Neotocite
A valid IMA mineral species - grandfathered
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About Neotocite
Formula:
(Mn,Fe)SiO3 · H2O (?)
Colour:
Black, dark brown to dark olive-green, dark red-brown
Lustre:
Resinous, Waxy, Greasy
Hardness:
3 - 4
Specific Gravity:
2.43
Crystal System:
Amorphous
Name:
Named in 1848 by Nils Adolf Erik Nordenskiöld from the Greek, νεοτοκοζ meaning of recent origin, as it is an alteration product.
Type Locality:
Hisingerite-Neotocite Series.
An amorphous to poorly crystalline, hydrated Mn silicate.
Mn is assumed to be divalent (Brusnitsyn and Egorov, 2023).
An amorphous to poorly crystalline, hydrated Mn silicate.
Mn is assumed to be divalent (Brusnitsyn and Egorov, 2023).
Unique Identifiers
Mindat ID:
2879
Long-form identifier:
mindat:1:1:2879:6
IMA Classification of Neotocite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
(Mn2+,Fe2+)SiO3·H2O
First published:
1849
Classification of Neotocite
9.ED.20
9 : SILICATES (Germanates)
E : Phyllosilicates
D : Phyllosilicates with kaolinite layers composed of tetrahedral and octahedral nets
9 : SILICATES (Germanates)
E : Phyllosilicates
D : Phyllosilicates with kaolinite layers composed of tetrahedral and octahedral nets
71.1.5.4
71 : PHYLLOSILICATES Sheets of Six-Membered Rings
1 : Sheets of 6-membered rings with 1:1 layers
71 : PHYLLOSILICATES Sheets of Six-Membered Rings
1 : Sheets of 6-membered rings with 1:1 layers
14.18.37
14 : Silicates not Containing Aluminum
18 : Silicates of Mn and Na, K, Mg, Ca or Fe
14 : Silicates not Containing Aluminum
18 : Silicates of Mn and Na, K, Mg, Ca or Fe
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Neo | 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 Neotocite
Resinous, Waxy, Greasy
Transparency:
Transparent, Translucent
Colour:
Black, dark brown to dark olive-green, dark red-brown
Streak:
Dark brown to black
Hardness:
3 - 4 on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Conchoidal, Sub-Conchoidal
Density:
2.43 g/cm3 (Measured)
Optical Data of Neotocite
Type:
Isotropic
RI values:
nα = 1.50 - 1.65
Birefringence:
0.00
Surface Relief:
Unknown
Pleochroism:
Non-pleochroic
Chemistry of Neotocite
Mindat Formula:
(Mn,Fe)SiO3 · H2O (?)
Common Impurities:
Al,Mg,Ca,Na,K,C
Crystallography of Neotocite
Crystal System:
Amorphous
Morphology:
Botryoidal, also resinous brown to black masses or veinlets
Comment:
Amorphous to poorly crystalline; crystal system unknown.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.36 Å | (100b) |
| 3.59 Å | (100b) |
| 2.59 Å | (1) |
| 1.54 Å | (100b) |
Comments:
ICDD 14-172. Indistinguishable from hisingerite.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 22 : Hydration and low-? subsurface aqueous alteration (see also #23) | |
| High-? alteration and/or metamorphism | |
| 32 : Ba/Mn/Pb/Zn deposits, including metamorphic deposits |
Type Occurrence of Neotocite
Synonyms of Neotocite
Other Language Names for Neotocite
Varieties of Neotocite
| Chinglusuite | A compositional variety of neotocite (Burke, 2006). |
Relationship of Neotocite to other Species
Forms a series with:
Common Associates
Associations Based on Photo Data:
| 21 photos of Neotocite associated with Rhodochrosite | MnCO3 |
| 11 photos of Neotocite associated with Rhodonite | CaMn3Mn[Si5O15] |
| 9 photos of Neotocite associated with Calcite | CaCO3 |
| 8 photos of Neotocite associated with Ussingite | Na2AlSi3O8OH |
| 7 photos of Neotocite associated with Quartz | SiO2 |
| 5 photos of Neotocite associated with Kutnohorite | CaMn2+(CO3)2 |
| 5 photos of Neotocite associated with Parsettensite | (K,Na,Ca)7.5(Mn,Mg)49Si72O168(OH)50 · nH2O |
| 4 photos of Neotocite associated with Vuonnemite | Na11Ti4+Nb2(Si2O7)2(PO4)2O3(F,OH) |
| 4 photos of Neotocite associated with Serandite | NaMn2+2Si3O8(OH) |
| 4 photos of Neotocite associated with Pyrite | FeS2 |
Related Minerals - Strunz-mindat Grouping
| 9.ED. | 'Clinochrysotile' | Mg3(Si2O5)(OH)4 |
| 9.ED.05 | Dickite | Al2(Si2O5)(OH)4 |
| 9.ED.05 | Nacrite | Al2(Si2O5)(OH)4 |
| 9.ED.05 | Kaolinite | Al2(Si2O5)(OH)4 |
| 9.ED.05 | Odinite | (Fe,Mg,Al,Fe,Ti,Mn)2.4((Si,Al)2O5)(OH)4 |
| 9.ED.10 | Halloysite | Al2Si2O5(OH)4 · n(H2O) |
| 9.ED.10 | Hisingerite | Fe3+2(Si2O5)(OH)4 · 2H2O |
| 9.ED.10 | 'Hydrohalloysite' | Al2Si2O5(OH)4 · 2H2O |
| 9.ED.15 | Antigorite | Mg3(Si2O5)(OH)4 |
| 9.ED.15 | Brindleyite | (Ni,Al)3(Si,Al)2O5(OH)4 |
| 9.ED.15 | Fraipontite | (Zn,Al)3((Si,Al)2O5)(OH)4 |
| 9.ED.15 | Népouite | Ni3Si2O5(OH)4 |
| 9.ED.15 | Pecoraite | Ni3(Si2O5)(OH)4 |
| 9.ED.15 | Guidottiite | Mn2Fe3+(Fe3+SiO5)(OH)4 |
| 9.ED.15 | Lizardite | Mg3(Si2O5)(OH)4 |
| 9.ED.15 | Berthierine | (Fe2+,Fe3+,Al)3(Si,Al)2O5(OH)4 |
| 9.ED.15 | Kellyite | Mn2+2Al(AlSiO5)(OH)4 |
| 9.ED.15 | Cronstedtite | Fe2+2Fe3+((Si,Fe3+)2O5)(OH)4 |
| 9.ED.15 | Caryopilite | Mn2+3Si2O5(OH)4 |
| 9.ED.15 | Amesite | Mg2Al(AlSiO5)(OH)4 |
| 9.ED.15 | Greenalite | (Fe2+,Fe3+)2-3Si2O5(OH)4 |
| 9.ED.15 | Manandonite | Li2Al4(Si2AlB)O10(OH)8 |
| 9.ED.20 | Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| 9.ED.20 | Allophane | (Al2O3)(SiO2)1.3-2 · 2.5-3H2O |
| 9.ED.20 | Imogolite | Al2SiO3(OH)4 |
| 9.ED.25 | Bismutoferrite | Fe3+2Bi(SiO4)2(OH) |
| 9.ED.25 | Chapmanite | Fe3+2Sb3+(Si2O5)O3(OH) |
| 9.ED.30 | 'Pianlinite' | Al2Si2O6(OH)2 |
Fluorescence of Neotocite
Not fluorescent in ultraviolet
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 Neotocite
mindat.org URL:
https://www.mindat.org/min-2879.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Neotocite
Reference List:
Whelan, J. A., Goldich, S. S. (1961) New data for hisingerite and neotocite. American Mineralogist, 46 (11-12) 1412-1423
Clark, A. M., Easton, A. J., Mount, M. (1978) A study of the neotocite group. Mineralogical Magazine, 42 (322) 279-280 doi:10.1180/minmag.1978.042.322.19
Mackenzie, K.J.D., Berezowski, R.M. (1980) Thermal and Mossbauer studies of iron-containing hydrous silicates. II. Hisingerite. Thermochimica Acta, 41. 335-355 doi:10.1016/0040-6031(80)87210-8
Eggleton, R. A., Pennington, J. H., Freeman, R. S., Threadgold, I. M. (1983) Structural aspects of the hisingerite-neotocite series. Clay Minerals, 18 (1) 21-31 doi:10.1180/claymin.1983.018.1.03
Dunn, Pete J., Grice, Joel D. Fleischer, Michael, Pabst, Adolf (1984) New mineral names. American Mineralogist, 69 (1-2) 210-215
Povondra, P. (1996) Minerals of the hisingerite-neotocite series from Chvaletice, Železné hory Mts., eastern Bohemia, Czech Republic. Journal of the Czech Geological Society, 41 (1-2) 7-14
Localities for Neotocite
Showing 232 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.
Argentina | |
| Singer et al. (2008) |
| Sureda |
| Sillitoe et al. (2019) |
Australia | |
| Singer et al. (2005) |
| Brown et al. (1992) |
| Coombs et al. (2009) | |
| Birch (1999) |
| Munro-Smith (2006) |
| Den (1977) |
| Singer et al. (2008) |
| Singer et al. (2008) |
Austria | |
| C.Auer (2016) |
Brazil | |
| Williams et al. (2008) |
| acd.ufrj.br (2002) | |
Bulgaria | |
| Marcus Voigt Collection |
| Aleksiev (1967) | |
| Collection Voigt +1 other reference |
Canada | |
| personal correspondence with Giles Peatfield (see comments in description) |
| Horváth et al. (1990) |
| Singer et al. (2008) +1 other reference |
Chile | |
| Singer et al. (2008) |
| Zambra et al. (2007) |
| Teck Resources Limited |
China | |
| Zhao Zhenhua and Tu Guangzhi (1996) |
Cuba | |
| www.minsocam.org |
Czech Republic | |
| Povondra (1995) +1 other reference |
| Zak (1956) | |
DR Congo | |
| Färber (n.d.) |
Ecuador | |
| Singer et al. (2008) |
| Singer et al. (2008) | |
Fiji | |
| Leggo (1977) +1 other reference |
Finland | |
| Heikkilä |
| Nordenskiöld (1855) +1 other reference |
France | |
| Chopin (1978) |
| Chopin (1978) |
Germany | |
| SEM-EDS et al. (H2O) |
| Glass et al. (1939) |
| Witzke (2013) |
Iran | |
| Yasami et al. (2025) |
Italy | |
| M.E. Ciriotti selfcollected 2005 |
| Piccoli et al. (2007) |
| Redazionale (2005) |
| 415. +1 other reference | |
| 415 (354) +1 other reference |
| Castellaro et al. (2023) |
| |
| Castellaro et al. (2011) |
| Antofilli et al. (1983) |
| Piccoli et al. (2007) +1 other reference |
| Cámara et al. (2017) |
| Ambrino et al. (2010) |
| Ambrino (Piero) |
| Ferretti et al. (2018) |
| Bonifazi (2020) |
| Bonifazi (2020) |
| Boscardin et al. (2011) |
Japan | |
| Yamada collection (Crystal World, Japan) |
| Nakagawa et al. (2009) |
| Mineralogical Journal Vol. 18 (1996) |
| Petrov (n.d.) |
| Donald E. Lee (1955) | |
| Katsu Kaneko (1956) +1 other reference |
| Suzaki et al. (1969) |
| - (n.d.) |
| Fukuoka (1981) | |
| Nambu et al. (1961) | |
| Bull. Soc. Franç. Minéralo. ... |
| Excalibur Mineral Company specimen +2 other references |
| - (n.d.) |
| - (n.d.) |
| - (n.d.) |
| - (n.d.) | |
| Kaneko (1956) |
| Josef Vajdak collection (obtained from Minerals Unlimites, via the Joe Cilen collection # 11,432) |
| Nakagawa et al. (2009) | |
| Yamada (2004) |
| Yoshinaga (1963) |
| - (n.d.) +1 other reference |
| Uehara et al. (2014) |
| K. Nishikubo et al. (2005) |
| Takaharu Araki collection +1 other reference |
| Symposium sobre yacimientos de manganeso et al. (1956) |
| - (n.d.) +1 other reference |
| Hiroaki Tano specimens. +1 other reference |
| Akira Kato (undated manuscript) +1 other reference |
| Yoshimura (1969) |
| Bull. Kanagawa pref. Mus. (Nat. Sci.) |
| Lee (1955) +1 other reference |
| Lee (1955) +1 other reference | |
| Fumitoshi HIROWATARI (1961) |
| Lee (1955) +1 other reference | |
| Mayumi Yoshinaga (1963) | |
| H. Momoi (1964) | |
Kazakhstan | |
| Kayupova (1965) |
| Kayupova (1964) | |
| V.V. Kalinin data +1 other reference |
Mexico | |
| Singer et al. (2008) |
| |
| Espinosa Perea (1999) +1 other reference |
| Singer et al. (2008) |
| Valencia et al. (2006) +2 other references |
Mongolia | |
| Porter (Mike) |
| Porter (Mike) | |
Norway | |
| Breivik et al. (2007) |
| Nordrum (2009) |
| Larsen et al. (2005) |
| Larsen et al. (2005) | |
| Berge (n.d.) |
| Larsen et al. (2010) |
| Larsen et al. (2005) | |
| Larsen et al. (2010) | |
| Nordrum (2008) +1 other reference | |
Pakistan | |
| Singer et al. (2008) |
| Singer et al. (2008) |
Panama | |
| Redwood (2020) |
| Redwood (2020) |
