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Monetite

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Formula:
Ca(HPO4)
System:
Triclinic
Colour:
White, yellow or ...
Hardness:
Name:
Named by Charles Upham Shepard in 1882 for the type locality: Moneto Island, near Puerto Rico, Caribbean, one of the two islands where it was initially found. [Locality sometimes given as Moneta Island.]
This page provides mineralogical data about Monetite.

Classification of Monetite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
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
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http://www.mindat.org/min-2755.html
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Type Occurrence of Monetite

Year of Discovery:
1882
Geological Setting of Type Material:
Formed by the interaction of bird guano in a limestone cave.

Physical Properties of Monetite

Sub-Vitreous, Resinous, Waxy
Diaphaneity (Transparency):
Translucent
Comment:
Formerly given inaccurately as vitreous
Colour:
White, yellow or colorless; colorless in transmitted light.
Streak:
Colorless to white
Hardness (Mohs):
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.

Crystallography of Monetite

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Cell Parameters:
a = 6.91Å, b = 6.627Å, c = 6.998Å
α = 96.34°, β = 103.82°, γ = 88.33°
Ratio:
a:b:c = 1.043 : 1 : 1.056
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)
X-Ray Powder Diffraction:
Image Loading

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

Optical Data of Monetite

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

Chemical Properties of Monetite

Formula:
Ca(HPO4)
Essential elements:
All elements listed in formula:

Relationship of Monetite to other Species

8.AD.05NahpoiteNa2HPO4
8.AD.10WeiliteCa(HAsO4)
8.AD.10ŠvenekiteCa(H2AsO4)2
8.AD.15Archerite(K,NH4)(H2PO4)
8.AD.15Biphosphammite(NH4,K)(H2PO4)
8.AD.20Phosphammite(NH4)2(HPO4)
8.AD.25BuchwalditeNaCa(PO4)
8.AD.30SchultenitePb(HAsO4)
8.AD.35Chernovite-(Y)Y(AsO4)
8.AD.35DreyeriteBi(VO4)
8.AD.35Wakefieldite-(Ce)Ce(VO4)
8.AD.35Wakefieldite-(Y)Y(VO4)
8.AD.35Xenotime-(Y)Y(PO4)
8.AD.35PretuliteSc(PO4)
8.AD.35Xenotime-(Yb)(Yb,Y,HREE)(PO4)
8.AD.35Wakefieldite-(La)La(VO4)
8.AD.40PucheriteBi(VO4)
8.AD.45XimengiteBi(PO4)
8.AD.50Gasparite-(Ce)(Ce,REE)(AsO4)
8.AD.50Monazite-(Ce)(Ce,La,Nd,Th)(PO4)
8.AD.50Monazite-(La)(La,Ce,Nd)(PO4)
8.AD.50Monazite-(Nd)(Nd,La,Ce)(PO4)
8.AD.50RooseveltiteBi(AsO4)
8.AD.50Cheralite(Ca,Ce)(Th,Ce)(PO4)2
8.AD.50Monazite-(Sm)(Sm,Gd,Ce,Th)(PO4)
8.AD.50UM2005-35-VO:CaFePSiTh(Th,Ca)(VO4,SiO4,PO4)
8.AD.55TetrarooseveltiteBi(AsO4)
8.AD.60Chursinite(Hg2+)0.5Hg2+(AsO4)
8.AD.65ClinobisvaniteBi(VO4)
19.4.2HydroxylapatiteCa5(PO4)3(OH)
19.4.3BrushiteCa(HPO4) · 2H2O
19.4.4IsoclasiteCa2(PO4)(OH) · 2H2O
19.4.5BuchwalditeNaCa(PO4)
19.4.6CanaphiteNa2Ca(P2O7) · 4H2O
19.4.7Mundrabillaite(NH4)2Ca(HPO4)2 · H2O
19.4.8WhitlockiteCa9Mg(PO4)6(HPO4)
19.4.9BrianiteNa2CaMg(PO4)2
19.4.10Petersite-(Y)(Y,Ce,Nd)Cu6(PO4)3(OH)6 · 3H2O

Other Names for Monetite

Name in Other Languages:
German:Monetit
Spanish:Monetita

Other Information

Other Information:
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.

