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Monetite

A valid IMA mineral species - grandfathered
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About MonetiteHide

Formula:
Ca(PO3OH)
Colour:
White, yellow or colorless; colorless in transmitted light.
Lustre:
Sub-Vitreous, Resinous, Waxy
Hardness:
Specific Gravity:
2.929
Crystal System:
Triclinic
Name:
Named by Charles Upham Shepard in 1882 for the type locality of Moneto Island, near Puerto Rico, Caribbean, one of the two islands where it was initially found. The locality name is sometimes given as Moneta Island or currently Monito Island.
This page provides mineralogical data about Monetite.


Unique IdentifiersHide

Mindat ID:
2755
Long-form identifier:
mindat:1:1:2755:3
GUID
(UUID V4):
6340b292-f0a4-492f-8ec5-54207e194028

IMA Classification of MonetiteHide

Approved, 'Grandfathered' (first described prior to 1959)

Classification of MonetiteHide

8.AD.10

8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
D : With only large cations
Dana 7th ed.:
37.1.1.1
37.1.1.1

37 : ANHYDROUS ACID PHOSPHATES, ARSENATES AND VANADATES
1 : Miscellaneous
19.4.1

19 : Phosphates
4 : Phosphates of Ca

Mineral SymbolsHide

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

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

Physical Properties of MonetiteHide

Sub-Vitreous, Resinous, Waxy
Transparency:
Translucent
Comment:
Formerly given inaccurately as vitreous
Colour:
White, yellow or colorless; colorless in transmitted light.
Streak:
Colorless to white
Hardness:
3½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Imperfect/Fair
On three unspecified planes.
Fracture:
Irregular/Uneven
Density:
2.929 g/cm3 (Measured)    2.924 g/cm3 (Calculated)
Comment:
Measured value on artificial material.

Optical Data of MonetiteHide

Type:
Biaxial (+/-)
RI values:
nα = 1.587 - 1.600 nβ = 1.615 nγ = 1.631 - 1.640
2V:
Measured: 70° , Calculated: 74°
Birefringence:
0.043
Max Birefringence:
δ = 0.044
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r > v strong
Optical Extinction:
Inclined

Chemistry of MonetiteHide

Mindat Formula:
Ca(PO3OH)

Crystallography of MonetiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Cell Parameters:
a = 6.91 Å, b = 6.627 Å, c = 6.998 Å
α = 96.34°, β = 103.82°, γ = 88.33°
Ratio:
a:b:c = 1.043 : 1 : 1.056
Unit Cell V:
309.28 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Minute crystals forming massive aggregates; crusts, stalactites with rough crystalline surfaces. Crystals have rough surfaces and are frequently configured in interpenetrating groups; commonly flattened {010} with a rhombohedral outline.
Comment:
AC(B) 33:1223 (1977), also JCPDS 9-80 (synthetic)

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0009584MonetiteCatti M, Ferraris G, Filhol A (1977) Hydrogen bonding in the crystalline state. CaHPO4 (monetite), P-1 or P1? A novel neutron diffraction study Acta Crystallographica B33 1223-12291977Synthetic0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

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Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.
Powder Diffraction Data:
d-spacingIntensity
3.37 Å(70)
3.35 Å(80)
3.13 Å(20)
2.96 Å(100)
2.94 Å(40)
2.75 Å(20)
2.72 Å(40)
1.850 Å(20)
Comments:
JCPDS 9-80 (synthetic)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 7: Great Oxidation Event<2.4
47a : [Near-surface hydration of prior minerals]
47c : [Carbonates, phosphates, borates, nitrates]
Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere<0.6
49 : Oxic cellular biomineralization (see also #44)<0.54
52 : Guano- and urine-derived minerals<0.4

Type Occurrence of MonetiteHide

Geological Setting of Type Material:
Formed by the interaction of bird guano in a limestone cave.

Synonyms of MonetiteHide

Other Language Names for MonetiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Monetite associated with NewberyiteMg(PO3OH) · 3H2O

Related Minerals - Strunz-mindat GroupingHide

8.AD.KepleriteCa9(Ca0.5◻0.5)Mg(PO4)7Trig. 3m : R3c
8.AD.DeynekoiteCa9◻Fe3+(PO4)7Trig. 3m : R3c
8.AD.MazoriteBa3(PO4)2Trig. 3m (3 2/m) : R3m
8.AD.Monazite-(Gd)Gd(PO4)Mon.
8.AD.05NahpoiteNa2(PO3OH)Mon. 2/m : P21/m
8.AD.10WeiliteCa(HAsO4)Tric. 1 : P1
8.AD.10Ć venekiteCa(H2AsO4)2Tric. 1 : P1
8.AD.15Archerite(K,NH4)(H2PO4)Tet. 4 2m : I4 2d
8.AD.15BiphosphammiteNH4(H2PO4)Tet. 4 2 2 : I41 2 2
8.AD.20Phosphammite(NH4)2(PO3OH)Mon. 2/m : P21/b
8.AD.25BuchwalditeNaCa(PO4)Orth. mm2 : Pmn21
8.AD.30SchultenitePb(HAsO4)Mon. 2/m : P2/b
8.AD.35Chernovite-(Y)Y(AsO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
8.AD.35DreyeriteBi(VO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
8.AD.35Wakefieldite-(Ce)Ce(VO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
8.AD.35Wakefieldite-(Y)Y(VO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
8.AD.35Xenotime-(Y)Y(PO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
8.AD.35Chernovite-(Ce)(Ce,Y)(AsO4)Tet.
8.AD.35PretuliteSc(PO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
8.AD.35Xenotime-(Yb)Yb(PO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
8.AD.35Wakefieldite-(La)La(VO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
8.AD.35Wakefieldite-(Nd)Nd(VO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
8.AD.35Xenotime-(Gd)Gd(PO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
8.AD.40PucheriteBi(VO4)Orth. mmm (2/m 2/m 2/m)
8.AD.45XimengiteBi(PO4)Trig. 3 2 : P31 2 1
8.AD.50Gasparite-(Ce)Ce(AsO4)Mon. 2/m
8.AD.50Monazite-(Ce)Ce(PO4)Mon. 2/m
8.AD.50Monazite-(La)La(PO4)Mon. 2/m
8.AD.50Monazite-(Nd)Nd(PO4)Mon. 2/m
8.AD.50RooseveltiteBi(AsO4)Mon. 2/m
8.AD.50CheraliteCaTh(PO4)2Mon. 2/m
8.AD.50Monazite-(Sm)Sm(PO4)Mon. 2/m
8.AD.50UM2005-35-VO:CaFePSiTh(Th,Ca)(VO4,SiO4,PO4)
8.AD.50Gasparite-(La)La(AsO4)Mon. 2/m
8.AD.55TetrarooseveltiteBi(AsO4)Tet. 4/m : I41/a
8.AD.60Chursinite[Hg2]2+Hg2+2[AsO4]2Mon. 2/m : P21/b
8.AD.65ClinobisvaniteBi(VO4)Mon. 2/m
8.AD.70GurimiteBa3(VO4)2Trig. 3m : R3m
8.AD.75PicaiteNaCa[AsO3OH][AsO2(OH)2]Mon. 2/m : P21/b

Fluorescence of MonetiteHide

Not fluorescent

Other InformationHide

Notes:
Powdered material takes up water from the atmosphere and forms Brushite.
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 MonetiteHide

References for MonetiteHide

Reference List:

Localities for MonetiteHide

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.
Argentina
 
  • Mendoza Province
    • MalargĂŒe Department
      • MalargĂŒe District
Benedetto et al. (1998)
Australia
 
  • Western Australia
    • Dundas Shire
      • Cocklebiddy Roadhouse
Caves: processes +1 other reference
Bahamas
 
  • San Salvador District
    • San Salvador Island
Onac B.P. et al. (2009)
Brazil
 
  • ParĂĄ
    • Parauapebas
      • CarajĂĄs iron complex
        • N4WS Pit
PilĂł et al. (2023)
Chile
 
  • Antofagasta
    • Antofagasta Province
      • Mejillones
        • Mejillones peninsula
XRD by Gerhard Möhn and Joy Desor
China
 
  • Shaanxi
    • Hanzhong
      • Ningqiang County
Xiyue Wang et al. (1987)
Greece
 
  • Attica
    • East Attica
      • Lavreotiki
Skarpelis et al. (2009)
Hungary
 
  • Borsod-AbaĂșj-ZemplĂ©n County
    • Putnok District
      • Aggtelek
Kazakhstan
 
  • West Kazakhstan Region
    • Bayterek District
Sharygin (2022)
Kiribati
 
Gaines et al. (1997)
Gaines et al. (1997)
Malaysia
 
  • Sarawak
    • Miri Division
Bridge et al. (1983)
Namibia
 
  • Erongo Region
    • DĂąures Constituency
von Bezing (2007)
U. Kolitsch (single-crystal X-ray diffraction)
Netherlands
 
  • Aruba
    • San Nicolaas
Stienstra (1985)
Romania
 
  • Constanța County
Dumitras D et al. (2004)
  • Hunedoara County
    • Boșorod
Onac et al. (2002)
  • Mehedinti County
    • Dubova
Marincea et al. (2004) +1 other reference
  • Sălaj County
    • Ileanda
      • Răstoci
Onac et al. (2003)
Russia
 
  • Altai Krai
Sokol et al. (2022)
Saint Helena Ascension and Tristan da Cunha
 
American Mineralogist 28:215-232
South Korea
 
  • Gangwon Province
    • Yeongwol County
Jun +4 other references
Spain
 
  • Castile and Leon
    • Burgos
Muñoz-García
USA
 
  • California
    • Mono County
      • Mono Lake
Van Nostrand Reinholt Press: 314. +4 other references
  • Hawaii
    • Hawaii County
Bortolozzi (n.d.)
  • Puerto Rico
    • MayagĂŒez
American Mineralogist 28:215-232 +3 other references
Palache et al. (1951)
Venezuela
 
  • Federal Dependencies
American Mineralogist 28:215-232 +1 other reference
 
Mineral and/or Locality  
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