Papua New Guinea | |
| Singer et al. (2008) |
Peru | |
| Singer et al. (2008) |
| www.portergeo.com.au (2007) |
| Miofuvhoedki (2001) |
| Singer et al. (2008) |
| Hyrsl et al. (2003) |
Philippines | |
| Ignacio (2006) |
| Singer et al. (2008) |
| Singer et al. (2008) |
Romania | |
| Hârtopanu et al. (1996) |
| Udubasa et al. (1996) +2 other references |
| Hârtopanu et al. (1996) +1 other reference |
| minerals-of-the-carpathians.eu (2008) |
| Ex Csanad Loranth Coll. who collected and ID it (XRD) +1 other reference | |
Russia | |
| Brusnitsyn et al. (2009) |
| Brusnitsyn (2006) |
| Dicken et al. (2016) |
| Afanas'ev +2 other references |
| Pekov et al. (2004) |
| - (2011) | |
| ... | |
| Pavel M. Kartashov |
| Старикова (2011) |
| Perevoznikova et al. (2009) |
| Brusnitsyn (2000) |
| Brusnitsyn A.I. (2000) |
| Brusnitsyn A.I. (2000) |
Slovakia | |
| Martin Števko-unpublished |
Spain | |
| Joan Abella i Creus (2012) |
Sudan | |
| Bierlein et al. (2020) |
Sweden (TL) | |
| Fleischer's Glossary of Mineral Species ... |
| |
| |
| Natural History Museum |
| Igelström (1851) +1 other reference |
| Nysten (2020) |
| |
Switzerland | |
| Brugger J. (1996) |
| Roth et al. (2011) |
UK | |
| Collins (1878) +4 other references |
| Golley et al. (1995) |
| Clark et al. (1978) |
USA | |
| - (2008) |
| Simons et al. (1963) +1 other reference |
| MRDS database Dep. ID #10026888. |
| I.S Merkel |
| Walder et al. (2004) |
| Merritt Stephen Enders (2000) | |
| Thomas et al. (1983) +1 other reference |
| Jones et al. (1983) |
| Smith (1988) |
| - (2005) |
| - (2005) |
| Murdoch (1966) |
| Murdoch (1966) | |
| - (2005) |
| Trask et al. (1943) +3 other references |
| Trask et al. (1943) +3 other references |
| Trask et al. (1943) +2 other references |
| Murdoch (1966) |
| - (2005) |
| Cal Div of Mines & Geo Bulletin 189 " ... |
| Trask et al. (1943) +2 other references |
| Trask et al. (1943) +2 other references |
| Trask et al. (1943) +2 other references |
| Trask et al. (1943) +2 other references |
| Huebner +3 other references |
| - (2005) |
| Dunning and Cooper (1987) |
| - (2005) |
| Huebner +3 other references |
| Pavlides et al. (1962) |
| Pavlides et al. (1962) |
| Pavlides et al. (1962) +1 other reference | |
| Quinn (1945) |
| Heinrich et al. (2004) |
| R. Kelley Laughlin | |
| Heinrich et al. (2004) | |
| James et al. (1970) |
| Rocks & Minerals: 62:166. +1 other reference | |
| Heinrich et al. (2004) |
| Heinrich et al. (2004) |
| Heinrich et al. (2004) |
| Longwell et al. (1965) |
| Dr. William S. Wise presentation to ... |
| Castor et al. (2004) |
| DeMatties (2026) |
| Dunn (1995) |
| Palache (1935) +1 other reference | |
| Dunn (1995) |
| Northrop et al. (1996) |
| Northrop et al. (1996) |
| Ross et al. (1932) |
| White (1987) |
| Rocks & Min. vol. 72 (1997) |
| R&M 72:4 pp 252-264 |
| Brown |
| Valentine et al. (1956) +1 other reference |
| Derkey et al. (1990, November) | |
| Valentine et al. (1960) | |
| Derkey et al. (1990, November) |
| Valentine et al. (1956) +1 other reference | |
| Valentine et al. (1956) +1 other reference | |
| Cannon (1975) | |
| Valentine et al. (1956) +1 other reference | |
| Cannon (1975) | |
| Derkey et al. (1990, November) +1 other reference | |
| Cannon (1975) |
| Glass et al. (1939) | |
| Derkey et al. (1990, November) |
| Derkey et al. (1990, November) | |
| Derkey et al. (1990, November) |
| Valentine et al. (1960) +1 other reference |
| Cordua (1998) +1 other reference |
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Gambatesa Mine, Reppia, Ne, Genoa, Liguria, Italy