Kyanite
A valid IMA mineral species - grandfathered
This page kindly sponsored by Donald Seccombe IV
About Kyanite
Formula:
Al2(SiO4)O
Colour:
Blue, white, light gray, green, rarely yellow, orange, pink
Lustre:
Vitreous, Sub-Vitreous, Greasy, Pearly
Hardness:
5½ - 7
Specific Gravity:
3.53 - 3.67
Crystal System:
Triclinic
Name:
Named in 1789 by Abraham Gottlob Werner from the Greek word "kyanos", meaning "blue," the common colour of the species. The French spelling, "Cyanite", was commonly used by mineralogists through much of the 19th and early 20th centuries.
Polymorph of:
Common metamorphic silicate mineral.
The generally bluish colour is caused by Fe(II)-Fe(III) charge transfer (Faye and Nickel, 1969).
Visit gemdat.org for gemological information about Kyanite.
The generally bluish colour is caused by Fe(II)-Fe(III) charge transfer (Faye and Nickel, 1969).
Visit gemdat.org for gemological information about Kyanite.Unique Identifiers
Mindat ID:
2303
Long-form identifier:
mindat:1:1:2303:6
Similar Names
| Cuyunite | A synonym of 'Binghamite' | |
| Guyanaite | A valid IMA mineral species | CrO(OH) |
| Kainite | A valid IMA mineral species - grandfathered | KMg(SO4)Cl · 3H2O |
IMA Classification of Kyanite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Al2OSiO4
Classification of Kyanite
9.AF.15
9 : SILICATES (Germanates)
A : Nesosilicates
F : Nesosilicates with additional anions; cations in [4], [5] and/or only [6] coordination
9 : SILICATES (Germanates)
A : Nesosilicates
F : Nesosilicates with additional anions; cations in [4], [5] and/or only [6] coordination
52.2.2c.1
52 : NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
2 : Insular SiO4 Groups and O, OH, F, and H2O with cations in [4] and >[4] coordination
52 : NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
2 : Insular SiO4 Groups and O, OH, F, and H2O with cations in [4] and >[4] coordination
15.2
15 : Silicates of Aluminum
15 : Silicates of Aluminum
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 |
|---|---|---|
| Ky | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Ky | Kretz (1983) | Kretz, R. (1983) Symbols of rock-forming minerals. American Mineralogist, 68, 277–279. |
| Ky | Siivolam & Schmid (2007) | Siivolam, J. and Schmid, R. (2007) Recommendations by the IUGS Subcommission on the Systematics of Metamorphic Rocks: List of mineral abbreviations. Web-version 01.02.07. IUGS Commission on the Systematics in Petrology. download |
| Ky | 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 |
| Ky | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Physical Properties of Kyanite
Vitreous, Sub-Vitreous, Greasy, Pearly
Transparency:
Transparent, Translucent
Comment:
Somewhat pearly on {100} || to the perfect cleavage
Colour:
Blue, white, light gray, green, rarely yellow, orange, pink
Comment:
The chroma C* of blue kyanite is predominantly influenced by variations in the color coordinate b*. Based on the analysis of ED-XRF and UV–Vis results, Fe3+, Fe2+, and Ti4+ are confirmed as the primary factors influencing the color of kyanite, with Fe playing a dominant role in determining the color. The hue angle h° and chroma C* of kyanite were found to be strongly positively correlated with the Fe content, whereas the color coordinate b* exhibited a strong negative correlation with the Fe content. An increase in the Fe content led to a rise in the hue angle, which subsequently caused a shift towards a more pronounced blue hue. Additionally, the lightness L* exhibited a negative correlation with Ti content; as the Ti content increased, the lightness decreased, resulting in a darker appearance. Moreover, the influence of Cr on the body color of kyanite cannot be ignored. The UV–Vis spectra of the kyanite samples reveal a prominent absorption band at approximately 600 nm, attributed to Fe3+ and Ti4+. The wavelength corresponding to the first peak significantly correlates with the lightness L* of natural samples; as the wavelength increases, so does the lightness, resulting in a brighter body color. Additionally, an increase in the Fe content leads to a more pronounced absorption peak at 600 nm and is significantly positively correlated with an increase in the hue angle.
