IMPORTANT MESSAGE. We need your support now to keep mindat.org running. Click here to find out why.
Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for Educators
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
StatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Magnesiokoritnigite

This page is currently not sponsored. Click here to sponsor this page.
Hide all sections | Show all sections

About MagnesiokoritnigiteHide

Formula:
Mg(AsO3OH)·H2O
Colour:
Colourless to pale-pink
Lustre:
Vitreous
Hardness:
3
Specific Gravity:
2.95
Crystal System:
Triclinic
Name:
The magnesium analogue of Koritnigite
Isostructural with:
This page provides mineralogical data about Magnesiokoritnigite.


Classification of MagnesiokoritnigiteHide

Approved
Approval Year:
2013

Physical Properties of MagnesiokoritnigiteHide

Vitreous
Transparency:
Transparent
Colour:
Colourless to pale-pink
Comment:
The crystals also occur in dense deep-pink intergrowths
Streak:
White
Hardness:
Comment:
~3
Tenacity:
Brittle
Cleavage:
Perfect
on {101}
Fracture:
Conchoidal
Density:
2.95(3) g/cm3 (Measured)    2.935 g/cm3 (Calculated)

Optical Data of MagnesiokoritnigiteHide

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.
Surface Relief:
Moderate
Dispersion:
r < v, medium
Pleochroism:
Non-pleochroic

Chemical Properties of MagnesiokoritnigiteHide

Formula:
Mg(AsO3OH)·H2O
IMA Formula:
Mg(AsO3OH) · H2O

Crystallography of MagnesiokoritnigiteHide

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)°
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 DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.96(100)
4.80(54)
3.791(85)
3.242(56)
3.157(92)
3.021(61)
2.798(51)
1.908(43)
Comments:
From Type Description.

Type Occurrence of MagnesiokoritnigiteHide

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:

Synonyms of MagnesiokoritnigiteHide

Relationship of Magnesiokoritnigite to other SpeciesHide

Other Members of this group:
Cobaltkoritnigite(Co,Zn)(HAsO4) · H2OTric. 1 : P1
KoritnigiteZn(HAsO4) · H2OTric. 1 : P1

Common AssociatesHide

Associated Minerals Based on Photo Data:
Canutite8 photos of Magnesiokoritnigite associated with Canutite on mindat.org.
Lavendulan7 photos of Magnesiokoritnigite associated with Lavendulan on mindat.org.
Torrecillasite2 photos of Magnesiokoritnigite associated with Torrecillasite on mindat.org.
Tamarugite2 photos of Magnesiokoritnigite associated with Tamarugite on mindat.org.
Gypsum2 photos of Magnesiokoritnigite associated with Gypsum on mindat.org.
Halite1 photo of Magnesiokoritnigite associated with Halite on mindat.org.

Other InformationHide

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.

References for MagnesiokoritnigiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Kampf, A.R., Nash, B. and Dini, M. (2013) Magnesiokoritnigite, IMA 2013-049. CNMNC Newsletter No. 17, October 2013, page 3001; Mineralogical Magazine, 77, 2997-3005.
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.

Internet Links for MagnesiokoritnigiteHide

Localities for MagnesiokoritnigiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Chile (TL)
 
  • Tarapacá Region
    • Iquique Province
      • Salar Grande
Kampf, A.R., Nash, B. and Dini, M. (2013) Magnesiokoritnigite, IMA 2013-049. CNMNC Newsletter No. 17, October 2013, page 3001; Mineralogical Magazine, 77, 2997-3005; 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.
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium; Lavreotiki Municipality)
      • Lavrion District Mines
        • Plaka
          • Plaka Mines
Rieck, B., Kolitsch, U., Voudouris, P., Giester, G. and Tzeferis, P. (2018): Weitere Neufunde aus Lavrion, Griechenland. Mineralien-Welt 29 (5), 32-77 (in German).
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2018, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: October 16, 2018 13:06:24 Page generated: October 14, 2018 01:29:31
Go to top of page