Log InRegister
Quick Links : The Mindat ManualThe Rock H. Currier Digital LibraryMindat Newsletter [Free Download]
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 EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic Time
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
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral Quiz
Photo SearchPhoto GalleriesSearch by ColorNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Guyanaite

A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
Hide all sections | Show all sections

About GuyanaiteHide

05900390015032762145425.jpg
Flag of Guyana
Formula:
CrO(OH)
Colour:
Reddish brown, golden brown, greenish brown, green,
Specific Gravity:
4.67 (Calculated)
Crystal System:
Orthorhombic
Name:
Named in 1967 by Charles Milton, Daniel E. Appleman, Edward Ching-Te Chao, Frank Cuttita, Joseph I. Dinnin, Edward J. Dwornik, Margaret Hall, Blanche L. Ingram, and Harry J. Rose, Jr. for the country where the mineral was first found: Guyana / Guiana.
The β phase of CrO(OH). As with other Cr mineral species from the Merume River locality, such as bracewellite, grimaldiite, and mcconnellite, this species is NOT universally present in every specimen and verification of each specimen is required.

A nanophase Fe analogue is known as 'proto-goethite'.


Unique IdentifiersHide

Mindat ID:
1783
Long-form identifier:
mindat:1:1:1783:7
GUID
(UUID V4):
1c2db24f-1d53-4e99-bc89-c51167da5efb

Classification of GuyanaiteHide

Approved
4.FD.10

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
D : Hydroxides with OH, without H2O; chains of edge-sharing octahedra
6.1.2.3

6 : HYDROXIDES AND OXIDES CONTAINING HYDROXYL
1 : XO(OH)
7.14.4

7 : Oxides and Hydroxides
14 : Oxides of Cr

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
GuyIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Pronunciation of GuyanaiteHide

Pronunciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of GuyanaiteHide

Transparency:
Translucent
Colour:
Reddish brown, golden brown, greenish brown, green,
Comment:
probably variable with particle size and degree of oxidation;
Streak:
Yellow-brown, greenish brown
Density:
4.67(14) g/cm3 (Calculated)

Optical Data of GuyanaiteHide

Type:
Biaxial
Dispersion:
r > v extreme
Colour in reflected light:
gray with greenish tint
Internal Reflections:
strong red to yellowish brown
Pleochroism:
Weak
Comments:
brown colours

Chemical Properties of GuyanaiteHide

Formula:
CrO(OH)
Common Impurities:
Fe,Al,V

Crystallography of GuyanaiteHide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:
a = 4.860(3) Å, b = 4.305(10) Å, c = 2.954(4) Å
Ratio:
a:b:c = 1.129 : 1 : 0.686
Unit Cell V:
61.80 ų (Calculated from Unit Cell)
Z:
2
Comment:
Space group is P21nm or Pnnm (LP phase); HP phase: Pnnm

Crystal StructureHide

Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File    Best | x | y | z | a | b | c
Rotation
Stop | Start
Labels
Console Off | On | Grey | Yellow
IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0019391GuyanaiteJahn S, Wunder B, Koch-Muller M, Tarrieu L, Pohle M, Watenphul A, Taran M N (2012) Pressure-induced hydrogen bond symmetrisation in guyanaite, B-CrOOH: evidence from spectroscopy and ab initio simulations European Journal of Mineralogy 24 839-8502012synthetic at 4.0 GPa and 600 deg C for 24 hours0293
0019392GuyanaiteJahn S, Wunder B, Koch-Muller M, Tarrieu L, Pohle M, Watenphul A, Taran M N (2012) Pressure-induced hydrogen bond symmetrisation in guyanaite, B-CrOOH: evidence from spectroscopy and ab initio simulations European Journal of Mineralogy 24 839-8502012synthetic at 4.0 GPa and 600 deg C for 24 hours0293
0019393GuyanaiteJahn S, Wunder B, Koch-Muller M, Tarrieu L, Pohle M, Watenphul A, Taran M N (2012) Pressure-induced hydrogen bond symmetrisation in guyanaite, B-CrOOH: evidence from spectroscopy and ab initio simulations European Journal of Mineralogy 24 839-8502012synthetic at 4.0 GPa and 600 deg C for 24 hours0293
0013338GuyanaiteChristensen N, Hansen P, Lehmann M S (1976) Isotope effects in the bonds of beta-CrOOH and beta-CrOOD Journal of Solid State Chemistry 19 299-3041976synthetic0293
0013339GuyanaiteChristensen N, Hansen P, Lehmann M S (1976) Isotope effects in the bonds of beta-CrOOH and beta-CrOOD Journal of Solid State Chemistry 19 299-3041976synthetic0293
0013340GuyanaiteChristensen N, Hansen P, Lehmann M S (1976) Isotope effects in the bonds of beta-CrOOH and beta-CrOOD Journal of Solid State Chemistry 19 299-3041976synthetic0293
0013341GuyanaiteChristensen N, Hansen P, Lehmann M S (1976) Isotope effects in the bonds of beta-CrOOH and beta-CrOOD Journal of Solid State Chemistry 19 299-3041976synthetic0293
0016633GuyanaitePernet M, Berthet-Colominas C, Alario-Franco M, Christensen A (1977) Etude par diffraction neutronique de l'oxyhydroxyde de chrome beta-CrO OH _cod_database_code 1008756 Physica Status Solidi A43 81-8819770293
0016640GuyanaitePernet M, Berthet-Colominas C, Alario-Franco M, Christensen A (1977) Etude par diffraction neutronique de l'oxyhydroxyde de chrome beta-CrO OH _cod_database_code 1008763 Physica Status Solidi A43 81-8819770293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.224 Å(vvs)
2.432 Å(vs)
1.636 Å(s)
1.719 Å(ms)
1.609 Å(ms)
1.516 Å(ms)
2.524 Å(m)

