Larderellite Mineral Data

Larderellite Mineral Data
Search Webmineral :
   
Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images       News Help About



[Localities] [Carat Weight] [Special Collections] [Diamond Lots] [Ordering Info]
See Also: [Excalibur Minerals] [Mineral News] [Hudson Institute] [Minerals on CDROM]
Special Collections of Rough Diamonds for Researchers and Collectors
Unparalled diversity of specimens from different locations


General Larderellite Information

Help on Chemical Formula: Chemical Formula: (NH4)B5O6(OH)4
Help on Composition: Composition: Molecular Weight = 236.11 gm
   Boron     22.89 %  B    73.71 % B2O3
   Hydrogen   1.71 %  H      -   % Calc as (NH4)2O
   Hydrogen   1.71 %  H    15.26 % H2O
   Nitrogen   5.93 %  N    11.03 % (NH4)2O
   Oxygen    67.76 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: (NH4)B5O6(OH)4
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1854
Help on Locality: Locality: Lardarello, Val di Cecina, Pisa, Toscana, Italy Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for count Francesco de Larderelle (1848-1925), owner of the "BORAX mine" in Tuscany, Italy
Help on Name Pronunciation: Name Pronunciation: Larderellite + Pronunciation Say LARDERELLITE
 

Larderellite Image

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

Larderellite

Comments: Colorless larderellite crystals.
Location: Larderello, Cecina Valley, Pisa province, Tuscany, Italy. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Larderellite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.6265:1:1.3212
Help on Cell Dimensions: Cell Dimensions: a = 11.63, b = 7.15, c = 9.447, Z = 4; beta = 96.75° V = 780.12 Den(Calc)= 2.01
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.887(1), 2.921(1), 4.7(1),
Click Here for Large Larderellite 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


Merlino S , Sartori F , Acta Crystallographica, Section B , 25 (1969) p.2264-2270, The crystal structure of lardellite, NH4B5O7(OH)2*H2O, Locality: synthetic

 

Physical Properties of Larderellite

Help on Cleavage: Cleavage: {100} Perfect
Help on Color: Color: Yellowish, White.
Help on Density: Density: 1.905
Help on Hardness: Hardness: 1-2 - Between Talc and Gypsum
Help on Streak: Streak: white
 

Optical Properties of Larderellite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.323 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.253 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2637,KPDmeas= 0.2782,KC= 0.2104
Ncalc = 1.4 - 1.42
Help on Optical Data: Optical Data: Biaxial (+), a=1.509, b=1.52, g=1.561, bire=0.0520, 2V(Calc)=56, 2V(Meas)=64.
 

Calculated Properties of Larderellite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.04 gm/cc
note: Specific Gravity of Larderellite =2.01 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.1
Boson Index = 0.9
Help on Photoelectric: Photoelectric: PELarderellite = 0.33 barns/electron
U=PELarderellite x rElectron Density= 0.67 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Larderellite is Not Radioactive
 

Larderellite Classification
Help on Dana Class: Dana Class: 26.05.04.01 (26)Hydrated Borates Containing Hydroxyl or Halogen
  (26.05)Dana Type
  (26.05.04)Dana Group
 
26.05.04.01 Larderellite (NH4)B5O6(OH)4 P 21/a 2/m
Help on Strunz Class: Strunz Class: 06.EB.05 06 - BORATES
  06.E - Pentaborates
  06.EB -Ino-pentaborates
 
06.EB.05 Larderellite (NH4)B5O6(OH)4 P 21/a 2/m
 

Other Larderellite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Larderellite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - MinMax(Deutsch)
12 - MinMax(English)
13 - Mineralienatlas (Deutsch)
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - WWW-MINCRYST

Search for Larderellite using:

Google
 
Web webmineral.com
[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Larderellite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

Excalibur Minerals

Exceptional Minerals

Fabre Minerals

Heliodor

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Larderellite Mineral Data :

Ask about Larderellite 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 Espaņol

Print or Cut-and-Paste your Larderellite Specimen Label here :

Larderellite

(NH4)B5O6(OH)4
Dana No: 26.05.04.01 Strunz No: 06.EB.05
Locality:

 

Notes: