4O10)O2 |
| 9.EC.20 | Phlogopite | KMg3(AlSi3O10)(OH)2 |
| 9.EC.20 | Yangzhumingite | KMg2.5(Si4O10)F2 |
| 9.EC.20 | Orlovite | KLi2Ti(Si4O10)OF |
| 9.EC.20 | Tetraferriannite | KFe2+3(Si3Fe3+)O10(OH)2 |
| 9.EC.20 | Shirokshinite | K(NaMg2)(Si4O10)F2 |
| 9.EC.20 | Trilithionite | K(Li1.5Al1.5)(AlSi3O10)(F,OH)2 |
| 9.EC.20 | Polylithionite | KLi2Al(Si4O10)(F,OH)2 |
| 9.EC.20 | Shirozulite | KMn2+3(Si3Al)O10(OH)2 |
| 9.EC.20 | Preiswerkite | NaMg2Al(Al2Si2O10)(OH)2 |
| 9.EC.20 | Fluorophlogopite | KMg3(Si3Al)O10F2 |
| 9.EC.20 | Wonesite | (Na,K,◻)(Mg,Fe,Al)6(Si,Al)8O20(OH,F)4 |
| 9.EC.20 | 'UM2004-49-SiO:AlCsFHKLi' | (Cs,K)(Al,Li)2.6((Si,Al)4O10)(F,OH)2 |
| 9.EC.20 | Fluorotetraferriphlogopite | KMg3(Fe3+Si3O10)F2 |
| 9.EC.20 | Annite | KFe2+3(AlSi3O10)(OH)2 |
| 9.EC.20 | Eastonite | KMg2Al(Al2Si2O10)(OH)2 |
| 9.EC.22 | 'Pimelite' | Ni3Si4O10(OH)2 · 4H2O |
| 9.EC.30 | Margarite | CaAl2(Al2Si2O10)(OH)2 |
| 9.EC.35 | Kinoshitalite | (Ba,K)(Mg,Mn2+,Al)3(Al2Si2O10)(OH)2 |
| 9.EC.35 | Ferrokinoshitalite | (Ba,K)(Fe2+,Mg)3(Al2Si2O10)(OH,F)2 |
| 9.EC.35 | Clintonite | CaAlMg2(SiAl3O10)(OH)2 |
| 9.EC.35 | Oxykinoshitalite | (Ba,K)(Mg,Ti,Fe3+,Fe2+)3((Si,Al)4O10)(O,OH,F)2 |
| 9.EC.35 | Fluorokinoshitalite | BaMg3(Al2Si2O10)F2 |
| 9.EC.35 | Bityite | CaLiAl2(AlBeSi2O10)(OH)2 |
| 9.EC.35 | Anandite | (Ba,K)(Fe2+,Mg)3((Si,Al,Fe)4O10)(S,OH)2 |
| 9.EC.40 | Montmorillonite | (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O |
| 9.EC.40 | Beidellite | (Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2O |
| 9.EC.40 | Volkonskoite | Ca0.3(Cr,Mg,Fe)2((Si,Al)4O10)(OH)2 · 4H2O |
| 9.EC.40 | Nontronite | Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O |
| 9.EC.40 | Kurumsakite | (Zn,Ni,Cu)8Al8V5+2Si5O35 · 27H2O (?) |
| 9.EC.40 | Yakhontovite | (Ca,Na)0.5(Cu,Fe,Mg)2(Si4O10)(OH)2 · 3H2O |
| 9.EC.45 | Swinefordite | Li(Al,Li,Mg)3((Si,Al)4O10)2(OH,F)4 · nH2O |
| 9.EC.45 | Hectorite | Na0.3(Mg,Li)3(Si4O10)(F,OH)2 |
| 9.EC.45 | Zincsilite | Zn3Si4O10(OH)2 · 4H2O (?) |
| 9.EC.45 | Hanjiangite | Ba2CaV3+Al(H2AlSi3O12)(CO3)2F |
| 9.EC.45 | Spadaite | MgSiO2(OH)2 · H2O (?) |
| 9.EC.45 | Ferrosaponite | Ca0.3(Fe2+,Mg,Fe3+)3((Si,Al)4O10)(OH)2 · 4H2O |
| 9.EC.45 | Saponite | Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O |
| 9.EC.45 | Sauconite | Na0.3Zn3((Si,Al)4O10)(OH)2 · 4H2O |
| 9.EC.50 | Vermiculite | Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O |
| 9.EC.52 | 'Tarasovite' | near NaKAl11Si13O40(OH)9 · 3H2O |
| 9.EC.55 | Clinochlore | Mg5Al(AlSi3O10)(OH)8 |
| 9.EC.55 | Borocookeite | (LiAl4◻)[BSi3O10](OH)8 |
| 9.EC.55 | Franklinfurnaceite | Ca2Fe3+Mn2+3Mn3+(Zn2Si2O10)(OH)8 |
| 9.EC.55 | Pennantite | Mn2+5Al(AlSi3O10)(OH)8 |
| 9.EC.55 | Vakhrushevaite | Mg5Cr(AlSi3O10)(OH)8 |
| 9.EC.55 | Nimite | Ni5Al(AlSi3O10)(OH)8 |
| 9.EC.55 | Cookeite | (LiAl4◻)[AlSi3O10](OH)8 |
| 9.EC.55 | Gonyerite | Mn2+5Fe3+(Fe3+Si3O10)(OH)8 |
| 9.EC.55 | Chamosite | Fe2+5Al(AlSi3O10)(OH)8 |
| 9.EC.55 | 'Orthochamosite' | (Fe2+,Mg,Fe3+)5Al(AlSi3O10)(OH,O)8 |
| 9.EC.55 | Baileychlore | Zn5Al(AlSi3O10)(OH)8 |
| 9.EC.55 | Sudoite | Mg2Al3(AlSi3O10)(OH)8 |
| 9.EC.55 | Glagolevite | Na(Mg,Al)6(AlSi3O10)(OH,O)8 |
| 9.EC.55 | Donbassite | Al4.33(AlSi3O10)(OH)8 |
| 9.EC.60 | Dozyite | Mg7Al2(Al2Si4O15)(OH)12 |
| 9.EC.60 | Rectorite | (Na,Ca)Al4((Si,Al)8O20)(OH)4 · 2H2O |
| 9.EC.60 | Corrensite | (Mg,Fe)9((Si,Al)8O20)(OH)10 · nH2O |
| 9.EC.60 | Aliettite | Ca0.2Mg6((Si,Al)8O20)(OH)4 · 4H2O |
| 9.EC.60 | Karpinskite | (Ni,Mg)2Si2O5(OH)2 (?) |
| 9.EC.60 | Lunijianlaite | Li0.7Al6.2(AlSi7O20)(OH,O)10 |
| 9.EC.60 | Tosudite | Na0.5(Al,Mg)6((Si,Al)8O18)(OH)12 · 5H2O |
| 9.EC.60 | Hydrobiotite | K(Mg,Fe2+)6((Si,Al)8O20)(OH)4 · nH2O |
| 9.EC.60 | Saliotite | (Li,Na)Al3(AlSi3O10)(OH)5 |
| 9.EC.60 | Kulkeite | Mg8Al(AlSi7O20)(OH)10 |
| 9.EC.60 | Brinrobertsite | Na0.3Al4(Si4O10)2(OH)4 · 3.5 H2O |
| 9.EC.65 | Macaulayite | (Fe,Al)24Si4O43(OH)2 |
| 9.EC.70 | Burckhardtite | Pb2(Fe3+Te6+)[AlSi3O8]O6 |
| 9.EC.75 | Niksergievite | (Ba,Ca)2Al3(AlSi3O10)(CO3)(OH)6 · nH2O |
| 9.EC.75 | Ferrisurite | (Pb,Ca)2.4Fe3+2(Si4O10)(CO3)1.7(OH)3 · nH2O |
| 9.EC.75 | Surite | (Pb,Ca)3(Al,Fe2+,Mg)2((Si,Al)4O10)(CO3)2(OH)2 |
| 9.EC.80 | Kegelite | Pb8Al4(Si8O20)(SO4)2(CO3)4(OH)8 |
Fluorescence of Stevensite
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.
