Garyansellite
A valid IMA mineral species
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About Garyansellite
Formula:
(Mg,Fe)3(PO4)2(OH,O) · 1.5H2O
Colour:
clove-brown
Lustre:
Vitreous
Hardness:
4
Specific Gravity:
3.16
Crystal System:
Orthorhombic
Member of:
Name:
Named in 1984 by Bozidar Darko Sturman and Pete J. Dunn in honor of Harold Gary Ansell (1943 - ), mineralogist with the Canadian Geological Survey. He was curator of the National Mineral Collection from 1972-1997.
Type Locality:
Isostructural with:
Forms a series with kryzhanovskite. Structurally close to other members of the phosphoferrite–reddingite series (or phosphoferrite group).
Small (<1 mm) nearly colorless, zones, fringes, or patches in olive phosphosiderite.
The structure is layered, with layers comprising chains formed by edge-sharing M(2)O4(OH)(H2O) octahedra; these octahedra form dimers and these share edges with separate M(1)O4(H2O)2 octahedra. The chains are linked to layers through the common vertices of M(2); octahedra and octaahedral layers are connected via the phosphate tetrahedra.
Small (<1 mm) nearly colorless, zones, fringes, or patches in olive phosphosiderite.
The structure is layered, with layers comprising chains formed by edge-sharing M(2)O4(OH)(H2O) octahedra; these octahedra form dimers and these share edges with separate M(1)O4(H2O)2 octahedra. The chains are linked to layers through the common vertices of M(2); octahedra and octaahedral layers are connected via the phosphate tetrahedra.
Unique Identifiers
Mindat ID:
1655
Long-form identifier:
mindat:1:1:1655:7
GUID
(UUID V4):
(UUID V4):
c178c62a-c2fb-4da0-934b-2b9e68a31c53
IMA Classification of Garyansellite
Classification of Garyansellite
8.CC.05
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
C : With only medium-sized cations, RO4:H2O = 1:1.5
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
C : With only medium-sized cations, RO4:H2O = 1:1.5
40.3.2.5
40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
3 : A3(XO4)2·xH2O
40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
3 : A3(XO4)2·xH2O
19.14.12
19 : Phosphates
14 : Phosphates of Fe and other metals
19 : Phosphates
14 : Phosphates of Fe and other metals
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 |
---|---|---|
Gas | 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 Garyansellite
Vitreous
Transparency:
Transparent
Comment:
"bronze on cleavages"
Colour:
clove-brown
Comment:
semitransparent
Streak:
brown
Hardness:
4 on Mohs scale
Cleavage:
Distinct/Good
{001}
{001}
Density:
3.16(4) g/cm3 (Measured) 3.154 g/cm3 (Calculated)
Optical Data of Garyansellite
Type:
Biaxial (-)
RI values:
nα = 1.733 nβ = 1.757 nγ = 1.761
2V:
Measured: 55° , Calculated: 42°
Max Birefringence:
δ = 0.028
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r < v
Comments:
reddish brown (X=Z), yellow (Y)
Comments:
Orientation: X = b, Y = a, Z = c; absorption: Z = X > Y
Chemistry of Garyansellite
Mindat Formula:
(Mg,Fe)3(PO4)2(OH,O) · 1.5H2O
Common Impurities:
Mn
Crystallography of Garyansellite
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:
a = 9.45 Å, b = 9.89 Å, c = 8.19 Å
Ratio:
a:b:c = 0.956 : 1 : 0.828
Unit Cell V:
765.44 ų (Calculated from Unit Cell)
Comment:
Space group is Pbna; parameters from Zubkova et al. (2016): a=9.44738, b=9.85976, c=8.14154, V=758.38
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.156 Å | (100) |
2.705 Å | (60) |
4.93 Å | (50) |
3.098 Å | (40) |
4.26 Å | (30) |
2.535 Å | (30) |
2.213 Å | (30) |
Comments:
Rapid Creek, Yukon, Canada. Data from the type description.
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 7: Great Oxidation Event | <2.4 |
47a : [Near-surface hydration of prior minerals] | |
47c : [Carbonates, phosphates, borates, nitrates] | |
47e : [Vanadates, chromates, manganates] |
Type Occurrence of Garyansellite
General Appearance of Type Material:
Small colorless patches
Place of Conservation of Type Material:
Royal Ontario Museum, Toronto, Canada (registration no. M37306)
Geological Setting of Type Material:
fractures in a sedimentary iron formation; rare, low-temperature species
Associated Minerals at Type Locality:
Synonyms of Garyansellite
Other Language Names for Garyansellite
German:Garyansellit
Spanish:Garyansellita
Relationship of Garyansellite to other Species
Member of:
Other Members of this group:
Correianevesite | Fe2+Mn2+2(PO4)2 · 3H2O | Orth. mmm (2/m 2/m 2/m) |
Kryzhanovskite | (Fe3+,Mn2+)3(PO4)2(OH,H2O)3 | Orth. mmm (2/m 2/m 2/m) |
Landesite | Mn2+3-xFe3+x(PO4)2(OH)x · (3-x)H2O | Orth. mmm (2/m 2/m 2/m) |
Phosphoferrite | (Fe2+,Mn2+)3(PO4)2 · 3H2O | Orth. mmm (2/m 2/m 2/m) : Pmna |
Reddingite | (Mn2+,Fe2+)3(PO4)2 · 3H2O | Orth. mmm (2/m 2/m 2/m) : Pmna |
Forms a series with:
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
8.CC. | Correianevesite | Fe2+Mn2+2(PO4)2 · 3H2O |
8.CC.05 | Kryzhanovskite | (Fe3+,Mn2+)3(PO4)2(OH,H2O)3 |
8.CC.05 | Landesite | Mn2+3-xFe3+x(PO4)2(OH)x · (3-x)H2O |
8.CC.05 | Phosphoferrite | (Fe2+,Mn2+)3(PO4)2 · 3H2O |
8.CC.05 | Reddingite | (Mn2+,Fe2+)3(PO4)2 · 3H2O |
8.CC.10 | Kaatialaite | Fe(H2AsO4)3 · 5H2O |
8.CC.15 | Leogangite | Cu10(AsO4)4(SO4)(OH)6 · 8H2O |
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 Garyansellite
mindat.org URL:
https://www.mindat.org/min-1655.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
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References for Garyansellite
Reference List:
Sturman, B. Darko, Dunn, Pete J. (1984) Garyansellite, a new mineral from Yukon Territory, Canada. American Mineralogist, 69 (1-2) 207-209
Anthony, John W., Bideaux, Richard A., Bladh, Kenneth W., Nichols, Monte C. - Eds. (2016) Handbook of Mineralogy. https://www.handbookofmineralogy.org/
Localities for Garyansellite
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).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
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Quick NavTopAbout GaryanselliteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesRelationshipsCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Rapid Creek, Dawson mining district, Yukon, Canada