Magnesiokoritnigite
A valid IMA mineral species
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About Magnesiokoritnigite
Formula:
Mg(AsO3OH) · H2O
Colour:
Colourless to pale-pink
Lustre:
Vitreous
Hardness:
3
Specific Gravity:
2.95
Crystal System:
Triclinic
Member of:
Name:
The magnesium analogue of Koritnigite
Type Locality:
Isostructural with:
This page provides mineralogical data about Magnesiokoritnigite.
Unique Identifiers
Mindat ID:
43924
Long-form identifier:
mindat:1:1:43924:4
GUID
(UUID V4):
(UUID V4):
ddcbb5fd-2dee-4b71-90de-9fd55284c7be
IMA Classification of Magnesiokoritnigite
Approved
Approval year:
2013
First published:
2013
Classification of Magnesiokoritnigite
8.CB.20
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
B : With only medium-sized cations, RO4:H2O = 1:1
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
B : With only medium-sized cations, RO4:H2O = 1:1
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 |
---|---|---|
Mkor | 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 Magnesiokoritnigite
Vitreous
Transparency:
Transparent
Colour:
Colourless to pale-pink
Comment:
The crystals also occur in dense deep-pink intergrowths
Streak:
White
Hardness:
3 on Mohs scale
Comment:
~3
Tenacity:
Brittle
Cleavage:
Perfect
on {101}
on {101}
Fracture:
Conchoidal
Density:
2.95(3) g/cm3 (Measured) 2.935 g/cm3 (Calculated)
Optical Data of Magnesiokoritnigite
Type:
Biaxial (+)
RI values:
nα = 1.579(1) nβ = 1.586(1) nγ = 1.620(1)
2V:
Measured: 50° (2), Calculated: 50°
Max Birefringence:
δ = 0.041
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:
Moderate
Dispersion:
r < v, medium
Pleochroism:
Non-pleochroic
Chemistry of Magnesiokoritnigite
Mindat Formula:
Mg(AsO3OH) · H2O
Elements listed:
Crystallography of Magnesiokoritnigite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 7.8702(7) Å, b = 15.8081(6) Å, c = 6.6389(14) Å
α = 90.814(6)°, β = 96.193(6)°, γ = 90.094(7)°
α = 90.814(6)°, β = 96.193(6)°, γ = 90.094(7)°
Ratio:
a:b:c = 0.498 : 1 : 0.42
Unit Cell V:
821.06 ų
Z:
8
Morphology:
Thin to thick laths up to 2 mm long. Laths are elongated on [001], flattened on {010} and exhibit the forms {010}, {110}, {11İ0}, {101}, {031} and {03İ1}.
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
7.96 Å | (100) |
4.80 Å | (54) |
3.791 Å | (85) |
3.242 Å | (56) |
3.157 Å | (92) |
3.021 Å | (61) |
2.798 Å | (51) |
1.908 Å | (43) |
Comments:
From 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] | |
47d : [Arsenates, antimonates, selenates, bismuthinates] |
Type Occurrence of Magnesiokoritnigite
General Appearance of Type Material:
thin to thick laths up to 2 mm long
Place of Conservation of Type Material:
Type material is deposited in the collections of the Natural History Museum of Los Angeles County, Los Angeles, California, USA, catalogue numbers 64057, 64058 and 64059
Geological Setting of Type Material:
Formed from the oxidation of native arsenic and other As-bearing primary phases, followed by later alteration by saline fluids derived from evaporating meteoric water under hyperarid conditions
Associated Minerals at Type Locality:
Reference:
Kampf, A.R., Nash, B.P., Dini, M., Molina Donoso, A.A. (2013) Magnesiokoritnigite, Mg(AsO3OH)•H2O, from the Torrecillas mine, Iquique Province, Chile: the Mg-analogue of koritnigite. Mineralogical Magazine: 77: 3081-3092.
Synonyms of Magnesiokoritnigite
Other Language Names for Magnesiokoritnigite
German:Magnesiokoritnigit
Relationship of Magnesiokoritnigite to other Species
Member of:
Other Members of this group:
Cobaltkoritnigite | Co(AsO3OH) · H2O | Tric. 1 : P1 |
Koritnigite | Zn(AsO3OH) · H2O | Tric. 1 : P1 |
Common Associates
Associated Minerals Based on Photo Data:
16 photos of Magnesiokoritnigite associated with Lavendulan | NaCaCu5(AsO4)4Cl · 5H2O |
12 photos of Magnesiokoritnigite associated with Canutite | NaMn3[AsO4][AsO3(OH)]2 |
4 photos of Magnesiokoritnigite associated with Gypsum | CaSO4 · 2H2O |
3 photos of Magnesiokoritnigite associated with Currierite | Na4Ca3MgAl4(AsO3OH)12 · 9H2O |
2 photos of Magnesiokoritnigite associated with Torrecillasite | Na(As,Sb)3+4O6Cl |
2 photos of Magnesiokoritnigite associated with Tamarugite | NaAl(SO4)2 · 6H2O |
1 photo of Magnesiokoritnigite associated with Halite | NaCl |
1 photo of Magnesiokoritnigite associated with Magnesiocanutite | NaMnMg2[AsO4]2[AsO2(OH)2] |
Related Minerals - Strunz-mindat Grouping
8.CB. | Krupičkaite | Cu6[AsO3(OH)]6 · 8H2O |
8.CB. | Ermeloite | Al(PO4) · H2O |
8.CB.05 | Serrabrancaite | MnPO4 · H2O |
8.CB.10 | Hureaulite | Mn2+5(PO3OH)2(PO4)2 · 4H2O |
8.CB.10 | Villyaellenite | MnMn2Ca2(AsO4)2(HAsO4)2 · 4H2O |
8.CB.10 | UM1997-09-AsO:CaHMgZn | (Mg,Ca,Zn)5(AsO4)2(HAsO4)2 · 4H2O |
8.CB.10 | Nyholmite | Cd3Zn2(AsO4)2(HAsO4)2 · 4H2O |
8.CB.10 | Miguelromeroite | MnMn2Mn2(AsO4)2(HAsO4)2 · 4H2O |
8.CB.10 | Giftgrubeite | CaMn2Ca2(AsO4)2(AsO3OH)2 · 4H2O |
8.CB.15 | Krautite | Mn(HAsO4) · H2O |
8.CB.20 | Cobaltkoritnigite | Co(AsO3OH) · H2O |
8.CB.20 | Koritnigite | Zn(AsO3OH) · H2O |
8.CB.25 | Yvonite | Cu(HAsO4) · 2H2O |
8.CB.30 | Geminite | Cu2+(AsO3OH) · H2O |
8.CB.35 | Schubnelite | Fe3+VO4 · H2O |
8.CB.40 | Radovanite | Cu2Fe3+(AsO4)(HAs3+O3)2 · H2O |
8.CB.45 | Kazakhstanite | Fe3+5V4+3V5+12O39(OH)9 · 9H2O |
8.CB.50 | Kolovratite | NixZny(VO4)0.67(x+y) · nH2O |
8.CB.60 | Burgessite | Co2(H2O)4[AsO3(OH)]2(H2O) |
8.CB.60 | Honzaite | Ni2(AsO3OH)2 · 5H2O |
8.CB.65 | Cardite | Zn5.5(AsO4)2(AsO3OH)(OH)3 · 3H2O |
Other Information
Notes:
The mineral is slowly soluble in concentrated HCl or HNO3 and very slowly soluble in concentrated H2SO4.
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 Magnesiokoritnigite
mindat.org URL:
https://www.mindat.org/min-43924.html
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References for Magnesiokoritnigite
Reference List:
Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2013) New minerals and nomenclature modifications approved in 2013. CNMNC Newsletter No.17. Mineralogical Magazine, 77 (7) 2997-3005 doi:10.1180/minmag.2013.077.7.09
Localities for Magnesiokoritnigite
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.
Chile (TL) | |
| Williams et al. (2013) +3 other references |
Greece | |
| Rieck et al. (2018) |
Quick NavTopAbout MagnesiokoritnigiteUnique 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
Torrecillas mine, Iquique Province, Tarapacá, Chile