References for Monetite

Reference List:
Shepard (1856) American Journal of Science 22: 96 (as Glaubapatite, in part).

Shepard (1882) American Journal of Science: 23: 400.

de Schulten (1901) Bulletin de la Société française de Minéralogie: 24: 332.

de Schulten (1904) Bulletin de la Société française de Minéralogie: 27: 120.

Willbourn (1925) Journal of the Malayan Branch of the Royal Asiatic Society: 3, Pt. 3: 57.

Larsen, E.S. and Berman, H. (1934) The Microscopic Determination of the Nonopaque Minerals, Second edition, USGS Bulletin 848: 111.

Hill and Hendricks (1936) Ind. Eng. Chem.: 38: 440.

Frondel (1943) American Mineralogist: 28: 215.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 660-661.

American Mineralogist, 1958, v.43, 1148.

Materials Research Bulletin, 1970, v. 5, p. 437.

Acta Crystallographica (1977): B33: 1223-1229.

Internet Links for Monetite

Localities for Monetite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Australia
 
  • Western Australia
    • Dundas Shire
      • Cocklebiddy Roadhouse
Caves: processes, development, and management By David S. Gillieson
China
 
  • Shaanxi Province
    • Hanzhong Prefecture
      • Ningqiang Co.
Xiyue Wang, Huimin Zhang, Sichao Wang, and Yuezhen Wu (1987): Acta Petrologica et Mineralogica 6(4), 296-306
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
Skarpelis, N. and Argyraki, A. (2009): The geology and origin of supergene ores in Lavrion (Attica, Greece). Resource Geology, 59, 1-14.
Hungary
 
  • Borsod-Abaúj-Zemplén Co.
    • Aggteleki Mts
      • Aggtelek
Kiribati
 
Dana's New Mineralogy, 1997, Gaines, et al.
Dana's New Mineralogy, 1997, Gaines, et al.
Malaysia
 
  • Borneo Island
    • Sarawak
Mineralogical Magazine (1983): 47: 79-80.
Namibia
 
  • Erongo Region
    • Karibib District
      • Usakos
Von Bezing, L., Bode, R., and Jahn, S., (2008) Namibia Minerals and Localities. Edition Schloss Freudenstein, Bode Verlag GmbH, Haltern. 409 (in English).
U. Kolitsch (single-crystal X-ray diffraction)
Puerto Rico
 
  • Mayaguez
Shepard (1882) American Journal of Science, ser. 3: 23, 400-405; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 661.
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 661.
Romania
 
  • Hunedoara Co.
    • Hunedoara
      • Boșorod
Onac, B.P., Breban, R., Kearns, J., and Tamas, T. (2002) Unusual minerals related to phosphate deposits in Cioclovina Cave, Şureanu Mts. (Romania). Theoretical and Applied Karstology: 15: 27-34.
Saint Helena
 
American Mineralogist 28:215-232
USA
 
  • California
    • Mono Co.
      • Mono Lake
Cohen, L.H. & P.H. Ribbe (1966), Magnesium phosphate mineral replacdement at Mono Lake California: American Mineralogist: 51: 1755-1765; Ribbe, P.H. and Cohen, L. (1966) Newberyite and monetite from Paoha Island, Mono Lake, California. California Division of Mines and Geology Mineral Information Service: 19: 46; Cooper, J.F. & G.E. Dunning (1969), Struvite found at Mono Lake: California Division Mines & Geol. Min. Info Svc.: 22: 44-45; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 314.
  • Hawaii
    • Hawaii Co. (Hawaii Island)
Giorgio Bortolozzi collection
Venezuela
 
  • Dependencias Federales
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 661.; American Mineralogist 28:215-232
Mineral and/or Locality  
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