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

Bearthite

A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
04976180014946700855231.jpg
Bearthite, etc.

Rotriegel ridge, Freßnitzgraben, Krieglach, Bruck-MĂŒrzzuschlag District, Styria, Austria
04040230014946592242258.jpg
Bearthite, etc.

Ganz valley, Langenwang, Bruck-MĂŒrzzuschlag District, Styria, Austria
02764870014949964608851.jpg
Bearthite, etc.

Ganz valley, Langenwang, Bruck-MĂŒrzzuschlag District, Styria, Austria
04976180014946700855231.jpg
Bearthite, etc.

Rotriegel ridge, Freßnitzgraben, Krieglach, Bruck-MĂŒrzzuschlag District, Styria, Austria
04040230014946592242258.jpg
Bearthite, etc.

Ganz valley, Langenwang, Bruck-MĂŒrzzuschlag District, Styria, Austria
08691920014992757319652.jpg
Bearthite, etc.

Ganz valley, Langenwang, Bruck-MĂŒrzzuschlag District, Styria, Austria
04976180014946700855231.jpg
Bearthite, etc.

Rotriegel ridge, Freßnitzgraben, Krieglach, Bruck-MĂŒrzzuschlag District, Styria, Austria
04040230014946592242258.jpg
Bearthite, etc.

Ganz valley, Langenwang, Bruck-MĂŒrzzuschlag District, Styria, Austria
Hide all sections | Show all sections

About BearthiteHide

08519150015354882234856.jpg
Peter Bearth
Formula:
Ca2Al(PO4)2(OH)
Colour:
Pale yellow
Hardness:
4 - 5
Specific Gravity:
3.25 (Calculated)
Crystal System:
Monoclinic
Name:
Named in honor of Peter Bearth (30 August 1902, Sumvitg, Switzerland - 24 August 1989, Basel, Switzerland) in recognition of his pioneering petrographic work on the high-pressure terranes of the western Alps. He mapped 1100 km2 of alpine and high alpine terrain in Oberwald. He was simultaneously a high school teacher and a professor of Petrography at the University of Basel.
This page provides mineralogical data about Bearthite.


Unique IdentifiersHide

Mindat ID:
590
Long-form identifier:
mindat:1:1:590:4
GUID
(UUID V4):
3ed7db30-f05f-4ab8-ad43-a0cac2d728b1

IMA Classification of BearthiteHide

Classification of BearthiteHide

Strunz-mindat (2024):
8.BG.05

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
G : With medium-sized and large cations, (OH, etc.):RO4 = 0.5:1
Dana 8th ed.:
41.10.4.2

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
10 : (AB)3(XO4)2Zq

Mineral SymbolsHide

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

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

Physical Properties of BearthiteHide

Transparency:
Transparent
Colour:
Pale yellow
Streak:
White
Hardness:
4 - 5 on Mohs scale
Cleavage:
Poor/Indistinct
One poor prismatic cleavage.
Fracture:
Irregular/Uneven
Density:
3.25 g/cm3 (Calculated)

Optical Data of BearthiteHide

Type:
Biaxial (+)
RI values:
nα = 1.662(1) nβ = 1.671(1) nγ = 1.696(1)
2V:
Measured: 65° , Calculated: 64°
Max Birefringence:
δ = 0.034
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
Weak to distint, r
Optical Extinction:
X = b.

Chemistry of BearthiteHide

Mindat Formula:
Ca2Al(PO4)2(OH)
Elements listed:
Al, Ca, H, O, P - search for minerals with similar chemistry
Common Impurities:
Sr,Mg,Fe,Ce,La,Si,F,Cl,Nd

Crystallography of BearthiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Cell Parameters:
a = 7.23 Å, b = 5.73 Å, c = 8.26 Å
β = 112.57°
Ratio:
a:b:c = 1.262 : 1 : 1.442
Unit Cell V:
315.99 ų (Calculated from Unit Cell)
Z:
2

