Ghoseite Root Name Group
A group of related mineral species
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About Ghoseite Root Name Group
Formula:
◻(Mn2+Na)(C2+4C3+)Si8O22W2
The ghoseite minerals belongs to the Sodium-(magnesium-iron-manganese) amphibole subgroup and is defined with
A(Na+K+2Ca) < 0.5 apfu,
B(NaMn)
0.5 apfu< C(Al+Fe3++2Ti) < 1.5 apfu
The root-name mineral, ghoseite is defined with Mg, Al and (OH) as the dominant elements. Minerals in this root name with other dominant elements are named with pre-fixes in accordance with the guidelines establised in the 2012 amphibole nomenclature.
A(Na+K+2Ca) < 0.5 apfu,
B(NaMn)
0.5 apfu< C(Al+Fe3++2Ti) < 1.5 apfu
The root-name mineral, ghoseite is defined with Mg, Al and (OH) as the dominant elements. Minerals in this root name with other dominant elements are named with pre-fixes in accordance with the guidelines establised in the 2012 amphibole nomenclature.
Member of:
Name:
Ghoseite are named for Subrata Ghose (b. 1932), Emeritus Professor at the University of Washington, Seattle. Ghoseite was established as a new root name in the 2012 amphibole nomenclature (Root-name 11 in the amphibole nomenclature report). Amphibole with this composition was named parvowinchite from 1997 to 2012.
This page provides mineralogical data about Ghoseite Root Name Group.
Unique Identifiers
Mindat ID:
43530
Long-form identifier:
mindat:1:1:43530:9
Chemistry of Ghoseite Root Name Group
Mindat Formula:
◻(Mn2+Na)(C2+4C3+)Si8O22W2
The ghoseite minerals belongs to the Sodium-(magnesium-iron-manganese) amphibole subgroup and is defined with
A(Na+K+2Ca) < 0.5 apfu,
B(NaMn)
0.5 apfu< C(Al+Fe3++2Ti) < 1.5 apfu
The root-name mineral, ghoseite is defined with Mg, Al and (OH) as the dominant elements. Minerals in this root name with other dominant elements are named with pre-fixes in accordance with the guidelines establised in the 2012 amphibole nomenclature.
The ghoseite minerals belongs to the Sodium-(magnesium-iron-manganese) amphibole subgroup and is defined with
A(Na+K+2Ca) < 0.5 apfu,
B(NaMn)
0.5 apfu< C(Al+Fe3++2Ti) < 1.5 apfu
The root-name mineral, ghoseite is defined with Mg, Al and (OH) as the dominant elements. Minerals in this root name with other dominant elements are named with pre-fixes in accordance with the guidelines establised in the 2012 amphibole nomenclature.
Chemical Analysis
Oxide wt%:
| 1 | 2 | |
|---|---|---|
| SiO2 | 56.34 % | 55.73 % |
| Al2O3 | 0.96 % | 0.62 % |
| TiO2 | 0.00 % | |
| Fe2O3 | 7.44 % | |
| FeO | 3.14 % | 6.46 % |
| MgO | 17.32 % | 17.42 % |
| MnO | 4.61 % | 11.44 % |
| CaO | 1.32 % | 0.63 % |
| Na2O | 6.55 % | 4.31 % |
| K2O | 0.17 % | 0.14 % |
| F | 0.29 % | |
| H2O | 2.12 % | |
| O=F | 0.12 % | |
| Total: | 99.97 % | 97.16 % |
Empirical formulas:
| Sample ID | Empirical Formula |
|---|---|
| 1 | A(Na0.45K0.0,3)B0.48( (Na1.34Ca0.20Mn0.46) C2.00( (Mg3.64Fe2+0.37Mn2+0.09Fe3+0.79Ti0.00Al0.11) 5.00 T( (Si7.95Al0.05) 8.00OW22( (OH) 2.00) |
| 2 | A(Na0.18K0.0,05)0.23 B( (Na0.99Ca0.10Mn0.91) 2.00 C( (Mg3.70Mn2+0.47Fe3+0.77Al0.07) 5.00 T( (Si7.95Al0.05) 8.00O22 W( (OH) 1.87F0.13) 2.00 |
Sample references:
| ID | Locality | Reference | Notes |
|---|---|---|---|
| 1 | South Tirodi Mine, Tirodi, Balaghat District, Jabalpur Division, Madhya Pradesh, India | A Cameca Camebax electron microprobe operated at 15 kV and a beam current of l0 nA was used to analyze amphiboles. A Philips CM-12 scanning transmission electron microscope (STEM) equipped with a Kevex Quantum detector (EDS system) was used for TEM and AEM analyses. Selected-area electron difraction (SAED) patterns and multibeam images were obtained in the TEM mode, whereas AEM analyses were acquired in scanning mode. Fe3+ and H2O was calculated | |
| 2 | Iimori mine, Afuzu-mura, Iwade city, Wakayama Prefecture, Japan | BANNO, Yasuyuki, MOMMA, Koichi, MIYAWAKI, Ritsuro, YAMADA, Shigeo (2019) New data on ferri–ghoseite in Sanbagawa quartz schist from the Iimori region, Wakayama Prefecture, Japan: solid solution between magnesio–riebeckite and clino–suenoite. Journal of Mineralogical and Petrological Sciences, 114 (1) 33-40 doi:10.2465/jmps.181109 | Chemical analyses of the amphibole were performed on JEOL JXA–8800R and JEOL JXA–8900R electron microprobes at the GSJ Laboratory, AIST. Based on the relatively high oxygen fugacity indicated by the high Fe3+/(Fe2++Fe3+) ratios (0.99–1.0) of associated aegirine and garnet (Banno and Yamada, 2012), the Fe3+/Fe2+ ratios of the amphibole were estimated using the maximum ferric method of Leake et al. (1997). Total Mn was expressed as Mn2+, because, in this way, formulae calculated using the maximum ferric method satisfied the six criteria for calculation of amphibole formulae outlined by Leake et al. (1997). The amphibole is pale yellowish green and occurs as euhedral to subhedral crystals with lengths up to 500µm. |
Crystal Structure
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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) |
|---|---|---|---|---|---|---|---|
| 0006506 | Ferri-ghoseite | Oberti R, Ghose S (1993) Crystal-chemistry of a complex Mn-bearing alkali amphibole ("tirodite") on the verge of exsolution European Journal of Mineralogy 5 1153-1160 | 1993 | 0 | 293 |
CIF Raw Data - click here to close
Relationship of Ghoseite Root Name Group to other Species
Member of:
Other Members of Sodium-(Magnesium-Iron-Manganese) Amphibole Subgroup:
| Hjalmarite Root Name Group | A(Mn2+Na)(C5)(Si8O22)W2 | |
| Shojiite Root Name Group | A(NaMg)(C5)(Si8O22)W2 |
Ghoseite Root Name Group Members:
| Ferri-ghoseite | ◻(Mn2+Na)(Mg4Fe3+)Si8O22(OH)2 | Mon. 2/m : B2/m |
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 Ghoseite Root Name Group
mindat.org URL:
https://www.mindat.org/min-43530.html
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References for Ghoseite Root Name Group
Reference List:
Bilgrami, S. A. (1955) Manganese amphiboles from Chikla, Bhandara district, India. Mineralogical Magazine and Journal of the Mineralogical Society, 30 (229) 633-644 doi:10.1180/minmag.1955.030.229.03
Oberti, Roberta, Ghose, Subrata (1993) Crystal-chemistry of a complex Mn-bearing alkali amphibole ("tirodite") on the verge of exsolution. European Journal of Mineralogy, 5 (6) 1153-1160 doi:10.1127/ejm/5/6/1153
Leake, B. E., Woolley, A. R., Arps, C. E. S., Birch, W. D., Gilbert, M. C., Grice, J. D., Hawthorne, F. C., Kato, A., Kisch, H. J., Krivovochev, V. G., Linthout, K., Laird, J., Mandarino, J. A., Maresch, W. V., Nickel, E.H., Rock, N. M. S., Schumacher, J. C., Smith, D. C., Stephenson, N. C. N., Ungaretti, L., Whittaker, E. J. W., Youzhi, Gou (1997) Nomenclature of amphiboles: report of the Subcommittee on Amphiboles of the International Mineralogical Association, Commission on New Minerals and Mineral Names. The Canadian Mineralogist, 35 (1) 219-246
Burke, E. A.J.; Ferraris, G. (2004) New minerals and nomenclature modifications approved in 2003 by the Commission on New Mineral Names, International Mineralogical Association. The Canadian Mineralogist, 42 (3). p.905-913. doi:10.2113/gscanmin.42.3.905
Burke, E. A. J., Ferraris, G. (2004) New Minerals Approved in 2003 and Nomenclature Modifications Approved in 2003 by the Commission on New Minerals and Mineral Names, International Mineralogical Association. Mineralogy and Petrology, 82 (1) 161-177 doi:10.1007/s00710-004-0043-7
South Tirodi Mine, Tirodi, Balaghat District, Jabalpur Division, Madhya Pradesh, India