Orange colour is caused by Mn3+ ions (Gaft et al., 2011).
Orange colour is caused by Mn3+ ions (Gaft et al., 2011).
Streak:
Colorless
Hardness:
5½ - 7 on Mohs scale
Comment:
5.5 parallel to [001], 7 parallel to [100]
Tenacity:
Brittle
Cleavage:
Perfect
Perfect on (100), good on (010)
Perfect on (100), good on (010)
Parting:
On (001)
Fracture:
Splintery
Density:
3.53 - 3.67 g/cm3 (Measured) 3.67 g/cm3 (Calculated)
Optical Data of Kyanite
Type:
Biaxial (-)
RI values:
nα = 1.712 - 1.718 nβ = 1.720 - 1.725 nγ = 1.727 - 1.734
2V:
Measured: 82° to 83°, Calculated: 84°
Birefringence:
0.015
Max. Birefringence:
δ = 0.015 - 0.016
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:
Very High (positive)
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.
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.
Dispersion:
r > v weak
Optical Extinction:
Inclined. Z>Y>X; X perpendicular to {100}, Z' ∧ c = 30° on {100}, Z' ∧ c = 7° on {010}.
Pleochroism:
Not Visible
Comments:
Pleochroism is not usually observed in kyanite of standard thickness. However, in thick sections, the pleochroism scheme may be:
X= colorless
Y= violet-blue
Z= cobalt blue
X= colorless
Y= violet-blue
Z= cobalt blue
Chemistry of Kyanite
Mindat Formula:
Al2(SiO4)O
Element Weights:
Elements listed:
Crystallography of Kyanite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Setting:
P1
Cell Parameters:
a = 7.1262(12) Å, b = 7.8520(10) Å, c = 5.5724(10) Å
α = 89.99(2)°, β = 101.11(2)°, γ = 106.03(1)°
α = 89.99(2)°, β = 101.11(2)°, γ = 106.03(1)°
Ratio:
a:b:c = 0.908 : 1 : 0.71
Unit Cell V:
293.60 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Crystals bladed or tabular.
Twinning:
Lamellar on (100), common
Comment:
Non-standard setting.
Crystallographic forms of Kyanite
Crystal Atlas:
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0000733 | Kyanite | Winter J K, Ghose S (1979) Thermal expansion and high-temperature crystal chemistry of the Al2SiO5 polymorphs American Mineralogist 64 573-586 | ![]() | 1979 | 0 | 298 | |
| 0001892 | Kyanite | Yang H, Downs R T, Finger L W, Hazen R M, Prewitt C T (1997) Compressibility and crystal structure of kyanite, Al2SiO5, at high pressure American Mineralogist 82 467-474 | ![]() | 1997 | 0 | 293 | |
| 0001887 | Kyanite | Comodi P, Zanazzi P F, Poli S, Schmidt M W (1997) High-pressure behavior of kyanite: Compressibility and structural deformation American Mineralogist 82 452-459 | ![]() | 1997 | 0.0001 | 293 | |
| 0016636 | Kyanite | de Rango C, Tsoucaris G, Zelwer C, Devaux J (1966) Comparaison de deux affinements de la structure de la cyanite _cod_database_code 1008759 Bulletin de la Societe Francaise de Mineralogie et de Cristallographie 89 419-424 | 1966 | 0 | 293 | ||