Internet Links for Stevensite
mindat.org URL:
https://www.mindat.org/min-3770.html
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References for Stevensite
Reference List:
Faust, George T., Murata, K. J. (1953) Stevensite, redefined as a member of the montmorillonite group. American Mineralogist, 38 (11-12) 973-987
Faust, G. T., Hathaway, J. C., Millot, G. (1959) A restudy of stevensite and allied minerals. American Mineralogist, 44 (3-4) 342-370
Bradley, W.H.; Fahey, Jos. J. (1962) Occurrence of stevensite in the Green River formation of Wyoming. American Mineralogist, 47 (7-8). p.996-997.
DeRudder, Ronald D. (1962) Stevensite and Talc—Hydrothermal Alteration Products of Wollastonite. Clays and Clay Minerals, 11 (1) 188-199 doi:10.1346/ccmn.1962.0110117
Localities for Stevensite
Showing 79 localities.
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Australia | |
| Steve Sorrell Collection |
| www.crocoite.com (2003) |
| Bottrill et al. (2002) |
Austria | |
| Zirkl (1985) +1 other reference |
Bolivia | |
| Bougeault et al. (2019) |
Canada | |
| GSC collection specimen |
Ethiopia | |
| López-García et al. (2020) |
Germany | |
| Sehrig (2007) |
Hungary | |
| Szakáll: Minerals of Szár Hill |
Italy | |
| Balestra et al. (2020) |
| IVM Magazine - Bulletin of the ... +1 other reference |
| Fabio Tosato et al. (2024) |
Japan | |
| SAKAMOTO et al. (1975) |
| Yamada (2004) |
| ... |
| Otsu et al. (1963) |
| ... | |
Morocco | |
| MINERALOGICAL AND PHYSICOCHEMICAL ... +5 other references |
Namibia | |
| Buch et al. (1996) |
Norway | |
| Bancroft et al. (2001) |
Pacific Ocean | |
| Tuomo Törmänen (2005) |
Poland | |
| Harańczyk C. (1974) +1 other reference |
| ... |
| ... | |
Romania | |
| www.minerals-of-the-carpathians +2 other references |
Russia | |
| webmineral.ru (2020) |
| Nimis et al. (2004) |
| Sorokhtina et al. (2008) |
Slovakia | |
| Uher et al. (2010) |
South Africa | |
| Cairncross et al. (1995) |
South America Plate | |
| Zhang et al. (2026) | |
| Silva et al. (2025) | |
| Schrank et al. (2024) | |
Sweden | |
| Holtstam et al. (1999) |
| |
Tajikistan | |
| Xinjiang Tacheng International Resources Ltd. |
UK | |
| Golley et al. (1995) |
| Golley et al. (1995) |
| [Specimen in the Natural History Museum +2 other references |
| ... |
| National Museum of Wales collection |
USA | |
| Anthony et al. (1995) |
| Anthony et al. (1995) |
| Anthony et al. (1995) |
| Howard (1987) |
| Cooper et al. (2003) |
| www.benitoitemine.com |
| AmMin 47:996 +3 other references | |
| Anderson |
| King et al. (1994) | |
| Clays and Clay Minerals |
| Castor et al. (2004) |
| Focus on Fort Lee - A Key and Guide to ... +1 other reference |
| AmMin 44:342 (1959) |
| Manchester (1931) |
| Manchester (1931) |
| Manchester (1931) |
| Bradley Plotkin Collection |
| Minerals of Laurel Hill et al. (published privately) |
| Mins. of NYC & Its Environs (1931) +1 other reference |
| |
| Amer. Museum of Nat. History +1 other reference | |
| American Museum of Nat. History +1 other reference | |
| Vitali (1978) +1 other reference |
| Rocks & Min.:13:75-79. |
| Rocks & Min.:13:75-79. | |
| Manchester (1931) | |
| Clays and Clay Minerals +4 other references |
| Northrop et al. (1996) |
| Jensen (1978) |
| DeRudder & Beck 11th National ... | |
| Collected by Steve Okulewicz |
| The American Mineralogist Vol.44 +1 other reference |
| Vandall King |
| gsa.confex.com (n.d.) |
| Dietrich (1990) |
| Hawley (1934) |
| Bradley et al. (1962) |
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