Redgillite
A valid IMA mineral species
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About Redgillite
Formula:
Cu6(SO4)(OH)10 · H2O
Colour:
Pale green, grass green, emerald green, nickel green
Lustre:
Vitreous
Hardness:
2
Specific Gravity:
3.45
Crystal System:
Monoclinic
Name:
For its first noted occurrence at the Red Gill Mine (but not the type locality). The photo at right shows the mine that the mineral is named after, rather than the type locality.
Unique Identifiers
Mindat ID:
10349
Long-form identifier:
mindat:1:1:10349:1
IMA Classification of Redgillite
Classification of Redgillite
7.DD.70
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
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 |
|---|---|---|
| Rgl | 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 Redgillite
Vitreous
Transparency:
Transparent, Translucent
Colour:
Pale green, grass green, emerald green, nickel green
Streak:
White
Hardness:
2 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
On {001}, good on {100} and {010}.
On {001}, good on {100} and {010}.
Fracture:
Irregular/Uneven
Comment:
Brittle, slightly flexible, non-elastic.
Density:
3.45(5) g/cm3 (Measured) 3.450 g/cm3 (Calculated)
Optical Data of Redgillite
Type:
Biaxial (-)
RI values:
nα = 1.693 nβ = 1.721 nγ = 1.723
2V:
Measured: 30° (2), Calculated: 30°
Max. Birefringence:
δ = 0.030
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:
Very High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Interference Figure:
This shows the idealized biaxial acute bisectrix (Bxa) interference figure
- the conoscopic view for a grain cut perpendicular to the acute bisectrix, using
this mineral's 2V. The two small white dots mark the melatopes - the points
where the two optic axes emerge - and are shown only when they fall within the
field of view. The coloured bands are isochromatics, and the dark bands are
isogyres.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Dispersion:
r > v, medium
Optical Extinction:
X ≈ c, Y = b, Z ≈ a.
Pleochroism:
Strong
Comments:
X = Y = blue-green, Z = yellow-green.
Comments:
Absorption: Y > X > Z.
Chemistry of Redgillite
Mindat Formula:
Cu6(SO4)(OH)10 · H2O
Element Weights:
Elements listed:
Crystallography of Redgillite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Cell Parameters:
a = 3.155 Å, b = 10.441 Å, c = 19.436 Å
β = 90.089°
β = 90.089°
Ratio:
a:b:c = 0.302 : 1 : 1.862
Unit Cell V:
640.2 ų
Z:
2
Morphology:
Bladed crystals with squared-off or tapering terminations; usually in radiating groups.
Type material: Forms observed are {001} prominent, {010} as composite stepped faces, and {100} irregular.
Type material: Forms observed are {001} prominent, {010} as composite stepped faces, and {100} irregular.
Twinning:
Rarely on (001) (Schnorrer et al., 2006)
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 9.72 Å | (90) |
| 7.11 Å | (100) |
| 4.60 Å | (30) |
| 4.068 Å | (20) |
| 2.880 Å | (30) |
| 2.318 Å | (50) |
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 Redgillite
General Appearance of Type Material:
Bladed crystals up to 0.15 mm long with squared-off or tapering terminations; usually in radiating groups.
Place of Conservation of Type Material:
Manchester Museum, The University of Manchester, England, MANCH:18024.
Geological Setting of Type Material:
In thin fractures in partly oxidized copper sulphides, probably dump-formed.
Associated Minerals at Type Locality:
Synonyms of Redgillite
Other Language Names for Redgillite
Common Associates
Associations Based on Photo Data:
| 23 photos of Redgillite associated with Langite | Cu4(SO4)(OH)6 · 2H2O |
| 11 photos of Redgillite associated with Montetrisaite | Cu6(SO4)(OH)10 · 2H2O |
| 8 photos of Redgillite associated with Susannite | Pb4(CO3)2(SO4)(OH)2 |
| 7 photos of Redgillite associated with Hemimorphite | Zn4Si2O7(OH)2 · H2O |
| 6 photos of Redgillite associated with Cuprite | Cu2O |
| 5 photos of Redgillite associated with Pyromorphite | Pb5(PO4)3Cl |
| 5 photos of Redgillite associated with Linarite | PbCu(SO4)(OH)2 |
| 5 photos of Redgillite associated with Serpierite | Ca(Cu2+,Zn2+)4(S6+O4)2(OH)6 · 3H2O |
| 4 photos of Redgillite associated with Chalcopyrite | CuFeS2 |
| 4 photos of Redgillite associated with Cerussite | PbCO3 |
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.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.80 | Guarinoite | Zn6(SO4)(OH)10 · 5H2O |
| 7.DD.85 | Montetrisaite | Cu6(SO4)(OH)10 · 2H2O |
Other Information
Notes:
Dissolves slowly in dilute 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 Redgillite
mindat.org URL:
https://www.mindat.org/min-10349.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 Redgillite
Localities for Redgillite
Showing 54 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.
Austria | |
| Kolitsch et al. (2011) |
Bolivia | |
| Cacho et al. (2019) |
| Färber (n.d.) | |
Germany | |
| Markus Gerstmann - Collection +1 other reference |
| Schnorrer et al. (2006) |
| Schnorrer et al. (2006) |
| Schnorrer et al. (2006) | |
| Schnorrer et al. (2006) |
| Schnorrer et al. (2006) |
| Schnorrer et al. (2006) |
| Schnorrer et al. (2006) |
| Schnorrer et al. (2006) |
| Henrich et al. (2017) |
| Schnorrer et al. (2006) |
Greece | |
| Rieck et al. (2018) |
| Branko Rieck collection and ... |
Ireland | |
| Pluth et al. (2005) |
| Moreton et al. (2007) |
Italy | |
| Corrado Balestra collection |
| Bortolozzi (n.d.) |
| Bortolozzi (n.d.) |
| Bortolozzi (n.d.) | |
| Bortolozzi (n.d.) |
| Bortolozzi (n.d.) |
| Bortolozzi et al. (2021) |
| Pegoraro et al. (2009) +1 other reference |
| Pegoraro S. et al. (2009) | |
| Bortolozzi (n.d.) | |
Romania | |
| In the collection of Stephan Wolfsried. ... |
Russia | |
| Pekov et al. (2011) |
UK | |
| Betterton (2000) +1 other reference |
| |
| Steve Rust collection | |
| Green et al. (2008) |
| Cooper et al. (1990) +2 other references | |
| Cooper et al. (1990) +2 other references |
| Steve Rust collection |
| Rust (2022) |
| S. Rust collection. | |
| S.Rust Collection |
| Ex-S Rust collection |
| S. Rust collection +1 other reference |
| S Rust collection +1 other reference | |
| Ex-S Rust collection |
| S.Rust Collection |
| Ex-S Rust collection |
| S. Rust collection +1 other reference |
| S. Rust collection +1 other reference | |
| S. Rust collection +1 other reference | |
| S.Rust Collection |
| Green et al. (1996) +2 other references |
| Ex-S Rust collection |
| Ex-S Rust collection |
USA | |
| A. Kampf 2-2018 |
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Frongoch Mine, Pontrhydygroes, Upper Llanfihangell-y-Creuddyn, Ceredigion, Wales, UK