| 0016632 | Kyanite | de Rango C, Tsoucaris G, Zelwer C, Devaux J (1966) Comparaison de deux affinements de la structure de la cyanite _cod_database_code 1008755 Bulletin de la Societe Francaise de Mineralogie et de Cristallographie 89 419-424 | 1966 | 0 | 293 | ||
| 0017903 | Kyanite | Naray-Szabo S, Taylor W, Jackson W (1929) The Structure of Cyanite _cod_database_code 1010987 Zeitschrift fur Kristallographie 71 117-130 | 1929 | 0 | 293 | ||
| 0017255 | Kyanite | Taylor W, Jackson W (1928) The structure of cyanite, Al2SiO5 _cod_database_code 1010329 Proceedings of the Royal Society of London 119 132-146 | 1928 | 0 | 293 | ||
| 0000734 | Kyanite | Winter J K, Ghose S (1979) Thermal expansion and high-temperature crystal chemistry of the Al2SiO5 polymorphs American Mineralogist 64 573-586 | ![]() | 1979 | 0 | 673 | |
| 0000735 | Kyanite | Winter J K, Ghose S (1979) Thermal expansion and high-temperature crystal chemistry of the Al2SiO5 polymorphs American Mineralogist 64 573-586 | ![]() | 1979 | 0 | 873 | |
| 0001888 | Kyanite | Comodi P, Zanazzi P F, Poli S, Schmidt M W (1997) High-pressure behavior of kyanite: Compressibility and structural deformation American Mineralogist 82 452-459 | ![]() | 1997 | 0.01 | 293 | |
| 0001893 | Kyanite | Yang H, Downs R T, Finger L W, Hazen R M, Prewitt C T (1997) Compressibility and crystal structure of kyanite, Al2SiO5, at high pressure American Mineralogist 82 467-474 | ![]() | 1997 | 1.35 | 293 | |
| 0001894 | Kyanite | Yang H, Downs R T, Finger L W, Hazen R M, Prewitt C T (1997) Compressibility and crystal structure of kyanite, Al2SiO5, at high pressure American Mineralogist 82 467-474 | ![]() | 1997 | 2.54 | 293 | |
| 0001889 | Kyanite | Comodi P, Zanazzi P F, Poli S, Schmidt M W (1997) High-pressure behavior of kyanite: Compressibility and structural deformation American Mineralogist 82 452-459 | ![]() | 1997 | 2.54 | 293 | |
| 0001890 | Kyanite | Comodi P, Zanazzi P F, Poli S, Schmidt M W (1997) High-pressure behavior of kyanite: Compressibility and structural deformation American Mineralogist 82 452-459 | ![]() | 1997 | 3.7 | 293 | |
| 0001895 | Kyanite | Yang H, Downs R T, Finger L W, Hazen R M, Prewitt C T (1997) Compressibility and crystal structure of kyanite, Al2SiO5, at high pressure American Mineralogist 82 467-474 | ![]() | 1997 | 3.73 | 293 | |
| 0001896 | Kyanite | Yang H, Downs R T, Finger L W, Hazen R M, Prewitt C T (1997) Compressibility and crystal structure of kyanite, Al2SiO5, at high pressure American Mineralogist 82 467-474 | ![]() | 1997 | 4.56 | 293 | |
| 0001891 | Kyanite | Comodi P, Zanazzi P F, Poli S, Schmidt M W (1997) High-pressure behavior of kyanite: Compressibility and structural deformation American Mineralogist 82 452-459 | ![]() | 1997 | 4.7 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Loading XRD data...
Data courtesy of RRUFF project at University of Arizona, used with permission.
