Esperanzaite Mineral Data (original) (raw)

General Esperanzaite Information

Help on Chemical Formula: Chemical Formula:

NaCa2Al2(As+++++O4)2F4(OH)•2(H2O)

Help on Composition: Composition:

Molecular Weight = 563.98 gm

Sodium 4.08 % Na 5.49 % Na2O

Calcium 14.21 % Ca 19.89 % CaO

Aluminum 9.57 % Al 18.08 % Al2O3

Arsenic 26.57 % As 40.75 % As2O5

Hydrogen 0.89 % H 7.99 % H2O

Oxygen 31.21 % O

Fluorine 13.47 % F 13.47 % F

- % F -5.67 % -O=F2

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

NaCa2Al2(AsO4)2F4(OH)•2(H2O)

Help on Environment: Environment:

Found as a secondary phase on mineralized rhyolite.

Help on IMA Status: IMA Status:

Approved IMA 1999 (Dana # Added)

Help on Locality: Locality:

La Esperanza mine, Zaragosa mining district, near Madero, State of Durango, Mexico. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named after the discovery locality.

Help on Name Pronunciation: Name Pronunciation:

Esperanzaite + Pronunciation Say ESPERANZAITE

Help on Synonym: Synonym:

IMA1998-025

Esperanzaite Image

Click Here for Larger Esperanzaite Image in a New Browser Window Images:

Esperanzaite Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =0.9022:1:0.5171

Help on Cell Dimensions: Cell Dimensions:

a = 9.687, b = 10.737, c = 5.5523, Z = 2; beta = 105.32° V = 556.97 Den(Calc)= 3.36

Help on Crystal System: Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/m

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 2.966(1), 2.7(0.9), 3.527(0.9),3.801(0.8), 4.796(0.8), 5.364(0.8),

Click Here for Large Esperanzaite Structure Window 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

| | Foord E E , Hughes J M , Cureton F E , Maxwell C H , Falster A U , Sommer A J , Hlava P F , The Canadian Mineralogist , 37 (1999) p.67-72, Esperanzaite, NaCa2Al2(AsO4)2F4(OH).2H2O, a new mineral species from, the La Esperanza mine, Mexico: Descriptive mineralogy and atomic arrangement, Locality: La Esperanza mine, Mexico | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Physical Properties of Esperanzaite

Help on Cleavage: Cleavage:

{100} Perfect

Help on Color: Color:

Blue green.

Help on Density: Density:

3.24

Help on Diaphaneity: Diaphaneity:

Transparent to Translucent

Help on Fracture: Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Help on Habit: Habit:

Botryoidal - "Grape-like" rounded forms (e.g.. malachite).

Help on Habit: Habit:

Spherical - Spherical, rounded aggregates.

Help on Hardness: Hardness:

4.5 - Between Fluorite and Apatite

Help on Luster: Luster:

Vitreous (Glassy)

Help on Streak: Streak:

white

Optical Properties of Esperanzaite

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= 0.042 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.076 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1747,KPDmeas= 0.1812,KC= 0.1891
Ncalc = 1.61 - 1.64

Help on Optical Data: Optical Data:

Biaxial (-), a=1.58, b=1.588, g=1.593, bire=0.0130, 2V(Calc)=76, 2V(Meas)=74. Dispersion r < v moderate.

Calculated Properties of Esperanzaite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=3.13 gm/cc
note: Specific Gravity of Esperanzaite =3.24 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.0003429976
Boson Index = 0.9996570024

Help on Photoelectric: Photoelectric:

PEEsperanzaite = 20.08 barns/electron
U=PEEsperanzaite x rElectron Density= 62.74 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Esperanzaite is Not Radioactive

Esperanzaite Classification

Help on Dana Class: Dana Class:

42.04.02.02 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.04)where (AB)5 (XO4)2 Zq � x(H2O)

(42.04.02)Morinite Group

42.04.02.01 Morinite NaCa2Al2(PO4)2(F,OH)5•2(H2O) P 21/m 2/m

42.04.02.02 Esperanzaite! NaCa2Al2(AsO4)2F4(OH)•2(H2O) P 21/m 2/m

Help on Strunz Class: Strunz Class:

08.DM.05 08 - PHOSPHATES, ARSENATES, VANADATES

08.D - Phosphates, etc

08.DM -With large and medium-sized cations, (OH, etc.):RO4 > 2:1

08.DM.05 Morinite NaCa2Al2(PO4)2(F,OH)5•2(H2O) P 21/m 2/m

08.DM.05 Esperanzaite! NaCa2Al2(AsO4)2F4(OH)•2(H2O) P 21/m 2/m

Other Esperanzaite Information

Help on References: References:

NAME( CanMin 8/99) PHYS. PROP.(CanMin, 2/99) OPTIC PROP.(CanMin, 2/99)

Help on See Also: See Also:

Links to other databases for Esperanzaite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

Search for Esperanzaite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Esperanzaite :

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

Ask about Esperanzaite 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 Esperanzaite Specimen Label here :

Esperanzaite

NaCa2Al2(As+++++O4)2F4(OH)•2(H2O)
Dana No: 42.04.02.02 Strunz No: 08.DM.05
Locality:

Notes: