Holmquistite Root Name Group
A group of related mineral species
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About Holmquistite Root Name Group
Formula:
◻Li2(C2+3C3+2)(Si8O22)(OH)2
The holmquistite minerals are orthorhombic amphiboles in the lithium amphibole subgroup.
The individual members of the group are defined by the dominant elements in the C2+ and C3+ positions.
The root-name species of the group, holmquistite, is defined as the Mg and Al dominant member of the group.
The individual members of the group are defined by the dominant elements in the C2+ and C3+ positions.
The root-name species of the group, holmquistite, is defined as the Mg and Al dominant member of the group.
Crystal System:
Orthorhombic
Name:
For Per Johan Holmquist (1866-1946), petrologist from Stockholm, Sweden.
This page provides mineralogical data about Holmquistite Root Name Group.
Unique Identifiers
Mindat ID:
8958
Long-form identifier:
mindat:1:1:8958:2
Chemistry of Holmquistite Root Name Group
Mindat Formula:
◻Li2(C2+3C3+2)(Si8O22)(OH)2
The holmquistite minerals are orthorhombic amphiboles in the lithium amphibole subgroup.
The individual members of the group are defined by the dominant elements in the C2+ and C3+ positions.
The root-name species of the group, holmquistite, is defined as the Mg and Al dominant member of the group.
The holmquistite minerals are orthorhombic amphiboles in the lithium amphibole subgroup.
The individual members of the group are defined by the dominant elements in the C2+ and C3+ positions.
The root-name species of the group, holmquistite, is defined as the Mg and Al dominant member of the group.
Chemical Analysis
Oxide wt%:
| 1 | 2 | 3 | 4 | 5 | |
|---|---|---|---|---|---|
| SiO2 | 58.84 % | 59.79 % | 60.45 % | 59.37 % | 53.63 % |
| TiO2 | 0.02 % | 0.01 % | 0.03 % | 0.1 % | |
| Al2O3 | 8.21 % | 12.59 % | 7.7 % | 11.86 % | 3.04 % |
| Cr2O3 | 0.02 % | ||||
| MgO | 12.16 % | 8.39 % | 12.12 % | 7.32 % | 0.99 % |
| CaO | 0.02 % | 0.04 % | 0.03 % | 0.04 % | |
| MnO | 0.036 % | 0.17 % | 0.18 % | 0.37 % | |
| Fe2O3 | 5.83 % | 1.96 % | 9.68 % | 12.39 % | |
| FeO | 6.06 % | 12.00 % | 4.38 % | 15.14 % | 22.63 % |
| ZnO | 0.14 % | 0.02 % | |||
| Na2O | 0.37 % | 0.08 % | 1.12 % | 0.17 % | 0.35 % |
| K2O | 0.02 % | 0.54 % | 0.03 % | 0.03 % | |
| F | 0.40 % | 0.43 % | 0.07 % | 0.16 % | |
| Cl | 0.01 % | 0.01 % | |||
| Li2O | 3.58 % | 3.10 % | 2.13 % | 3.46 % | 3.26 % |
| H2O | 2.10 % | 1.75 % | 2.28 % | 2.19 % | 1.95 % |
| O=F/Cl | -0.13 % | ||||
| O=F | 0.07 % | ||||
| Total: | 97.686 % | 99.88 % | 100.83 % | 99.88 % | 99.01 % |
Empirical formulas:
| Sample ID | Empirical Formula |
|---|---|
| 1 | Na0.02(Li1.92Na0.08) 2(Mg2.32Fe2+0.62Mn2+0.06Zn2+0.01Li0.01Al1.30Fe3+0,68) 5.00Si8O22((OH1.87F0.13) 2 |
| 2 | (Li1.67Fe0.21Na0.02Mn0.02Ca0.01) 1.93 (Al1.99Mg1.68Fe2+1.13Fe3+0.20) 5.00 (Si8.02) O22 ((OH) 1.55O0.43) 2 |
| 3 | K0.09 (Li1.14Na0.29Fe0. 07) 1.50 (Mg2.40Al1.20 Fe3+0.97 Fe2+0.42) 5 Si8.04O22 ((OH) 1.84F0.16) 2 |
| 4 | A(K0.01Na0.01)B(Li1.88Mg0.08Na0.03Fe2+ 0.01) C(Al1.89Fe2+ 1.70Mg1.39Mn2+ 0.02) TSi8.00O22(OH1.97F0.03) |
| 5 | A(K0.01Na0.06)B0.07(Li1.95Na0.04Ca0.01)2.00C(Fe2+2.82Fe3+1.39Al0.51Mg0.22Mn2+0.05Ti0.01)T?5.00(Si7.98Al0.02)?8.00O22(OH)1.94F0.06 |
Sample references:
| ID | Type | Locality | Reference | Notes |
|---|---|---|---|---|
| 1 | Utö Mines, Utö, Haninge, Stockholm County, Sweden | X-ray analysis, structure refinement (SREF), Electron (EMP) and ion (SIMS) microprobe analysis for site population, structure and chemistry for the sample. | ||
| 2 | 1 | Greenbushes Mine, Greenbushes tinfield, Bridgetown-Greenbushes Shire, Western Australia, Australia | Thin sections as well as a polished mount were prepared and examined by optical, scanning electron microscopy (SEM) and electron microprobe. Determination of Li content was done by atomic absorption. | |
| 3 | Type Specimen | Utö Mines, Utö, Haninge, Stockholm County, Sweden | Wet chemical analysis. The results indicate the the analyzed Li content is too low, compare with Camara et al. (2005). | |
| 4 | Type Specimen | Greenbushes Mine, Greenbushes tinfield, Bridgetown-Greenbushes Shire, Western Australia, Australia | X-ray analysis, structure refinement (SREF), Electron (EMP) and ion (SIMS) microprobe analysis for site population, structure and chemistry for the sample. | |
