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Mcnearite

A valid IMA mineral species
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00363170014952018899462.jpg
Mcnearite, etc.

Hilarion Mine, Kamariza Mines, Agios Konstantinos, Lavrion Mining District, Lavreotiki, East Attica, Attica, Greece
01207430014996126059337.jpg
Mcnearite

Gabe Gottes Mine, Sankt Jakob vein, Neuenberg, Sainte-Marie-aux-Mines, Colmar-Ribeauvillé, Haut-Rhin, Grand Est, France
02196300016321745821765.jpg
Mcnearite

Gabe Gottes Mine, Sankt Jakob vein, Neuenberg, Sainte-Marie-aux-Mines, Colmar-Ribeauvillé, Haut-Rhin, Grand Est, France
00363170014952018899462.jpg
Mcnearite, etc.

Hilarion Mine, Kamariza Mines, Agios Konstantinos, Lavrion Mining District, Lavreotiki, East Attica, Attica, Greece
00696630014995678797250.jpg
Mcnearite

Gabe Gottes Mine, Sankt Jakob vein, Neuenberg, Sainte-Marie-aux-Mines, Colmar-Ribeauvillé, Haut-Rhin, Grand Est, France
00907700016320458221167.jpg
Mcnearite

Gabe Gottes Mine, Sankt Jakob vein, Neuenberg, Sainte-Marie-aux-Mines, Colmar-Ribeauvillé, Haut-Rhin, Grand Est, France
00363170014952018899462.jpg
Mcnearite, etc.

Hilarion Mine, Kamariza Mines, Agios Konstantinos, Lavrion Mining District, Lavreotiki, East Attica, Attica, Greece
01207430014996126059337.jpg
Mcnearite

Gabe Gottes Mine, Sankt Jakob vein, Neuenberg, Sainte-Marie-aux-Mines, Colmar-Ribeauvillé, Haut-Rhin, Grand Est, France
Hide all sections | Show all sections

About McneariteHide

Formula:
NaCa5(AsO4)(HAsO4)4 · 4H2O
Colour:
White
Lustre:
Pearly
Specific Gravity:
2.65
Crystal System:
Triclinic
Name:
The name honours Elizabeth McNear who worked in the field of mineralogy and crystallography at the University of Geneva, Switzerland.
This page provides mineralogical data about Mcnearite.


Unique IdentifiersHide

Mindat ID:
2620
Long-form identifier:
mindat:1:1:2620:4
GUID
(UUID V4):
512b20c1-3e9f-4219-a773-890641d43a6a

IMA Classification of McneariteHide

Classification of McneariteHide

Strunz-mindat (2024):
8.CJ.55

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
J : With only large cations
Dana 8th ed.:
39.3.7.1

39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
3 : Miscellaneous
Hey's CIM Ref.:
20.2.15

20 : Arsenates (also arsenates with phosphate, but without other anions)
2 : Arsenates of Be, Mg, Ca or Ba

Mineral SymbolsHide

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

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

Physical Properties of McneariteHide

Lustre:
Pearly
Transparency:
Transparent, Translucent
Colour:
White
Streak:
White
Hardness Data:
Could not be measured
Tenacity:
Very brittle
Cleavage:
Perfect
Parallel to elongation
Density:
2.65 g/cm3 (Measured)    2.85 g/cm3 (Calculated)
Comment:
Measured is low due to porosity of fibrous aggregates

Optical Data of McneariteHide

Type:
Biaxial (+)
RI values:
nα = 1.559 nβ = 1.562 nγ = 1.572
2V:
Measured: 60° , Calculated: 58°
Max Birefringence:
δ = 0.013
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
r < v moderate

Chemistry of McneariteHide

Mindat Formula:
NaCa5(AsO4)(HAsO4)4 · 4H2O
Elements listed:
As, Ca, H, Na, O - search for minerals with similar chemistry

Crystallography of McneariteHide

Crystal System:
Triclinic
Cell Parameters:
a = 13.50 Å, b = 14.10 Å, c = 6.95 Å
α = 90°, β = 92°, γ = 119°
Ratio:
a:b:c = 0.957 : 1 : 0.493
Unit Cell V:
1,156.14 ų (Calculated from Unit Cell)
Z:
2
Comment:
Point Group: 1 or 1; Space Group: P1 or P1.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
12.33 Å(100)
3.92 Å(60)
3.122 Å(60)
6.94 Å(50)
2.748 Å(40)
4.40 Å(30)
3.400 Å(25)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 7: Great Oxidation Event<2.4
47a : [Near-surface hydration of prior minerals]
47d : [Arsenates, antimonates, selenates, bismuthinates]

Type Occurrence of McneariteHide

Type Locality:
ⓘ Gabe Gottes Mine, Sankt Jakob vein, Neuenberg, Sainte-Marie-aux-Mines, Colmar-Ribeauvillé, Haut-Rhin, Grand Est, France
General Appearance of Type Material:
Radiating fibers, up to 1-2 mm in length
Place of Conservation of Type Material:
Natural History Museum, Geneva, Switzerland, 435/40.
Geological Setting of Type Material:
Oxidized zone of arsenic-bearing rocks.
Associated Minerals at Type Locality:
PicropharmacolitePharmacoliteHaidingeriteGuérinite
Reference:
Sarp, H., Deferne, J., Liebich, B. W. (1981) La mcnearite, NaCa5H4(AsO4)5•4H2O, un nouvel arséniate hydraté de calcium et de sodium. Schweizerische Mineralogische und Petrographische Mitteilungen: 61: 1-6.