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 6.7 Å | (3) |
| 5.89 Å | (3) |
| 4.42 Å | (5) |
| 4.30 Å | (25) |
| 3.77 Å | (20) |
| 3.44 Å | (5) |
| 3.35 Å | (65) |
| 3.18 Å | (100) |
| 3.02 Å | (15) |
| 2.947 Å | (20) |
| 2.782 Å | (1) |
| 2.727 Å | (9) |
| 2.699 Å | (25) |
| 2.694 Å | (25) |
| 2.612 Å | (7) |
| 2.602 Å | (3) |
| 2.520 Å | (30) |
| 2.509 Å | (20) |
| 2.460 Å | (5) |
| 2.366 Å | (1) |
| 2.361 Å | (1) |
| 2.355 Å | (30) |
| 2.350 Å | (30) |
| 2.31 Å | (20) |
| 2.272 Å | (11) |
| 2.233 Å | (9) |
| 2.214 Å | (15) |
| 2.181 Å | (7) |
| 2.168 Å | (5) |
| 2.163 Å | (20) |
| 2.151 Å | (3) |
| 2.006 Å | (7) |
| 1.973 Å | (3) |
| 1.962 Å | (55) |
| 1.935 Å | (50) |
| 1.930 Å | (50) |
| 1.883 Å | (5) |
| 1.865 Å | (3) |
| 1.846 Å | (3) |
| 1.820 Å | (1) |
| 1.791 Å | (1) |
| 1.764 Å | (11) |
| 1.754 Å | (1) |
| 1.747 Å | (3) |
| 1.676 Å | (9) |
| 1.650 Å | (3) |
| 1.621 Å | (7) |
| 1.606 Å | (3) |
| 1.593 Å | (20) |
| 1.573 Å | (3) |
Comments:
ICDD 11-46, See also ICDD 11-46a major lines at 1.475 (15), 1.392 (25), and 1.377 (75).
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 26 : Hadean detrital minerals | |
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 36 : Carbonatites, kimberlites, and related igneous rocks | |
| Stage 5: Initiation of plate tectonics | <3.5-2.5 |
| 39 : High-? metamorphism (blueschist, eclogite, ultrahigh ? facies) | |
| 40 : Regional metamorphism (greenschist, amphibolite, granulite facies) |
Geological Setting:
Metamorphic rocks of moderately high-pressure regional metamorphism.
Synonyms of Kyanite
Other Language Names for Kyanite
Varieties of Kyanite
| Chrome-Kyanite | A Cr-bearing kyanite. Contains up to 17 wt.% Cr2O3, this highest value reported for the Slovenia material. |
| Rhätizite | A black-grey variety of kyanite. The colour is caused by graphite inclusions. |
Common Associates
Associations Based on Photo Data:
| 448 photos of Kyanite associated with Quartz | SiO2 |
| 118 photos of Kyanite associated with Muscovite | KAl2(AlSi3O10)(OH)2 |
| 111 photos of Kyanite associated with Staurolite | Fe2+2Al9Si4O23(OH) |
| 60 photos of Kyanite associated with Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| 56 photos of Kyanite associated with Rutile | TiO2 |
| 55 photos of Kyanite associated with Andalusite | Al2(SiO4)O |
| 53 photos of Kyanite associated with Almandine | Fe2+3Al2(SiO4)3 |
| 39 photos of Kyanite associated with Garnet Group | X3Z2(SiO4)3 |
| 36 photos of Kyanite associated with Corundum | Al2O3 |
| 34 photos of Kyanite associated with Pyrite | FeS2 |
Related Minerals - Strunz-mindat Grouping
| 9.AF. | Chegemite | Ca7(SiO4)3(OH)2 |
| 9.AF. | Jingwenite-(Y) | YAlV4+(SiO4)O2(OH)2 |
| 9.AF. | Barwoodite | Mn2+6Nb5+(SiO4)2O3(OH)3 |
| 9.AF.05 | Sillimanite | Al2(SiO4)O |
| 9.AF.05 | 'Xenolite' | Al10Si8O31 |
| 9.AF.10 | Kanonaite | Mn3+Al(SiO4)O |
| 9.AF.10 | Andalusite | Al2(SiO4)O |
| 9.AF.20 | Krieselite | Al2(GeO4)F2 |
| 9.AF.20 | Mullite | Al4+2xSi2-2xO10-x |
| 9.AF.23 | Boromullite | Al9BSi2O19 |
| 9.AF.25 | Yoderite | Mg(Al,Fe3+)3(SiO4)2O(OH) |
| 9.AF.30 | Zincostaurolite | Zn2Al9Si4O23(OH) |
| 9.AF.30 | Staurolite | Fe2+2Al9Si4O23(OH) |
| 9.AF.30 | Magnesiostaurolite | Mg(Mg,Li)3(Al,Mg)18Si8O44(OH)4 |
| 9.AF.35 | Topaz | Al2(SiO4)(F,OH)2 |
| 9.AF.40 | Norbergite | Mg3(SiO4)F2 |
| 9.AF.45 | Chondrodite | Mg5(SiO4)2F2 |
| 9.AF.45 | Kumtyubeite | Ca5(SiO4)2F2 |
| 9.AF.45 | Reinhardbraunsite | Ca5(SiO4)2(OH,F)2 |
| 9.AF.45 | Hydroxylchondrodite | Mg5(SiO4)2(OH)2 |
| 9.AF.45 | Alleghanyite | Mn2+5(SiO4)2(OH)2 |
| 9.AF.50 | 'Unnamed (Ca-analogue of Humite)' | Ca7(SiO4)4F2 |
| 9.AF.50 | Humite | Mg7(SiO4)3F2 |
| 9.AF.50 | Manganhumite | Mn2+7(SiO4)3(OH)2 |
| 9.AF.50 | 'Unnamed (OH-analogue of humite)' | Mg7(SiO4)3(OH)2 |
| 9.AF.50 | Fluorchegemite | Ca7(SiO4)3F2 |
| 9.AF.55 | Hydroxylclinohumite | Mg9(SiO4)4(OH)2 |
| 9.AF.55 | Clinohumite | Mg9(SiO4)4F2 |
| 9.AF.55 | Sonolite | Mn2+9(SiO4)4(OH)2 |
| 9.AF.60 | Leucophoenicite | Mn2+7(SiO4)3(OH)2 |
| 9.AF.65 | Ribbeite | Mn2+5(SiO4)2(OH)2 |
| 9.AF.70 | Jerrygibbsite | Mn2+9(SiO4)4(OH)2 |
| 9.AF.75 | Franciscanite | Mn2+6(V5+,◻)2(SiO4)2(O,OH)6 |
| 9.AF.75 | Scorticoite | Mn6(Sb,◻)Σ2(SiO4)2O3(OH)3 |
| 9.AF.75 | Welinite | Mn2+6(W6+,Mg)2(SiO4)2(O,OH)6 |
| 9.AF.75 | Örebroite | Mn2+3(Sb5+,Fe3+)(SiO4)(O,OH)3 |
| 9.AF.80 | Ellenbergerite | Mg6(Mg,Ti,Zr,◻)2(Al,Mg)6Si8O28(OH)10 |
| 9.AF.85 | Magnesiochloritoid | MgAl2O(SiO4)(OH)2 |
| 9.AF.85 | Ottrélite | Mn2+Al2O(SiO4)(OH)2 |
| 9.AF.85 | Chloritoid | Fe2+Al2O(SiO4)(OH)2 |
| 9.AF.90 | Olmiite | CaMn2+[SiO3(OH)](OH) |
| 9.AF.90 | Poldervaartite | CaCa[SiO3(OH)](OH) |
| 9.AF.95 | Pilawite-(Y) | Ca2Y2Al4(SiO4)4O2(OH)2 |
Fluorescence of Kyanite
Not usually fluorescent. Weak pink-red fluorescence under longwave reported at Thomaston Dam, Connecticut (Don Swenson, pers. com., 2017). Robbins (1994) indicated that: "From Pfitsch in the Tyrol, Austria, colorless blades of kyanite fluoresce yellow under short-wave and orange under long-wave ultraviolet. From research done some years ago on certain kyanite from this locality, and also on kyanite from the Transvaal in South Africa, red fluorescence is reported. The fluorescence is due to trivalent chromium in place of aluminum."
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.