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)
0015407BearthiteChopin C, Brunet F, Gebert W, Medenbach O, Tillmanns E (1993) Bearthite, Ca2Al[PO4]2(OH), a new mineral from high-pressure terranes of the western Alps Schweizerische Mineralogische und Petrographische Mitteilungen 73 1-91993Dora Maira massif, western Alps, Italy0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.05 Å(100)
2.867 Å(61)
2.568 Å(39)
2.754 Å(27)
4.58 Å(22)
2.634 Å(21)
2.444 Å(19)
Comments:
calculated due to poor Gandolphi pattern

Geological EnvironmentHide

Type Occurrence of BearthiteHide

Co-Type Localities:
ⓘ Gilba Valley, Brossasco, Cuneo Province, Piedmont, Italy
ⓘ Po Valley, Cuneo Province, Piedmont, Italy
ⓘ Metapelite outcrops, Stockhorn, Gorner glacier area, Zermatt, Visp, Valais, Switzerland
General Appearance of Type Material:
Yellowish aggregates, up to millimeter size, of partly euhedral, flat prismatic crystals and as smaller anhedral grains corroded by lazulite .
Place of Conservation of Type Material:
Mineralogic-Petrographic Institute, University of Basel, Basel, Switzerland; PB100f.
National School of Mines, Paris, France; 84DM54, 85DM45, 85DM70.
National History Museum, Paris, France.
Geological Setting of Type Material:
In gneiss and schist, in pyrope-phengite quartzite and in coesite-bearing metapelite. Formed through high-pressure metamorphism.
Reference:
Chopin, C., Brunet, F., Gebert, W., Medenbach, O., Tillmanns, E. (1993) Bearthite, Ca2Al[PO4]2(OH), a new mineral from high-pressure terranes of the western Alps. Schweizerische Mineralogische und Petrographische Mitteilungen: 73: 1-9.

Synonyms of BearthiteHide

Other Language Names for BearthiteHide

Relationship of Bearthite to other SpeciesHide

Member of:
Brackebuschite Supergroup
Other Members of this group:
AldomarinoiteSr2Mn3+(AsO4)2(OH)Mon. 2/m : P21/m
ArsenbrackebuschitePb2Fe3+(AsO4)2(OH)Mon. 2/m : P2/m
ArsentsumebitePb2Cu(AsO4)(SO4)(OH)Mon. 2/m : P21/m
BrackebuschitePb2Mn3+(VO4)2(OH)Mon. 2/m : P21/m
BushmakinitePb2Al(PO4)(VO4)(OH)Mon. 2/m : P21/m
CalderĂłnitePb2Fe3+(VO4)2(OH)Mon. 2/m : P21/m
CanosioiteBa2Fe3+(AsO4)2(OH)Mon. 2/m : P21/m
FeinglositePb2Zn(AsO4)2 · H2OMon. 2/m
FerribushmakinitePb2Fe3+(PO4)(VO4)(OH)Mon. 2/m : P21/m
GamagariteBa2Fe3+(VO4)2(OH)Mon. 2/m : P21/m
GoedkeniteSr2Al(PO4)2(OH)Mon. 2/m : P21/m
GrandaiteSr2Al(AsO4)2(OH)Mon. 2/m : P21/m
LombardoiteBa2Mn3+(AsO4)2(OH)Mon. 2/m : P21/m
TokyoiteBa2Mn3+(VO4)2(OH)Mon. 2/m : P21/m
TsumebitePb2Cu(PO4)(SO4)(OH)Mon. 2/m : P21/m
Unnamed (possible ordered As-analogue of Tokyoite)Ba2Mn[(As,V)O4]2(OH)Mon. 2/m : P21/m

Common AssociatesHide

Associated Minerals Based on Photo Data:
4 photos of Bearthite associated with LazuliteMgAl2(PO4)2(OH)2
2 photos of Bearthite associated with QuartzSiO2