Synonyms of McneariteHide

Other Language Names for McneariteHide

German:Mcnearit
Spanish:Mcnearita

Common AssociatesHide

Associated Minerals Based on Photo Data:
2 photos of Mcnearite associated with SlavkoviteCu13(AsO4)6(AsO3OH)4 · 23H2O

Related Minerals - Strunz-mindat GroupingHide

8.CJ.SainfelditeCa5(AsO4)2(AsO3OH)2 · 4H2OMon. 2/m : B2/b
8.CJ.CaesiumpharmacosideriteCsFe4[(AsO4)3(OH)4] · 4H2OIso. 4 3m : P4 3m
8.CJ.JeankempiteCa5(AsO4)2(HAsO4)2 · 7H2OTric. 1 : P1
8.CJ.AirditeSr(V4+O)2(PO4)2 · 4H2OMon. m : Bb
8.CJ.DobšináiteCa2Ca(AsO4)2 · 2H2OMon. 2/m : P21/b
8.CJ.05Stercorite(NH4)Na(PO3OH) · 4H2OTric. 1 : P1
8.CJ.10Mundrabillaite(NH4)2Ca(PO3OH)2 · H2OMon. m : Pm
8.CJ.10Swaknoite(NH4)2Ca(PO3OH)2 · H2OOrth.
8.CJ.15NabaphiteNaBaPO4 · 9H2OIso. 2 3 : P21 3
8.CJ.15NastrophiteNa(Sr,Ba)PO4 · 9H2OIso. 2 3 : P21 3
8.CJ.20HaidingeriteCaHAsO4 · H2OOrth. mmm (2/m 2/m 2/m) : Pbcn
8.CJ.25VladimiriteCa4(AsO4)2(AsO3OH) · 4H2OMon. 2/m : P21/b
8.CJ.25Rhabdophane-(Y)YPO4 · H2OHex. 6 2 2 : P62 2 2
8.CJ.27Churchite-(Dy)(Dy,Sm,Gd,Nd)PO4 · 2H2OMon.
8.CJ.30FerrarisiteCa5(AsO4)2(HAsO4)2 · 9H2OTric. 1 : P1
8.CJ.35Machatschkiite(Ca,Na)6(AsO4)(HAsO4)3(PO4,SO4) · 15H2OTrig. 3m : R3c
8.CJ.35FulbrightiteCa(VO)2(AsO4)2 · 4H2OTric. 1 : P1
8.CJ.40PhaunouxiteCa3(AsO4)2 · 11H2OTric.
8.CJ.40RauenthaliteCa3(AsO4)2 · 10H2OTric. 1 : P1
8.CJ.45Brockite(Ca,Th,Ce)PO4 · H2OHex. 6 2 2 : P62 2 2
8.CJ.45Grayite(Th,Pb,Ca)(PO4) · H2OHex. 6 2 2 : P62 2 2
8.CJ.45Rhabdophane-(Ce)Ce(PO4) · 0.6H2OTrig. 3 2 : P31 2 1
8.CJ.45Rhabdophane-(La)La(PO4) · H2OHex. 6 2 2 : P62 2 2
8.CJ.45Rhabdophane-(Nd)Nd(PO4) · H2OHex. 6 2 2 : P62 2 2
8.CJ.45Tristramite(Ca,U,Fe)(PO4,SO4) · 2H2OHex. 6 2 2 : P62 2 2
8.CJ.45Smirnovskite(Th,Ca)PO4 · nH2OHex. 6 2 2 : P62 2 2
8.CJ.45ŠtěpiteU(AsO3OH)2 · 4H2O Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
8.CJ.47VysokýiteU4+[AsO2(OH)2]4 · 4H2OTric. 1 : P1
8.CJ.50ArdealiteCa2(PO3OH)(SO4) · 4H2OMon. m : Bb
8.CJ.50BrushiteCa(PO3OH) · 2H2OMon. m : Bb
8.CJ.50Churchite-(Y)Y(PO4) · 2H2OMon. 2/m : B2/b
8.CJ.50PharmacoliteCa(HAsO4) · 2H2OMon. m
8.CJ.50Churchite-(Nd)Nd(PO4) · 2H2OMon.
8.CJ.60DorfmaniteNa2(PO3OH) · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.CJ.65SincositeCa(VO)2(PO4)2 · 5H2OTet. 4/mmm (4/m 2/m 2/m) : P42/nnm
8.CJ.65BariosincositeBa(VO)2(PO4)2 · 4H2OTet.
8.CJ.70CatalanoiteNa2(PO3OH) · 8H2OOrth. mmm (2/m 2/m 2/m) : Ibca
8.CJ.75GuériniteCa6(HAsO4)3(AsO4)2 · 10.5H2OMon. 2/m : P21/b
8.CJ.85Ningyoite(U,Ca,Ce)2(PO4)2 · 1-2H2OOrth.

Fluorescence of McneariteHide

In UV light:
Violet under LW UV

Other InformationHide

Notes:
Dissolved by acids
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 McneariteHide

References for McneariteHide

Localities for McneariteHide

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.
Czech Republic
 
  • Central Bohemian Region
    • Příbram District
      • Dubno
Ondruš et al. (1989)
  • Karlovy Vary Region
    • Karlovy Vary District
Lapis 2002 (7/8)
France
 
  • Grand Est
    • Haut-Rhin
      • Colmar-Ribeauvillé
        • Sainte-Marie-aux-Mines
P&T N°23-24 et al. (Haut-Rhin)
            • Sankt Jakob vein
Sarp et al. (1981)
This mine worked the same vein as Gabe ... +2 other references
Greece
 
  • Attica
    • East Attica
      • Lavreotiki
        • Lavrion Mining District
          • Agios Konstantinos (Kamariza)
            • Kamariza Mines (Kamareza Mines)
Rieck et al. (2018)
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