| 5 | Type Specimen | Iwagi Island, Ochi District, Ehime Prefecture, Japan | Nagashima, Mariko, Imaoka, Teruyoshi, Kano, Takashi, Kimura, Jun-ichi, Chang, Qing, Matsumoto, Takashi (2022) Ferro-ferri-holmquistite, □Li2(Fe2+3Fe3+2)Si8O22(OH)2, Fe2+Fe3+ analogue of holmquistite, from the Iwagi islet, Ehime, Japan. European Journal of Mineralogy, 34 (5) 425-438 doi:10.5194/ejm-34-425-2022 | empirical formula, derived from EMPA and LAICPMS data, is based on Σ(C+T)=13. The FeO and Fe2O3 contents were calculated on a basis of charge neutralization. The average FeO content obtained by EMPA was 33.78 wt %. b The Li2O content was determined by LA-ICP-MS.. H2O content is calculated. |
Crystallography of Holmquistite Root Name Group
Crystal System:
Orthorhombic
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) |
|---|---|---|---|---|---|---|---|
| 0003812 | Ferro-holmquistite | Camara F, Oberti R (2005) The crystal-chemistry of holmquistites: Ferroholmquistite from Greenbushes (Western Australia) and hints for compositional constraints in B-Li amphiboles American Mineralogist 90 1167-1176 |  | 2005 | 0 | 293 | |
| 0003818 | Holmquistite | Camara F, Oberti R (2005) The crystal-chemistry of holmquistites: Ferroholmquistite from Greenbushes (Western Australia) and hints for compositional constraints in B-Li amphiboles American Mineralogist 90 1167-1176 | | 2005 | 0 | 293 | |
| 0003817 | Holmquistite | Camara F, Oberti R (2005) The crystal-chemistry of holmquistites: Ferroholmquistite from Greenbushes (Western Australia) and hints for compositional constraints in B-Li amphiboles American Mineralogist 90 1167-1176 | | 2005 | 0 | 293 | |
| 0003816 | Holmquistite | Camara F, Oberti R (2005) The crystal-chemistry of holmquistites: Ferroholmquistite from Greenbushes (Western Australia) and hints for compositional constraints in B-Li amphiboles American Mineralogist 90 1167-1176 | | 2005 | 0 | 293 | |
| 0003815 | Holmquistite | Camara F, Oberti R (2005) The crystal-chemistry of holmquistites: Ferroholmquistite from Greenbushes (Western Australia) and hints for compositional constraints in B-Li amphiboles American Mineralogist 90 1167-1176 | | 2005 | 0 | 293 | |
| 0003814 | Holmquistite | Camara F, Oberti R (2005) The crystal-chemistry of holmquistites: Ferroholmquistite from Greenbushes (Western Australia) and hints for compositional constraints in B-Li amphiboles American Mineralogist 90 1167-1176 | | 2005 | 0 | 293 | |
| 0003813 | Holmquistite | Camara F, Oberti R (2005) The crystal-chemistry of holmquistites: Ferroholmquistite from Greenbushes (Western Australia) and hints for compositional constraints in B-Li amphiboles American Mineralogist 90 1167-1176 | | 2005 | 0 | 293 |
CIF Raw Data - click here to close
Relationship of Holmquistite Root Name Group to other Species
Other Members of Lithium Amphibole Subgroup:
| Clino-holmquistite Root Name Group | ◻Li2(C2+3C3+2)(Si8O22)w2 | Mon. |
| Pedrizite Root Name Group | ALi2(LiC2+2C3+2)(Si8O22)W2 |
Holmquistite Root Name Group Members:
| Ferro-ferri-holmquistite | ◻Li2(Fe2+3Fe3+2)(Si8O22)(OH)2 | Orth. mmm(2/m2/m2/m) : Pmma |
| Ferro-holmquistite | ◻Li2(Fe2+3Al2)(Si8O22)(OH)2 | Orth. mmm(2/m2/m2/m) : Pnma |
| Holmquistite | ◻Li2(Mg3Al2)(Si8O22)(OH)2 | Orth. mmm(2/m2/m2/m) : Pnma |
Click on any node to view relationships. Formula-derived relationship network for the group members above. Use Find related species to add formula-neighbour species outside the current group view. Solid links show inferred chemical differences; dashed violet links show same-formula crystallographic differences. Hydration states are not treated as relationship changes. These relationships do not imply any real-world substitution reactions between these species.
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 Holmquistite Root Name Group
mindat.org URL:
https://www.mindat.org/min-8958.html
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References for Holmquistite Root Name Group
Reference List:
Osann, A. (1913) Über Holmquistit, einen Lithionglaukophan von der Insel Utö. Sitzungsberichte der Heidelberger Akademie der Wissenschaften, Mathematisch-Naturwissenschaftliche Klasse: Abteilung A, Mathematisch-physikalische Wissenschaften, Jahrgang 1913 23 doi:10.11588/diglit.37382#0001
Ishida, K., Hawthorne, F. C. (2003) Fine structure in the infrared OH-stretching bands of holmquistite and anthophyllite. Physics and Chemistry of Minerals, 30 (6) 330-336 doi:10.1007/s00269-003-0311-9
Spodumene prospect, Brandrücken, Frantschach-Sankt Gertraud, Wolfsberg District, Carinthia, Austria