Industrial Uses:
Ceramics
Kyanite in petrology
An essential component of rock names highlighted in red, an accessory component in rock names highlighted in green.
Internet Links for Kyanite
mindat.org URL:
https://www.mindat.org/min-2303.html
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References for Kyanite
Reference List:
Clark, S. P., Robertson, E. C., Birch, A. F. (1957) Experimental determination of kyanite-sillimanite equilibrium relations at high temperatures and pressures. American Journal of Science, 255 (9) 628-640 doi:10.2475/ajs.255.9.628
Pearson, G. R., Shaw, D. M. (1960) Trace elements in kyanite, sillimanite and andalusite. American Mineralogist, 45 (7-8) 808-817
Burnham, Charles W. (1963) Refinement of the crystal structure of kyanite. Zeitschrift für Kristallographie - Crystalline Materials, 118 (5) 337-360 doi:10.1524/zkri.1963.118.5-6.337
Chinner, G.A. (1966) The significance of the aluminium silicates in metamorphism. Earth-Science Reviews, 2. 111-126 doi:10.1016/0012-8252(66)90025-0
Holm, J. L.; Kleppa, O. J. (1966) The Enthalpy of Formation of Kyanite (Al2SiO5). Inorganic Chemistry, 5 (4). 698 doi:10.1021/ic50038a047
Hafner, Stefan, Raymond, Michael (1967) The nuclear quadrupole coupling tensors of Al27 in kyanite. American Mineralogist, 52 (11-12) 1632-1642
White, E. W., White, W. B. (1967) Electron Microprobe and Optical Absorption Study of Colored Kyanites. Science, 158 (3803). 915-917 doi:10.1126/science.158.3803.915
Althaus, Egon (1967) Experimentelle Bestimmung des Stabilitätsbereichs von Disthen (Cyanit). Die Naturwissenschaften, 54 (2). 42-43 doi:10.1007/bf00680167
Althaus, Egon (1967) The triple point andalusite - sillimanite - kyanite. Contributions to Mineralogy and Petrology, 16 (1) 29-44 doi:10.1007/bf00371606
Fyfe, W.S. (1967) Stability of Al2SiO5 polymorphs. Chemical Geology, 2. 67-76 doi:10.1016/0009-2541(67)90005-8
Chinner, G. A.; Smith, J. V.; Knowles, C. R. (1969) Transition Metal Contents of Al2SiO5 Polymorphs. American Journal Of Science, 267-A. doi:10.2475/001c.125212
Faye, G. H., Nickel, E. H. (1969) On the origin of colour and pleochroism of kyanite. The Canadian Mineralogist, 10 (1) 35-46
Abs-Wurmbach, I.; Langer, K. (1975) Synthetic Mn3+-kyanite and viridine, (Al2-xMnx3+)SiO5, in the system Al2O3-MnO-MnO2-SiO2. Contributions to Mineralogy and Petrology, 49 (1). p.21-38. doi:10.1007/bf00371076
Winter, John K., Ghose, Subrata (1979) Thermal expansion and high-temperature crystal chemistry of the Al2SiO5 polymorphs. American Mineralogist, 64 (5-6) 573-586
Wojtowicz, A.J., Lempicki, A. (1990) Cr3+ in kyanite: A new mechanism of thermally enhanced 2E decay. Journal of Luminescence, 46 (4) 271-276 doi:10.1016/0022-2313(90)90023-5
Wojtowicz, A.J. (1991) Luminescence of Cr3+ in kyanite. Journal of Luminescence, 50 (4) 221-230 doi:10.1016/0022-2313(91)90046-x
Ibarguchi, Jose I. Gil, Mendia, Miren, Girardeau, Jacques (1991) Mg- and Cr-rich staurolite and Cr-rich kyanite in high-pressure ultrabasic rocks (Cabo Ortegal, northwestern Spain) American Mineralogist, 76 (3-4) 501-511
Schmidt, Max W., Poli, Stefano, Comodi, Paola, Zanazzi, Pier Francesco (1997) High-pressure behavior of kyanite: decomposition of kyanite into stishovite and corundum. American Mineralogist, 82 (5) 460-466 doi:10.2138/am-1997-5-603
