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Apexite

This page kindly sponsored by Tony Nikischer
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About ApexiteHide

Formula:
NaMg(PO4)·9H2O
Colour:
Colorless
Lustre:
Vitreous
Hardness:
2
Specific Gravity:
1.74
Crystal System:
Triclinic
Name:
Named after the type locality, the Apex mine, Nevada.
New structure type. Structurally related to hazenite (member of the struvite group).


Classification of ApexiteHide

Approved
Approval Year:
2015
First Published:
2015
8.CA.

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
A : With small and large/medium cations

Pronounciation of ApexiteHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of ApexiteHide

Vitreous
Transparency:
Transparent
Comment:
Crystals have vitreous to satiny luster.
Colour:
Colorless
Streak:
White
Hardness:
Comment:
about 2
Tenacity:
Brittle
Cleavage:
Perfect
One perfect cleavage on {100}.
Comment:
Fracture is curved
Density:
1.74(1) g/cm3 (Measured)    1.741 g/cm3 (Calculated)

Chemical Properties of ApexiteHide

Formula:
NaMg(PO4)·9H2O
IMA Formula:
NaMg(PO4) · 9H2O

Crystallography of ApexiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Setting:
P1
Cell Parameters:
a = 6.9296(7) Å, b = 11.977(1) Å, c = 14.944(2) Å
α = 92.109(6)°, β = 102.884(7)°, γ = 105.171(7)°
Ratio:
a:b:c = 0.579 : 1 : 1.248
Unit Cell V:
1160.9 ų
Z:
4
Morphology:
Needles up to 0.5 mm in length

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
14.63(35)
5.11(61)
4.68(75)
4.301(96)
4.008(44)
2.876(46)
2.762(100)
2.507(30)

Type Occurrence of ApexiteHide

General Appearance of Type Material:
A low-temperature secondary mineral on massive quartz matrix.
Place of Conservation of Type Material:
Co-type material is deposited in the collections of the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue numbers 65563 and 65564, and the Museum Victoria, Melbourne, Victoria, Australia, catalog
Associated Minerals at Type Locality:
Reference:
Kampf, A.R., Mills, S.J., Nash, B.P., Jensen, M., Nikischer, T. (2015) Apexite, NaMg(PO4)·9H2O, a new struvite-type phase with a heteropolyhedral cluster. American Mineralogist: 100: 2695–2701.

Synonyms of ApexiteHide

Related Minerals - Nickel-Strunz GroupingHide

8.CA.DavidlloyditeZn3(AsO4)2·4H2O Tric. 1 : P1
8.CA.05FransoletiteCa3Be2(PO4)2(HPO4)2 · 4H2OMon.
8.CA.05ParafransoletiteCa3Be2(PO4)2(HPO4)2 · 4H2OTric. 1 : P1
8.CA.10EhrleiteCa4Be3Zn2(PO4)6 · 9H2OTric. 1 : P1
8.CA.15FaheyiteBe2Mn2+Fe3+2(PO4)4 · 6H2OTrig. 3 2 : P31 2 1
8.CA.20GainesiteNa(Na,K)(Be,Li)Zr2(PO4)4 · 1.5-2H2OTet. 4mm : I41md
8.CA.20MccrillisiteNaCs(Be,Li)Zr2(PO4)4 · 1-2H2OTet. 4/mmm (4/m 2/m 2/m) : I41/amd
8.CA.20SelwyniteNaK(Be,Al)Zr2(PO4)4 · 2H2OTet.
8.CA.25PahasapaiteLi8(Ca,Li,K)10.5Be24(PO4)24 · 38H2OIso. 2 3 : I2 3
8.CA.30HopeiteZn3(PO4)2 · 4H2OOrth. mmm (2/m 2/m 2/m) : Pnma
8.CA.30ArsenohopeiteZn3(AsO4)2 · 4H2OOrth. mmm (2/m 2/m 2/m) : Pnma
8.CA.35WarikahniteZn3(AsO4)2 · 2H2OTric.
8.CA.40PhosphophylliteZn2Fe(PO4)2 · 4H2OMon. 2/m : P21/b
8.CA.45ParascholziteCaZn2(PO4)2 · 2H2OMon.
8.CA.45ScholziteCaZn2(PO4)2 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbcm
8.CA.50KeyiteCu2+3Zn4Cd2(AsO4)6 · 2H2OMon. 2/m
8.CA.55PushcharovskiteK0.6Cu18(AsO4)(HAsO4)10(H2AsO4)4(OH)9.6·18.6H2OTric.
8.CA.60ProsperiteCa2Zn4(AsO4)4 · H2OMon.
8.CA.65GengenbachiteKFe3+3(HPO4)4(H2PO4)2 · 6H2OTrig. 3m : P3 1c
8.CA.70ParahopeiteZn3(PO4)2 · 4H2OTric. 1 : P1

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 ApexiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Kampf, A.R., Mills, S.J., Nash, B.P., Jensen, M., Nikischer, T. (2015) Apexite, IMA 2015-002. CNMNC Newsletter No. 25, June 2015, page 531; Mineralogical Magazine: 79: 529-535.
Kampf, A.R., Mills, S.J., Nash, B.P., Jensen, M., Nikischer, T. (2015) Apexite, NaMg(PO4)·9H2O, a new struvite-type phase with a heteropolyhedral cluster. American Mineralogist: 100: 2695–2701.

Internet Links for ApexiteHide

Localities for ApexiteHide

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.
USA (TL)
 
  • Nevada
    • Lander Co.
      • Reese River District
Kampf, A.R., Mills, S.J., Nash, B.P., Jensen, M. and Nikischer, T. (2015) Apexite, IMA 2015-002. CNMNC Newsletter No. 25, June 2015, page 531; Mineralogical Magazine, 79, 529-535.;Kampf, A.R., Mills, S.J., Nash, B.P., Jensen, M., Nikischer, T. (2015): Apexite, NaMg(PO4)·9H2O, a new struvite-type phase with a heteropolyhedral cluster. American Mineralogist, 100, 2695–2701
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