Monetite Mineral Data
General Monetite Information
Chemical Formula:
CaHPO4
Composition:
Molecular Weight = 136.06 gm
Calcium 29.46 % Ca 41.22 % CaO
Phosphorus 22.77 % P 52.16 % P2 O5
Hydrogen 0.74 % H 6.62 % H2 O
Oxygen 47.04 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
Ca(HPO4 )
Environment:
Coatings and cements resulting from guano-induced phosphatization of sedimentary rocks; a coating on phosphate minerals in granite pegmatite.
IMA Status:
Valid Species (Pre-IMA) 1882
Locality:
On Monito (Moneta), Mona, Los Monges, and Aruba Islands, West Indies, Caribbean Sea. Link to MinDat.org Location Data.
Name Origin:
Named for Moneta (now Monito) Island, which contains a notable occurrence.
Name Pronunciation:
Monetite
Synonym:
ICSD 917
PDF Sep-80
Monetite Image
Images:
Monetite Crystallography
Axial Ratios:
a:b:c =0.9857:1:0.95
Cell Dimensions:
a = 6.9, b = 7, c = 6.65, Z = 4; alpha = 96.35°, beta = 91.267°, gamma = 76.1° V = 309.80 Den(Calc)= 2.92
Crystal System:
Triclinic - Pinacoidal H-M Symbol ( 1 ) Space Group: P1
X Ray Diffraction:
By Intensity(I/Io ): 2.96(1), 3.35(0.75), 3.37(0.7),
Physical Properties of Monetite
Cleavage:
{???} Indistinct, {???} Indistinct, {???} Indistinct
Color:
Colorless, White, Light yellow.
Density:
2.929
Diaphaneity:
Transparent to Translucent
Fracture:
Brittle - Uneven - Very brittle fracture producing uneven fragments.
Hardness:
3.5 - Copper Penny
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Monetite
Gladstone-Dale:
CI meas = -0.026 (Excellent) - where the CI = (1-KPDmeas /KC ) CI calc = -0.029 (Excellent) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.2104,KPDmeas = 0.2097,KC = 0.2045 Ncalc = 1.6
Optical Data:
Biaxial (+/-), a=1.587-1.6, b=1.614, g=1.631-1.64, bire=0.0400-0.0440, 2V(Calc)=74, 2V(Meas)=70.
Calculated Properties of Monetite
Electron Density:
Bulk Density (Electron Density)=2.93 gm/cc note: Specific Gravity of Monetite =2.93 gm/cc.
Fermion Index:
Fermion Index = 0.0006245555 Boson Index = 0.9993754445
Photoelectric:
PEMonetite = 4.70 barns/electronU=PEMonetite x r Electron Density= 13.77 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Monetite is Not Radioactive
Monetite Classification
Dana Class:
37.01.01.01 (37) Anhydrous Acid Phosphates, etc
(37.01) with miscellaneous formulae
(37.01.01) Dana Group
37.01.01.01 Monetite CaHPO4 P1 1
37.01.01.02 Weilite CaHAsO4 P1 1
Strunz Class:
08.AD.10 08 - PHOSPHATES, ARSENATES, VANADATES
08.A - Phosphates, etc. without additional anions, without H2O
08.AD -With only large cations
08.AD.10 Monetite CaHPO4 P1 1
08.AD.10 Weilite CaHAsO4 P1 1
08.AD.10 Svenekite ! Ca(H2AsO4)2 P1 1
Other Monetite Information
References:
NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
See Also:
Links to other databases for Monetite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST
Search for Monetite using:
[AOL ]
[Bing ]
[Dog Pile ]
[GeoScienceWorld ]
[HotBot ]
[Ixquick ]
[Lycos ]
[MAMMA ]
[Scirus ]
[Teoma ]
[WebCrawler ]
[Wikipedia ]
[YAHOO ]
Visit our Advertisers for Monetite :
Ask about Monetite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in
Espa�ol
Print or Cut-and-Paste your Monetite Specimen Label here :
Monetite
CaHPO4
Dana No: 37.01.01.01 Strunz No: 08.AD.10
Locality:
Notes:
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.