Monetite Mineral Data

Advertisment

McDougall Minerals sells high-quality mineral specimens from all over the world to collectors of all levels, from beginners to connoisseurs

Adamsminerals.com- Online mineral store front for mineral collectors

Your premier supplier of quality mineral specimens from Southern Africa and the world at large

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 % P₂O₅

Hydrogen 0.74 % H 6.62 % H₂O

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 Newberyite

Comments: Tan coatings of monetite on white newberyite pseudomorphous after struvite crystal.
Location: Mono Lake, Mono County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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 - PinacoidalH-M Symbol ( 1) Space Group: P1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.96(1), 3.35(0.75), 3.37(0.7),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Catti M , Ferraris G , Filhol A , Acta Crystallographica, Section B , 33 (1977) p.1223-1229, Hydrogen bonding in the crystalline state. CaHPO4 (monetite),, P-1 or P1? A novel neutron diffraction study, Locality: Synthetic

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:

PE_Monetite= 4.70 barns/electron
U=PE_Monetite x rElectron 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 :

A Bijoux Google Search for Monetite
Adam's Minerals Google Search for Monetite
Cape Minerals Google Search for Monetite
Dakota Matrix Minerals Google Search for Monetite
Excalibur Mineral Corp. Google Search for Monetite
Exceptional Minerals Google Search for Monetite
John Betts Fine Minerals Search for Monetite
McDougall Minerals Google Search for Monetite
Mineral News Website Link
Rock and Mineral Shows Google Search for Monetite
Weinrich Minerals, Inc. Google Search 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 Español

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: