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Katoite

A valid IMA mineral species

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Photos of Katoite (21)

Katoite Gallery Search Photos of Katoite

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Katoite

Caspar quarry, Ettringen, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany

Katoite

Campomorto Quarry, Pietra Massa Locality, Montalto di Castro, Viterbo Province, Lazio, Italy

Katoite

Caspar quarry, Ettringen, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany

Katoite

Caspar quarry, Ettringen, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany

Katoite

Campomorto Quarry, Pietra Massa Locality, Montalto di Castro, Viterbo Province, Lazio, Italy

Katoite

Caspar quarry, Ettringen, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany

Katoite

Caspar quarry, Ettringen, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany

Katoite

Campomorto Quarry, Pietra Massa Locality, Montalto di Castro, Viterbo Province, Lazio, Italy

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About KatoiteHide

Formula:

Ca₃Al₂[◻(OH)₄]₃

The formula for general "hydrogrossular" is derived by the progressive exchange of grossular's Si with vacancies (◻), while maintaining local charge balance by attaching one H⁺ to each of the four adjacent oxygens (so 4H⁺ in total) per each one Si⁴⁺ lost. This progressive exchange can also be represented as Ca₃Al₂(SiO₄)_3-x(OH)_4x. In end-member katoite, the replacement is complete (so x = 3).

Previously, the mineral "hibschite" (no longer an IMA-approved species) was considered an intermediate member of the grossular-katoite series, and was defined as Ca₃Al₂(SiO₄)_3-x(OH)_4x, where x = 0.2-1.5; compositions where x < 0.2 were still considered grossular, whereas compositions where x > 1.5 were considered katoite. Now, based on the modern "50% rule", what was previously called "hibschite" would now be considered grossular (or perhaps more descriptively as "OH-bearing grossular"), although "hibschite", "hydrogrossular" and "hydrogarnet" are still all informally in common use.

Colour:

Colourless

Lustre:

Vitreous

Hardness:

5 - 6

Specific Gravity:

3.013 (Calculated)

Crystal System:

Isometric

Member of:

Garnet Supergroup

Name:

Named in 1984 by E. Passaglia and R. Rinaldi in honor of Akira Kato (加藤昭) (b. 19 June 1931, Tokyo prefecture, Japan), Department of Geology, National Science Museum, Ueno, Tokyo, Japan. Former president of the International Mineralogical Association. In addition to his academic positions, Dr Kato was the founder of one of the most active Tokyo clubs for mineral collectors and amateur mineralogists and he was always willing to help amateurs with their studies.

Type Locality:

ⓘ Campomorto Quarry, Pietra Massa Locality, Montalto di Castro, Viterbo Province, Lazio, Italy

Grossular-Katoite Series. Compare also the tetragonal-pseudocubic Holtstamite.
Ungrouped member of the Garnet Supergroup.

For x = 3, i.e. the end member, the species is also known as C3AH6 ("Tricalcium aluminate hydrate") in hydrated cement.
See also hydrogarnet.

Note that the "hydrogarnet" exchange is not limited to only grossular-rich garnets, and has also been observed involving andradite ("hydro-andradite") and sometimes uvarovite ("hydro-uvarovite") as well. A related exchange, where Si is also replaced by vacancies but the local charge balance is instead maintained by replacing the four adjacent oxygen by fluorine, is particularly notable in some igneous spessartine-rich garnets ("fluor-spessartine"), but occurs in other garnet varieties as well; mixed exchanges (e.g. "fluor-hydro-andradite") are also known.

Katoite from Tadano bears both hexa- and tetravalent sulfur.

Unique IdentifiersHide

Mindat ID:

2167

Long-form identifier:

mindat:1:1:2167:4

GUID
(UUID V4):

40b4f0fb-5606-4003-9e65-86689c0ab3c5

IMA Classification of KatoiteHide

IMA status:

Approved

IMA Formula:

Ca₃Al₂(OH)₁₂

Approval year:

1982

Classification of KatoiteHide

Strunz-mindat (2024):

4.FF.

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
F : Hydroxides with OH, without H₂O; various polyhedra

Dana 8th ed.:

51.4.3d.2

51 : NESOSILICATES Insular SiO₄ Groups Only
4 : Insular SiO₄ Groups Only with cations in [6] and >[6] coordination

Hey's CIM Ref.:

16.9.17

16 : Silicates Containing Aluminum and other Metals
9 : Aluminosilicates of Ca

Mineral SymbolsHide

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.

Symbol	Source	Reference
Kto	IMA–CNMNC	Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
Kto	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 KatoiteHide

Lustre:

Vitreous

Colour:

Colourless

Streak:

White

Hardness:

5 - 6 on Mohs scale

Density:

3.013(5) g/cm³ (Calculated)

Optical Data of KatoiteHide

Type:

Isotropic

Chemistry of KatoiteHide

Mindat Formula:

Ca₃Al₂[◻(OH)₄]₃

The formula for general "hydrogrossular" is derived by the progressive exchange of grossular's Si with vacancies (◻), while maintaining local charge balance by attaching one H⁺ to each of the four adjacent oxygens (so 4H⁺ in total) per each one Si⁴⁺ lost. This progressive exchange can also be represented as Ca₃Al₂(SiO₄)_3-x(OH)_4x. In end-member katoite, the replacement is complete (so x = 3).

Previously, the mineral "hibschite" (no longer an IMA-approved species) was considered an intermediate member of the grossular-katoite series, and was defined as Ca₃Al₂(SiO₄)_3-x(OH)_4x, where x = 0.2-1.5; compositions where x < 0.2 were still considered grossular, whereas compositions where x > 1.5 were considered katoite. Now, based on the modern "50% rule", what was previously called "hibschite" would now be considered grossular (or perhaps more descriptively as "OH-bearing grossular"), although "hibschite", "hydrogrossular" and "hydrogarnet" are still all informally in common use.

Elements listed:

Al, Ca, H, O - search for minerals with similar chemistry

Common Impurities:

Mg,S

Chemical AnalysisHide

Empirical formulas:

Sample ID	Empirical Formula
1	{Ca₃[(Al_1.61Fe3⁺_0.21Mg_0.06Ti_0.02)⁴⁺_Σ1.90S0.10]_Σ2.00(◻_1.87Si_1.12S⁶⁺_0.01)_Σ3.00[(OH)_7.19O_4.61F_0.15Cl_0.05]_Σ12.00

Sample references:

ID	Locality	Reference	Notes
1	Unnamed quarry, Tadano, Koriyama City, Fukushima Prefecture, Japan	Banno, Yasuyuki, Momma, Koichi, Miyawaki, Ritsuro, Bunno, Michiaki (2023) New data on S-bearing katoite from Tadano, Fukushima Prefecture, Japan: an implication of the presence of both (SO₃)^2- and (SO₄)^2- in the garnet structure. Journal of Mineralogical and Petrological Sciences, 118 (1) 220724	via electron microprobe, X-ray single crystal structure refinement, and infrared (IR) spectroscopy

Crystallography of KatoiteHide

Crystal System:

Isometric

Class (H-M):

m3m (4/m 3 2/m) - Hexoctahedral

Space Group:

Ia3d

Setting:

Ia3d

Cell Parameters:

a = 12.24095(8) Å

Unit Cell V:

1,834.19 Å³ (Calculated from Unit Cell)

Comment:

Synthetic katoite has a = 12.5731(2) A (Lager et al., 2002).

Crystal StructureHide

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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure

ID	Species	Reference	Year	Pressure (GPa)	Temp (K)
0001827	Katoite	Lager G A, Von Dreele R B (1996) Neutron powder diffraction study of hydrogarnet to 9.0 GPa American Mineralogist 81 1097-1104	1996	0.0001	293
0001828	Katoite	Lager G A, Von Dreele R B (1996) Neutron powder diffraction study of hydrogarnet to 9.0 GPa American Mineralogist 81 1097-1104	1996	0.78	293
0001829	Katoite	Lager G A, Von Dreele R B (1996) Neutron powder diffraction study of hydrogarnet to 9.0 GPa American Mineralogist 81 1097-1104	1996	3.6	293
0001830	Katoite	Lager G A, Von Dreele R B (1996) Neutron powder diffraction study of hydrogarnet to 9.0 GPa American Mineralogist 81 1097-1104	1996	6.1	293
0001831	Katoite	Lager G A, Von Dreele R B (1996) Neutron powder diffraction study of hydrogarnet to 9.0 GPa American Mineralogist 81 1097-1104	1996	7.9	293
0001832	Katoite	Lager G A, Von Dreele R B (1996) Neutron powder diffraction study of hydrogarnet to 9.0 GPa American Mineralogist 81 1097-1104	1996	9	293
0002791	Katoite	Lager G A, Downs R T, Origlieri M J, Garoutte R (2002) High-pressure single-crystal X-ray diffraction study of katoite hydrogarnet: Evidence for a phase transition from Ia-3d - I-43d symmetry at 5 GPa American Mineralogist 87 642-647	2002	0	293
0002792	Katoite	Lager G A, Downs R T, Origlieri M J, Garoutte R (2002) High-pressure single-crystal X-ray diffraction study of katoite hydrogarnet: Evidence for a phase transition from Ia-3d - I-43d symmetry at 5 GPa American Mineralogist 87 642-647	2002	2.15	293
0002793	Katoite	Lager G A, Downs R T, Origlieri M J, Garoutte R (2002) High-pressure single-crystal X-ray diffraction study of katoite hydrogarnet: Evidence for a phase transition from Ia-3d - I-43d symmetry at 5 GPa American Mineralogist 87 642-647	2002	4.21	293
0002794	Katoite	Lager G A, Downs R T, Origlieri M J, Garoutte R (2002) High-pressure single-crystal X-ray diffraction study of katoite hydrogarnet: Evidence for a phase transition from Ia-3d - I-43d symmetry at 5 GPa American Mineralogist 87 642-647	2002	5.09	293
0002795	Katoite	Lager G A, Downs R T, Origlieri M J, Garoutte R (2002) High-pressure single-crystal X-ray diffraction study of katoite hydrogarnet: Evidence for a phase transition from Ia-3d - I-43d symmetry at 5 GPa American Mineralogist 87 642-647	2002	6	293
0002796	Katoite	Lager G A, Downs R T, Origlieri M J, Garoutte R (2002) High-pressure single-crystal X-ray diffraction study of katoite hydrogarnet: Evidence for a phase transition from Ia-3d - I-43d symmetry at 5 GPa American Mineralogist 87 642-647	2002	6	293
0002797	Katoite	Lager G A, Downs R T, Origlieri M J, Garoutte R (2002) High-pressure single-crystal X-ray diffraction study of katoite hydrogarnet: Evidence for a phase transition from Ia-3d - I-43d symmetry at 5 GPa American Mineralogist 87 642-647	2002	7.09	293
0002798	Katoite	Lager G A, Downs R T, Origlieri M J, Garoutte R (2002) High-pressure single-crystal X-ray diffraction study of katoite hydrogarnet: Evidence for a phase transition from Ia-3d - I-43d symmetry at 5 GPa American Mineralogist 87 642-647	2002	7.78	293
0003740	Katoite	Lager G A, Marshall W G, Liu Z, Downs R T (2005) Re-examination of the hydrogarnet structure at high pressure using neutron powder diffraction and infrared spectroscopy American Mineralogist 90 639-644	2005	0.08	293
0003741	Katoite	Lager G A, Marshall W G, Liu Z, Downs R T (2005) Re-examination of the hydrogarnet structure at high pressure using neutron powder diffraction and infrared spectroscopy American Mineralogist 90 639-644	2005	0.8	293
0003742	Katoite	Lager G A, Marshall W G, Liu Z, Downs R T (2005) Re-examination of the hydrogarnet structure at high pressure using neutron powder diffraction and infrared spectroscopy American Mineralogist 90 639-644	2005	1.72	293
0003743	Katoite	Lager G A, Marshall W G, Liu Z, Downs R T (2005) Re-examination of the hydrogarnet structure at high pressure using neutron powder diffraction and infrared spectroscopy American Mineralogist 90 639-644	2005	2.98	293
0003744	Katoite	Lager G A, Marshall W G, Liu Z, Downs R T (2005) Re-examination of the hydrogarnet structure at high pressure using neutron powder diffraction and infrared spectroscopy American Mineralogist 90 639-644	2005	4.05	293
0003745	Katoite	Lager G A, Marshall W G, Liu Z, Downs R T (2005) Re-examination of the hydrogarnet structure at high pressure using neutron powder diffraction and infrared spectroscopy American Mineralogist 90 639-644	2005	5.4	293
0003746	Katoite	Lager G A, Marshall W G, Liu Z, Downs R T (2005) Re-examination of the hydrogarnet structure at high pressure using neutron powder diffraction and infrared spectroscopy American Mineralogist 90 639-644	2005	6.65	293
0003747	Katoite	Lager G A, Marshall W G, Liu Z, Downs R T (2005) Re-examination of the hydrogarnet structure at high pressure using neutron powder diffraction and infrared spectroscopy American Mineralogist 90 639-644	2005	7.55	293
0003748	Katoite	Lager G A, Marshall W G, Liu Z, Downs R T (2005) Re-examination of the hydrogarnet structure at high pressure using neutron powder diffraction and infrared spectroscopy American Mineralogist 90 639-644	2005	8.56	293
0003749	Katoite	Lager G A, Marshall W G, Liu Z, Downs R T (2005) Re-examination of the hydrogarnet structure at high pressure using neutron powder diffraction and infrared spectroscopy American Mineralogist 90 639-644	2005	9.42	293
0006980	Katoite	Ferro O, Galli E, Papp G, Quartieri S, Szakall S, Vezzalini G (2003) A new occurrence of katoite and re-examination of the hydrogrossular group European Journal of Mineralogy 15 419-426	2003	0	200
0006981	Katoite	Ferro O, Galli E, Papp G, Quartieri S, Szakall S, Vezzalini G (2003) A new occurrence of katoite and re-examination of the hydrogrossular group European Journal of Mineralogy 15 419-426	2003	0	200
0016002	Katoite	Cohen-Addad C, Ducros P, Bertaut E (1967) Etude de la substitution du groupement SiO4 par (OH)4 dans les composes Al2Ca3(OH)12 et Al2Ca3(SiO4)2.16 (OH)3.36 de type grenat _cod_database_code 1008060 Acta Crystallographica 23 220-230	1967	0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Katoite'
loop_
_publ_author_name
'Lager G A'
'Von Dreele R B'
_journal_name_full 'American Mineralogist'
_journal_volume 81 
_journal_year 1996
_journal_page_first 1097
_journal_page_last 1104
_publ_section_title
;
 Neutron powder diffraction study of hydrogarnet to 9.0 GPa
 P = 0.0001 GPa
;
_database_code_amcsd 0001827
_chemical_formula_sum 'Ca3 Al2 H12 O12'
_cell_length_a 12.5695
_cell_length_b 12.5695
_cell_length_c 12.5695
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 1985.885
_exptl_crystal_density_diffrn      2.530
_symmetry_space_group_name_H-M 'I a -3 d'
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loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Ca   0.12500   0.00000   0.25000   0.00600
Al   0.00000   0.00000   0.50000   0.01600
H   0.15170   0.09190   0.79390   0.03100
O   0.02780   0.05250   0.63920   0.01200

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
2.763 Å	(100)
2.257 Å	(58)
2.004 Å	(58)
3.089 Å	(50)
5.046 Å	(37)
1.6507 Å	(37)
3.303 Å	(32)

Comments:

Campomorto quarry, Italy. The data are from Passaglia and Rinaldi (1984).

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
Stage 3b: Earth’s earliest hydrosphere	>4.45
16 : Low-𝑇 aqueous alteration of Hadean subaerial lithologies (see also #23)
Near-surface Processes
22 : Hydration and low-𝑇 subsurface aqueous alteration (see also #23)
Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere	<0.6
51 : Pyrometamorphic minerals (see also #54 and #56)	<0.36

Type Occurrence of KatoiteHide

Type Locality:

ⓘ Campomorto Quarry, Pietra Massa Locality, Montalto di Castro, Viterbo Province, Lazio, Italy

Synonyms of KatoiteHide

C3AH6

IMA1982-080a

Tricalcium Aluminate Hydrate

Other Language Names for KatoiteHide

German:Katoit

Japanese:加藤柘榴石

Russian:Катоит

Spanish:Katoita

Varieties of KatoiteHide

Sulfur-bearing Katoite

Relationship of Katoite to other SpeciesHide

Member of:

Garnet Supergroup

Other Members of this group:

Berzeliite Group	X₃Z₂[TO₄]₃
Bitikleite Group	Ca₃Z₂[TO₄]₃
Cryolithionite	Na₃Al₂(LiF₄)₃	Iso. m3m (4/m 3 2/m) : Ia3d
Garnet Group	X₃Z₂(SiO₄)₃
Henritermierite Group	Ca₃Z₂(SiO₄)₂[◻(OH)₄]
Monteneveite	Ca₃Sb⁵⁺₂(Fe³⁺₂Fe²⁺)O₁₂	Iso. m3m (4/m 3 2/m) : Ia3d
Nikmelnikovite	Ca₁₂(Fe²⁺Fe³⁺₃Al₃◻)[SiO₄]₆[◻(OH)₄]₅◻₄	Trig. 3 : R3
Priscillagrewite-(Y)	(Ca₂Y)Zr₂(AlO₄)₃	Iso.
Schorlomite Group	Ca₃Z₂[SiO₄][TO₄]₂
UM1984-37-SiO:CrMn	Mn²⁺₃Cr³⁺₂(SiO₄)₃
Xuite	Ca₃Fe³⁺₂[(AlO₃(OH)]₃	Iso. m3m (4/m 3 2/m)
Yafsoanite	Ca₃Te⁶⁺₂(ZnO₄)₃	Iso. m3m (4/m 3 2/m) : Ia3d

Forms a series with:

Hibschite	Hibschite-Katoite Series
Grossular	Grossular-Katoite Series

Common AssociatesHide

Associated Minerals Based on Photo Data:

3 photos of Katoite associated with Afwillite	Ca₃(HSiO₄)₂ · 2H₂O
1 photo of Katoite associated with Magnetite	Fe²⁺Fe³⁺₂O₄
1 photo of Katoite associated with Tobermorite	Ca₄Si₆O₁₇(H₂O)₂ · (Ca · 3H₂O)
1 photo of Katoite associated with Hydrocalumite	Ca₄Al₂(OH)₁₂(Cl,CO₃,OH)₂ · 4H₂O

Related Minerals - Strunz-mindat Grouping Hide

4.FF.05

Hydroromarchite

Sn₃O₂(OH)₂

Tet. 4 2m : P4 2₁c

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 KatoiteHide

mindat.org URL:

https://www.mindat.org/min-2167.html
Please feel free to link to this page.

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External Links:

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Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Handbook of Mineralogy page PDF

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References for KatoiteHide

Reference List:

forum.amiminerals.it/viewtopic.php?f=5&t=19128&sid=5b7ef9696f07de7d93b0fc787fb10c5e

Cohen-Addad, C., Ducros, P., and Bertaut, E.F. (1967) Étude de la substitution du groupement SiO4 par (OH)4 dans les composés Al2Ca3(OH)12 et Al2Ca3(SiO4)2.16(OH)3.36 de type grenat. Acta Crystallographica, 23, 220–230.

Foreman, D.W. Jr. (1968) Neutron and X-ray diffraction study of Ca3Al2(O4D4)3, a garnetoid. The Journal of Chemical Physics, 48, 3037–3041.

Passaglia, E., Rinaldi, R. (1984) Katoite, a new member of the Ca3Al2(SiO4)3{Ca3Al2(OH)12 series and a new nomenclature for the hydrogrossular group of minerals. Bulletin de Minéralogie: 107: 605-618.

Dunn, Pete J., Fleischer, Michael, Langley, Richard H., Shigley, James E., Zilczer, Janet A. (1985) New mineral names. American Mineralogist, 70 (7-8) 871-881

Sacerdoti, M., Passaglia, E. (1985) The crystal structure of katoite and implications within the hydrogrossular group of minerals. Bulletin de Minéralogie: 108: 1-8.

Lager, G.A., Armbruster, T., and Faber, G. (1987) Neutron and X-ray diffraction study of hydrogarnet Ca3Al2(O4H4)3. American Mineralogist, 72, 756–765.

Canadian Mineralogist: (1990): 28: 87.

Rossman, G.R., and Aines, R.D. (1991) The hydrous components in garnets: Grossular-hydrogrossular. American Mineralogist, 76, 1153–1164.

Milman, V., Winkler, B., Nobes, R.H., Akhmatchaya, E.V., Pickard, C.J., White, J.A. (2000) Garnets: structure, compressibility, dynamics, and disorder. Journal of the Minerals, Metals and Materials Society: 52(7): 22-25.

Lager, G.A., Downs, R.T., Origlieri, M., Garoutte, R. (2002) High-pressure single-crystal X-ray diffraction study of katoite hydrogarnet: Evidence for a phase transition from Ia3d -> I43d symmetry at 5 GPa. American Mineralogist: 87: 642-647. [synthetic sample]

Ferro, O., Galli, E., Papp, G., Quartieri, S., Szakall, S., Vezzalini, G. (2003) A new occurrence of katoite and re-examination of the hydrogrossular group. European Journal of Mineralogy: 15: 419-426.

Blass, G., Graf, H.W., Sebold, D. (2004) Über "Hydrogrossulare" sowie einen Neufund des seltenen Hydrogranats Katoit vom Bellerberg, Eifel. Mineralien-Welt: 15(6): 16-20. (in German)

Kolesov, B.A., Geiger, C.A. (2005) The vibrational spectrum of synthetic hydrogrossular (katoite) Ca3Al2(O4H4)3: a low-temperature IR and Raman spectroscopic study. American Mineralogist: 90: 1335-1341.

Teertstra, D.K. (2006) Index-of-refraction and unit-cell constraints on cation valence and pattern of order in garnet-group minerals. Canadian Mineralogist: 44: 341-346.

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

Lacivita, V., Mahmoud, A., Erba, A., D'Arco, P., Mustapha, S. (2015) Hydrogrossular, Ca3Al2(SiO4)3-x(H4O4)x: An ab initio investigation of its structural and energetic properties. American Mineralogist: 100: 2637-2649.

Geng, G., Myers, R.J., Kilcoyne, A.L.D., Ha, J., Monteiro, P.J.M. (2017) Ca L2,3-edge near edge X-ray absorption fine structure of tricalcium aluminate, gypsum, and calcium (sulfo)aluminate hydrates. American Mineralogist: 102: 900-908.

Geiger, C.A. & Rossman, G.R. (2018): IR spectroscopy and OH− in silicate garnet: The long quest to document the hydrogarnet substitution. American Mineralogist, 103, 384–393.

Keen, D.A., Keeble, D.S., Bennett, T.D. (2018): Neutron and X-ray total scattering study of hydrogen disorder in fully hydrated hydrogrossular, Ca3Al2(O4H4)3. Physics and Chemistry of Minerals, 45, 333-342.

KATO, Masato, KYONO, Atsushi (2019) An in situ Raman study on katoite Ca₃Al₂(O₄H₄)₃ at high pressure. Journal of Mineralogical and Petrological Sciences, 114 (1) 18-25 doi:10.2465/jmps.180530

KYONO, Atsushi, ARORA, Shubhi (2019) Crystal structure change in grossular–Si–free katoite solid solution: Oxygen position splitting in katoite. Journal of Mineralogical and Petrological Sciences, 114 (4) 189-200 doi:10.2465/jmps.190424

Banno, Yasuyuki, Momma, Koichi, Miyawaki, Ritsuro, Bunno, Michiaki (2023) New data on S-bearing katoite from Tadano, Fukushima Prefecture, Japan: an implication of the presence of both (SO₃)^2- and (SO₄)^2- in the garnet structure. Journal of Mineralogical and Petrological Sciences, 118 (1) 220724

(2023) Katoite. Handbook of Mineralogy. Mineralogical Society of America

Localities for KatoiteHide

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

- 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.


Antarctica
Eastern Antarctica Victoria Land Ross Archipelago Ross Island ⓘ Mount Erebus	Kammerer (2011)

Germany
Bavaria Lower Franconia Haßberge District Maroldsweisach ⓘ Zeilberg Quarry	Wittern (2001)
Rhineland-Palatinate Mayen-Koblenz Vordereifel Ettringen ⓘ Caspar quarry	Blass et al. (2004)
ⓘ Wernerkrauseite-bearing xenolith	Galuskin et al. (2016)

Hungary
Pest County Szentendre District Dunabogdány ⓘ Csódi Hill	Topographia Mineralogica Hungariae VI. +2 other references
Veszprém County Tapolca District Uzsa ⓘ Láz Hill mine

Israel
Southern District (HaDarom District) Tamar Regional Council ⓘ Hatrurim Basin	Galuskin et al. (2015)
ⓘ Har Parsa (Mt. Parsa)	Galuskin et al. (2016)
ⓘ Zohar wadi	Galuskin +1 other reference

Italy
Lazio Metropolitan City of Rome Capital Rome Valleranello ⓘ Vallerano Quarries	Carlini et al. (2018)
Viterbo Province Montalto di Castro Pietra Massa Locality ⓘ Campomorto Quarry (TL)	Passaglia et al. (1982)

Japan
Fukushima Prefecture Koriyama City Tadano ⓘ Unnamed quarry	Banno et al. (2023)

Middle East
ⓘ Hatrurim Formation	Gross (1977)

Norway
Telemark Skien ⓘ Flekkeren	Jamtveit et al. (1997)

Palestine
West Bank Bethlehem Governorate ⓘ Nahal Darga	Galuskina et al. (2019)
Quds Governorate ⓘ Jebel Harmun (Jabel Harum)	Galuskin et al. (2015)

Romania
Caraş-Severin County Prigor ⓘ Crişenilor brook skarn occurrence	Marincea et al. (2015)

Russia
Kabardino-Balkaria Baksan Valley Upper Chegem volcanic caldera (Verkhnechegemskaya caldera) Lakargi Mountain ⓘ Xenolith no. 7	Galuskina et al. (2013)

Slovakia
Prešov Region Vranov nad Topľou District Vechec ⓘ Vechec quarry	Zajzon N. et al. (2021)

Katoite

About KatoiteHide

Unique IdentifiersHide

IMA Classification of KatoiteHide

Classification of KatoiteHide

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Optical Data of KatoiteHide

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Chemical AnalysisHide

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Crystal StructureHide

X-Ray Powder DiffractionHide

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Type Occurrence of KatoiteHide

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Relationship of Katoite to other SpeciesHide

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Related Minerals - Strunz-mindat GroupingHide

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References for KatoiteHide

Localities for KatoiteHide

Locality ListHide

Related Minerals - Strunz-mindat Grouping Hide