Yang, Hexiong, Downs, Robert T., Finger, Larry W., Hazen, Robert M., Prewitt, Charles T. (1997) Compressibility and crystal structure of kyanite, Al2SiO5, at high pressure. American Mineralogist, 82 (5) 467-474 doi:10.2138/am-1997-5-604
Rao, Mala N.; Chaplot, S. L.; Choudhury, Narayani; Rao, K. R.; Azuah, R. T.; Montfrooij, W. T.; Bennington, S. M. (1999) Lattice dynamics and inelastic neutron scattering from sillimanite and kyanite Al2SiO5. Physical Review B, 60 (17). p.12061-12068. doi:10.1103/physrevb.60.12061
Dahaoui, Slimane, Ghermani, Nour Eddine, Ghose, Subrata, Howard, Judith A.K. (2001) Electric field gradient tensors at the aluminum sites in the Al2SiO5 polymorphs from CCD high-resolution X-ray diffraction data: Comparison with 27Al NMR results. American Mineralogist, 86 (1-2). 159-164 doi:10.2138/am-2001-0117
Iglesias, M., Schwarz, K., Blaha, P., Baldomir, D. (2001) Electronic structure and electric field gradient calculations of Al2SiO5 polymorphs. Physics and Chemistry of Minerals, 28 (1). 67-75 doi:10.1007/s002690000123
Winkler, Björn, Hytha, M., Warren, M. C., Milman, Victor, Gale, J. D., Schreuer, J. (2001) Calculation of the elastic constants of the Al2SiO5 polymorphs andalusite, sillimanite and kyanite. Zeitschrift für Kristallographie, 216 (2). 67-70 doi:10.1524/zkri.216.2.67.20336
Whitney, Donna L. (2002) Coexisting andalusite, kyanite, and sillimanite: Sequential formation of three Al2SiO5 polymorphs during progressive metamorphism near the triple point, Sivrihisar, Turkey. American Mineralogist, 87 (4). 405-416 doi:10.2138/am-2002-0404
Bell, David R., Rossman, George R., Maldener, Joachim, Endisch, Denis, Rauch, Friedel (2004) Hydroxide in kyanite: A quantitative determination of the absolute amount and calibration of the IR spectrum. American Mineralogist, 89 (7) 998-1003 doi:10.2138/am-2004-0710
Friedrich, Alexandra, Kunz, Martin, Winkler, Björn, Le Bihan, Tristan (2004) High-pressure behavior of sillimanite and kyanite: Compressibility, decomposition and indications of a new high-pressure phase. Zeitschrift für Kristallographie, 219 (6). 324-329 doi:10.1524/zkri.219.6.324.34635
Ohuchi, F. S. (2006) Chemical bonding and electronic structures of the Al2SiO5 polymorphs, andalusite, sillimanite, and kyanite: X-ray photoelectron- and electron energy loss spectroscopy studies. American Mineralogist, 91 (5) 740-746 doi:10.2138/am.2006.1887
Gaft, M.; Nagli, L.; Panczer, G.; Rossman, G.R.; Reisfeld, R. (2011) Laser-induced time-resolved luminescence of orange kyanite Al2SiO5. Optical Materials, 33 (10). 1476-1480 doi:10.1016/j.optmat.2011.03.052
Richards, R. Peter, White, John S., Leavens, Peter B. (2012) A Re-discovered Twin Law in Kyanite from Africa. Rocks & Minerals, 87 (2) 162-167 doi:10.1080/00357529.2011.618781
Localities for Kyanite
Showing 1,948 localities.
Locality List
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All localities listed without proper references should be considered as questionable.
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Central St Gotthard Massif, Leventina, Ticino, Switzerland