Geological EnvironmentHide

Paragenetic Mode(s):

Type Occurrence of GuyanaiteHide

General Appearance of Type Material:
microcrystalline aggregates, alluvial grains; very rarely as prismatic crystals, up to 0.1 mm
Place of Conservation of Type Material:
The Natural History Museum, London, England, 1979,136.
Geological Setting of Type Material:
In an alluvial placer deposit, in fine-grained intergrowth with other chromium oxide-hydroxide minerals
Associated Minerals at Type Locality:

Synonyms of GuyanaiteHide

Other Language Names for GuyanaiteHide

German:Guyanait
Spanish:Guyanaita

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Guyanaite associated with BracewelliteCrO(OH)
1 photo of Guyanaite associated with GrimaldiiteCrO(OH)

Related Minerals - Strunz-mindat GroupingHide

4.FD.05SpertiniiteCu(OH)2Orth. mm2 : Cmc21
4.FD.10BracewelliteCrO(OH)Orth. mmm (2/m 2/m 2/m)
4.FD.10DiasporeAlO(OH)Orth. mmm (2/m 2/m 2/m)
4.FD.10GroutiteMn3+O(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
4.FD.10Montroseite(V3+,Fe3+)O(OH)Orth. mmm (2/m 2/m 2/m)
4.FD.10TsumgalliteGaO(OH)Orth. mmm (2/m 2/m 2/m)
4.FD.15ManganiteMn3+O(OH)Mon. 2/m : P21/b
4.FD.20Yttrotungstite-(Y)YW2O6(OH)3Mon. 2/m : P21/m
4.FD.20Yttrotungstite-(Ce)(Ce,Nd,Y)W2O6(OH)3Mon. 2 : P21
4.FD.20Unnamed (Nd-analogue of Yttrotungstite-(Ce))(Nd,Ce,La)W2O6(OH)3
4.FD.25FrankhawthorneiteCu2Te6+O4(OH)2Mon. 2/m
4.FD.30KhinitePb2+Cu2+3[Te6+O6](OH)2Orth. mm2 : Fdd2
4.FD.30Khinite-3TPb2+Cu2+3Te6+O6(OH)2Trig. 3 : P32
4.FD.30HousleyitePb6CuTe6+4O18(OH)2Mon. 2/m : P21/m

Other InformationHide

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 GuyanaiteHide

Reference List:

Localities for GuyanaiteHide

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 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.
Antarctica
 
  • Eastern Antarctica
    • American Highland
      • Grove Mountains
Li, X., Liu, X., Ju, Y., & Huang, F. (2003). Properties of soils in Grove Mountains, East Antarctica. Science in China Series D: Earth Sciences, 46(7), 683-693.
Finland
 
  • North Karelia
    • Outokumpu
Vuorelainen, Yrjö; Häkli, T.A.; Kataja, M. 1968. A hydrated oxide of chromium as a pseudumorph after eskolaite, Outokumpu, Finland. Bulletin of the Geological Society of Finland n:o 40, p. 125-129, illus.
Guyana
 
  • Cuyuni-Mazaruni Region
    • Omai
Voicu, G., & Bardoux, M. (2002). Geochemical behavior under tropical weathering of the Barama–Mazaruni greenstone belt at Omai gold mine, Guiana Shield. Applied geochemistry, 17(3), 321-336.
  • Potaro-Siparuni Region
    • Kamakusa
Geol.Soc.Amer.,Progr.Ann. Meeting (1967) p. 151. Livingston, A., Jackson, B., Davidson, P.J. (1984) Grimaldiite, CrOOH, a second occurrence, from the Hiaca Mine, Colquechaca, Bolivia. Mineralogical Magazine, 48, 560-562.
Russia
 
  • Perm Krai
    • Gornozavodskii District
      • Sarany
Суставов, С. Г., Шагалов, Е. С., Нурмухаметов, Ф. З., & Главатских, С. П. (2012). ПЕРВАЯ НАХОДКА В РОССИИ ОКСИГИДРАТОВ ХРОМА-ГРИМАЛЬДИТА И ГВИАНАИТА В ЮЖНО-САРАНОВСКОМ ХРОМИТОВОМ МЕСТОРОЖДЕНИИ. Литосфера, (3), 154-159.
USA
 
  • Utah
    • San Juan County
Schulze, D. J., Flemming, R. L., Shepherd, P. H., & Helmstaedt, H. (2014). Mantle-derived guyanaite in a Cr-omphacitite xenolith from Moses Rock diatreme, Utah. American Mineralogist, 99(7), 1277-1283.
 
Mineral and/or Locality  
Mindat Discussions Facebook Logo Instagram Logo Discord Logo
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 1993-2024, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: March 19, 2024 06:47:30 Page updated: June 30, 2023 04:42:36
Go to top of page