Guarinoite
A valid IMA mineral species
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About Guarinoite
Formula:
Zn6(SO4)(OH)10 · 5H2O
Minor Co and Ni may replace Zn.
Colour:
Very pale pink, bright to deep pink.
Lustre:
Vitreous, Pearly
Hardness:
1½ - 2
Specific Gravity:
2.80
Crystal System:
Hexagonal
Member of:
Name:
Named in honor of André Guarino (1945– ), mineral collector from Toulon, France, who collected the first specimens.
Unique Identifiers
Mindat ID:
1765
Long-form identifier:
mindat:1:1:1765:3
Similar Names
Classification of Guarinoite
Gordaite-type sheet
Members of the namuwite group exhibit gordaite-type sheets. Guarinoite exhibits a modified version of the sheet topology with a higher ratio of M sites to T sites.
IMA Classification of Guarinoite
Approved
IMA Formula:
Zn2+6S6+O4(OH)10·5H2O
Approval year:
1991
First published:
1993
Approval history:
IMA1991-005
Type description reference:
7.DD.80
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
D : With only medium-sized cations; sheets of edge-sharing octahedra
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
D : With only medium-sized cations; sheets of edge-sharing octahedra
31.2.4.1
31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
2 : (AB)6(XO4)Zq·xH2O
31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
2 : (AB)6(XO4)Zq·xH2O
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 |
|---|---|---|
| Gua | 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 Guarinoite
Vitreous, Pearly
Transparency:
Transparent
Colour:
Very pale pink, bright to deep pink.
Streak:
Light pink
Hardness:
1½ - 2 on Mohs scale
Cleavage:
Perfect
{001}
{001}
Fracture:
Irregular/Uneven
Density:
2.80 g/cm3 (Measured) 2.77 g/cm3 (Calculated)
Optical Data of Guarinoite
Type:
Uniaxial (-)
RI values:
nω = 1.584 nε = 1.544
Max. Birefringence:
δ = 0.040
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:
Moderate
Pleochroism:
Strong
Comments:
O = pink, E = light pink
Chemistry of Guarinoite
Mindat Formula:
Zn6(SO4)(OH)10 · 5H2O
Minor Co and Ni may replace Zn.
Minor Co and Ni may replace Zn.
Element Weights:
Elements listed:
Crystallography of Guarinoite
Crystal System:
Hexagonal
Cell Parameters:
a = 8.344(2) Å, c = 21.59(2) Å
Ratio:
a:c = 1 : 2.587
Unit Cell V:
1,301.76 ų (Calculated from Unit Cell)
Z:
3
Morphology:
Tabular {001}
Comment:
Space group P63, P63/m or P6322.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 10.8 Å | (100) |
| 5.40 Å | (25) |
| 3.300 Å | (90) |
| 2.725 Å | (60) |
| 2.563 Å | (50) |
| 2.351 Å | (40) |
| 1.575 Å | (30) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47b : [Sulfates and sulfites] |
Type Occurrence of Guarinoite
General Appearance of Type Material:
Aggregates of hexagonal crystals.
Place of Conservation of Type Material:
Mineralogy Department, Natural History Museum, Geneva, Switzerland, 435/85.
Geological Setting of Type Material:
Secondary alteration mineral.
Associated Minerals at Type Locality:
Synonyms of Guarinoite
Other Language Names for Guarinoite
Relationship of Guarinoite to other Species
Member of:
Other Members of Namuwite Group:
| Bechererite | Zn7Cu(OH)13[(SiO(OH)3(SO4)] | Trig. 3 : P3 |
| Gordaite | NaZn4(SO4)(OH)6Cl · 6H2O | Trig. 3 : P3 |
| Hanahanite | [Zn8(OH)14(SO4)] · 3H2O | Hex. 6 : P63 |
| Haywoodite | [Pb(H2O)10][Zn12(OH)20(H2O)(SO4)3] | Tric. 1 : P1 |
| Hodgesmithite | (Cu,Zn)6Zn(SO4)2(OH)10 · 3H2O | Trig. 3 : P3 |
| Lahnsteinite | Zn4(SO4)(OH)6 · 3H2O | Tric. 1 : P1 |
| Namuwite | Zn4(SO4)(OH)6 · 4H2O | Trig. 3 : P3 |
| Osakaite | Zn4(SO4)(OH)6 · 5H2O | Tric. 1 : P1 |
| Ramsbeckite | (Cu,Zn)15(SO4)4(OH)22 · 6H2O | Mon. 2/m |
| Thérèsemagnanite | NaCo4(SO4)(OH)6Cl · 6H2O | Trig. 3 : P3 |
| Tzeferisite | CaZn8(SO4)2(OH)12Cl2(H2O)9 | Trig. 3m(32/m) : R3c |
Common Associates
Associations Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 7.DD. | Asagiite | NiCu4(SO4)2(OH)6 · 6H2O |
| 7.DD.05 | Felsőbányaite | Al4(SO4)(OH)10 · 4H2O |
| 7.DD.07 | Llantenesite | Cu6Al[SeO4](OH)12Cl · 3H2O |
| 7.DD.10 | Langite | Cu4(SO4)(OH)6 · 2H2O |
| 7.DD.10 | Fehrite | MgCu4(SO4)2(OH)6 · 6H2O |
| 7.DD.10 | Posnjakite | Cu4(SO4)(OH)6 · H2O |
| 7.DD.10 | Wroewolfeite | Cu4(SO4)(OH)6 · 2H2O |
| 7.DD.10 | Gobelinite | CoCu4(SO4)2(OH)6 · 6H2O |
| 7.DD.15 | Kobyashevite | Cu5(SO4)2(OH)6 · 4H2O |
| 7.DD.15 | Spangolite | Cu6Al(SO4)(OH)12Cl · 3H2O |
| 7.DD.15 | 'Unnamed (Dimorph of Devilline)' | CaCu4(SO4)2(OH)6 · 3H2O |
| 7.DD.20 | Ktenasite | ZnCu4(SO4)2(OH)6 · 6H2O |
| 7.DD.25 | Christelite | Cu2Zn3(SO4)2(OH)6 · 4H2O |
| 7.DD.30 | Edwardsite | Cu3Cd2(SO4)2(OH)6 · 4H2O |
| 7.DD.30 | Niedermayrite | CdCu4(SO4)2(OH)6 · 4H2O |
| 7.DD.30 | Serpierite | Ca(Cu2+,Zn2+)4(S6+O4)2(OH)6 · 3H2O |
| 7.DD.30 | Campigliaite | Mn2+Cu4(SO4)2(OH)6 · 4H2O |
| 7.DD.30 | Orthoserpierite | Ca(Cu,Zn)4(SO4)2(OH)6 · 3H2O |
| 7.DD.30 | Devilline | CaCu4(SO4)2(OH)6 · 3H2O |
| 7.DD.35 | Shigaite | Mn6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2O |
| 7.DD.35 | Zincaluminite | (Zn1-xAlx)(SO4)x/2(OH)2 · nH2O |
| 7.DD.35 | Zincowoodwardite | Zn1-xAlx(OH)2[SO4]x/2 · nH2O |
| 7.DD.35 | Natroglaucocerinite | Zn6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2O |
| 7.DD.35 | Hydrowoodwardite | (Cu1-xAlx)(OH)2[SO4]x/2 · nH2O |
| 7.DD.35 | Honessite | (Ni1-xFe3+x)(OH)2[SO4]x/2 · nH2O |
| 7.DD.35 | Carrboydite | (Ni1-xAlx)(SO4)x/2(OH)2 · nH2O |
| 7.DD.35 | Glaucocerinite | (Zn1-xAlx)(OH)2(SO4)x/2 · nH2O |
| 7.DD.35 | Wermlandite | Mg7Al2(OH)18[Ca(H2O)6][SO4]2 · 6H2O |
| 7.DD.35 | Nikischerite | Fe2+6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2O |
| 7.DD.35 | Hydrohonessite | (Ni1-xFe3+x)(OH)2(SO4)x/2 · nH2O |
| 7.DD.35 | Woodwardite | Cu1-xAlx(OH)2(SO4)x/2 · nH2O |
| 7.DD.35 | Motukoreaite | Mg6Al3(OH)18[Na(H2O)6][SO4]2 · 6H2O |
| 7.DD.35 | Mountkeithite | [(Mg1-xFe3+x)(OH)2][SO4]x/2 · nH2O |
| 7.DD.40 | Lawsonbauerite | (Mn2+,Mg)9Zn4(SO4)2(OH)22 · 8H2O |
| 7.DD.40 | Torreyite | (Mg,Mn2+)7◻2Mn2+2Zn4(SO4)2(OH)22 · 8H2O |
| 7.DD.40 | Isselite | Cu6(SO4)(OH)10(H2O)4 · H2O |
| 7.DD.45 | Mooreite | Mg9◻2Mn2Zn4(SO4)2(OH)26 · 8H2O |
| 7.DD.45 | Hodgesmithite | (Cu,Zn)6Zn(SO4)2(OH)10 · 3H2O |
| 7.DD.47 | Lahnsteinite | Zn4(SO4)(OH)6 · 3H2O |
| 7.DD.50 | Namuwite | Zn4(SO4)(OH)6 · 4H2O |
| 7.DD.50 | Minohlite | (Cu,Zn)7(SO4)2(OH)10 · 8H2O |
| 7.DD.52 | Lauraniite | Cu6Cd2(SO4)2(OH)12 · 5H2O |
| 7.DD.55 | Bechererite | Zn7Cu(OH)13[(SiO(OH)3(SO4)] |
| 7.DD.60 | Ramsbeckite | (Cu,Zn)15(SO4)4(OH)22 · 6H2O |
| 7.DD.65 | Vonbezingite | Ca6Cu3(SO4)3(OH)12 · 2H2O |
| 7.DD.70 | Redgillite | Cu6(SO4)(OH)10 · H2O |
| 7.DD.75 | Nickelalumite | NiAl4(SO4)(OH)12(H2O)3 |
| 7.DD.75 | Kyrgyzstanite | ZnAl4(SO4)(OH)12 · 3H2O |
| 7.DD.75 | Chalcoalumite | CuAl4(SO4)(OH)12 · 3H2O |
| 7.DD.80 | Schulenbergite | (Cu,Zn)7(SO4)2(OH)10 · 3H2O |
| 7.DD.80 | 'UM1992-30-SO:CCuHZn' | (Zn,Cu)7(SO4,CO3)2(OH)10 · 3H2O |
| 7.DD.80 | Thérèsemagnanite | NaCo4(SO4)(OH)6Cl · 6H2O |
| 7.DD.85 | Montetrisaite | Cu6(SO4)(OH)10 · 2H2O |
Fluorescence of Guarinoite
Not fluorescent
Other Information
Notes:
Soluble in HCl
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 Guarinoite
mindat.org URL:
https://www.mindat.org/min-1765.html
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Please feel free to link to this page.
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References for Guarinoite
Localities for Guarinoite
Showing 4 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.
France (TL) | |
| Archives des Sciences Genève (1993) +2 other references |
| Favreau et al. (2024) | |
USA | |
| Analyzed by SEM EDS and in the ... +1 other reference |
| Analyzed by Joy Desor. |
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Cap Garonne Mine, Le Pradet, Toulon, Var, Provence-Alpes-Côte d'Azur, France