Related Minerals - Strunz-mindat GroupingHide

8.BG.CanosioiteBa2Fe3+(AsO4)2(OH)Mon. 2/m : P21/m
8.BG.AldomarinoiteSr2Mn3+(AsO4)2(OH)Mon. 2/m : P21/m
8.BG.DongchuanitePb4ZnZn2(PO4)4(OH)2Tric. 1 : P1
8.BG.CuprodongchuanitePb4CuZn2(PO4)4(OH)2Tric. 1 : P1
8.BG.05ArsentsumebitePb2Cu(AsO4)(SO4)(OH)Mon. 2/m : P21/m
8.BG.05BrackebuschitePb2Mn3+(VO4)2(OH)Mon. 2/m : P21/m
8.BG.05GamagariteBa2Fe3+(VO4)2(OH)Mon. 2/m : P21/m
8.BG.05GoedkeniteSr2Al(PO4)2(OH)Mon. 2/m : P21/m
8.BG.05UM1994-19-PO:CuHMoPbPb2Cu(PO4)(MoO4,AsO4,CrO4,GaO4)(OH)
8.BG.05TsumebitePb2Cu(PO4)(SO4)(OH)Mon. 2/m : P21/m
8.BG.05ArsenbrackebuschitePb2Fe3+(AsO4)2(OH)Mon. 2/m : P2/m
8.BG.05FeinglositePb2Zn(AsO4)2 · H2OMon. 2/m
8.BG.05BushmakinitePb2Al(PO4)(VO4)(OH)Mon. 2/m : P21/m
8.BG.05TokyoiteBa2Mn3+(VO4)2(OH)Mon. 2/m : P21/m
8.BG.05CalderĂłnitePb2Fe3+(VO4)2(OH)Mon. 2/m : P21/m
8.BG.05FerribushmakinitePb2Fe3+(PO4)(VO4)(OH)Mon. 2/m : P21/m
8.BG.05LombardoiteBa2Mn3+(AsO4)2(OH)Mon. 2/m : P21/m
8.BG.05Unnamed (possible ordered As-analogue of Tokyoite)Ba2Mn[(As,V)O4]2(OH)Mon. 2/m : P21/m
8.BG.10MĂ©lonjosephiteCaFe2+Fe3+(PO4)2(OH)Orth. mmm (2/m 2/m 2/m) : Pbam
8.BG.15TancoiteLiNa2Al(PO4)(PO3OH)(OH)Orth. mmm (2/m 2/m 2/m) : Pbca
8.BG.20DmisokoloviteK3Cu5AlO2(AsO4)4Mon. 2/m : B2/b
8.BG.25ShchurovskyiteK2CaCu6O2(AsO4)4Mon. 2 : B2
8.BG.30WrightiteK2Al2O(AsO4)2Orth. mmm (2/m 2/m 2/m) : Pmma
8.BG.35PolyarsiteNa7CaMgCu2(AsO4)4F2ClMon. 2/m

Fluorescence of BearthiteHide

In UV light:
cathode luminescence - green

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.

Internet Links for BearthiteHide

References for BearthiteHide

Localities for BearthiteHide

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.
Austria
 
  • Styria
    • Bruck-MĂŒrzzuschlag District
      • Krieglach
        • Freßnitzgraben
          • Alpl
SEM-EDS and XRD on sample AN1267 (HK022)
Bernhard (1998)
      • Langenwang
Bernhard (2006)
Italy (TL)
 
  • Piedmont
    • Cuneo Province
      • Brossasco
Chopin C et al. (1993) +1 other reference
Mandarino (1996)
      • Martiniana Po
Piccoli et al. (2007)
Chopin C et al. (1993)
  • Trentino-Alto Adige (Trentino-South Tyrol)
    • South Tyrol
      • Wipptal (Alta Vall'Isarco)
        • Pfitsch (Val di Vizze)
          • Sankt Jakob (San Giacomo)
Morteani et al. (1996)
Folie et al. (2010)
Sweden
 
  • SkĂ„ne County
    • Bromölla
      • NĂ€sum
Sandström (2007)
Switzerland (TL)
 
  • Valais
    • Visp
      • Zermatt
        • Gorner glacier area
          • Stockhorn
SMPM 73 (1993) +3 other references
Quick NavTopAbout BearthiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesRelationshipsCommon AssociatesStrunz-MindatFluorescence Other InformationInternet Links References Localities Locality List
 
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: April 26, 2024 16:57:55 Page updated: January 18, 2024 20:58:41
Go to top of page