Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (2 online) Mindat Auctions

Ammonioborite

Big Photo

Larderello, Pomarance, Pisa Province, Tuscany, Italy
© Sergey Vasiliev

Formula:
(NH
 
4
)
 
2
[B
 
5
O
 
6
(OH)
 
4
]
 
2
 · H
 
2
O
System:MonoclinicColour:White; colourless in ...
Name:In allusion to the composition, containing AMMONIum and being a BORate.
Dimorph of:Larderellite
This page provides mineralogical data about Ammonioborite.

Classification of Ammonioborite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:5/H.15-10
Nickel-Strunz 10th (pending) edition ID:6.EA.15

6 : BORATES
E : Pentaborates
A : Neso-pentaborates
Dana 8th edition ID:26.5.3.1

26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
5 : Pentaborates
Hey's CIM Ref.:9.1.15

9 : Borates
1 : Borates of the alkalis and boric acid
mindat.org URL:http://www.mindat.org/min-204.html
Please feel free to link to this page.

Type Occurrence of Ammonioborite

Type Locality:Larderello, Pomarance, Pisa Province, Tuscany, Italy
Year of Discovery:1931
Geological Setting of type material:Boric acid fumaroles in a volcanic region.
Associated Minerals at type locality:
SassoliteLarderellite

Physical Properties of Ammonioborite

Diaphaneity (Transparency):Translucent
Colour:White; colourless in transmitted light
Cleavage:None Observed

Crystallography of Ammonioborite

Crystal System:Monoclinic
Cell Parameters:a = 25.27Å, b = 9.65Å, c = 11.56Å
β = 94.29°
Ratio:a:b:c = 2.619 : 1 : 1.198
Unit Cell Volume:V 2,811.07 ų (Calculated from Unit Cell)
Morphology:Compact, fine-grained masses. Partially as platy microscopic crystals, frequently grouped in parallel position.

Optical Data of Ammonioborite

Type:Biaxial (+)
RI values: nα = 1.470 nβ = 1.487 nγ = 1.540
2V:Measured: 60° , Calculated: 62°
Maximum Birefringence:δ = 0.070

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:relatively weak

Chemical Properties of Ammonioborite

Formula:
(NH
 
4
)
 
2
[B
 
5
O
 
6
(OH)
 
4
]
 
2
 · H
 
2
O
Essential elements:B, H, N, O
All elements listed in formula:B, H, N, O

Relationship of Ammonioborite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
6.EA.05Sborgite
Na[B
 
5
O
 
6
(OH)
 
4
] · 3H
 
2
O
6.EA.05IMA2007-047
Pb
 
2
[B
 
5
O
 
9
]Cl·0.5H
 
2
O
6.EA.10Santite
K[B
 
5
O
 
6
(OH)
 
4
] · 2H
 
2
O
6.EA.10Ramanite-(Rb)
Rb[B
 
5
O
 
6
(OH)
 
4
]·2H
 
2
O
6.EA.10Ramanite-(Cs)
Cs[B
 
5
O
 
6
(OH)
 
4
]·2H
 
2
O
6.EA.25Ulexite
NaCa[B
 
5
O
 
6
(OH)
 
6
] · 5H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
9.1.1Sassolite
H
 
3
BO
 
3
9.1.2Metaborite
HBO
 
2
9.1.3Diomignite
Li
 
2
[B
 
4
O
 
7
]
9.1.4Biringuccite
Na
 
2
B
 
5
O
 
8
(OH)·H
 
2
O
9.1.5Nasinite
Na
 
4
B
 
10
O
 
17
·5H
 
2
O
9.1.6Kernite
Na
 
2
[B
 
4
O
 
6
(OH)
 
2
] · 3H
 
2
O
9.1.7Ezcurrite
Na
 
4
B
 
10
O
 
17
·7H
 
2
O
9.1.8Tincalconite
Na
 
2
[B
 
4
O
 
7
] · 5H
 
2
O
9.1.9Borax
Na
 
2
[B
 
4
O
 
7
] · 10H
 
2
O
9.1.10Ameghinite
Na(H
 
4
B
 
3
O
 
7
)
9.1.11Sborgite
Na[B
 
5
O
 
6
(OH)
 
4
] · 3H
 
2
O
9.1.12Aristarainite
Na
 
2
MgB
 
12
O
 
20
·8H
 
2
O
9.1.13Santite
K[B
 
5
O
 
6
(OH)
 
4
] · 2H
 
2
O
9.1.14Larderellite
(NH
 
4
)B
 
5
O
 
6
(OH)
 
4
9.1.16Rhodizite
(K,Cs)Al
 
4
Be
 
4
(B,Be)
 
12
O
 
28

Other Names for Ammonioborite

Other Languages:
German:Ammonioborit
Spanish:Ammonioborita

Other Information

Other Information:Slowly and completely soluble in cold water.
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Ammonioborite

Reference List:Sborgi and Meccacci (1916) Reale accademia nazionale dei Lincei, Rome, Att.: 25: 455.

Schaller (1931) American Mineralogist: 16: 114.

D'Achiardi (1932) Periodico de Mineralogia-Roma: 3: 36.

Schaller (1933) American Mineralogist: 18: 480.

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: 366-367.

American Mineralogist (1959): 44: 1150-1158.

Science: 171: 377-379.

Articles/Blogs about Ammonioborite

Internet Links for Ammonioborite

Search Engines:
  • Look for Ammonioborite on Google
  • Look for Ammonioborite images on Google
    • External Links:
  • Look for Ammonioborite on Webmineral
  • Look for Ammonioborite on Athena Mineralogy
  • Look for Ammonioborite on Wikipedia
  • Look for Ammonioborite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Ammonioborite in the Natural History Museum (London) online catalogue
  • Ammonioborite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • Top quality minerals from Kristalle of California
  • Rare and Unusual minerals at Mineralogical Research Company
  • High-end worldwide specimens & outstanding customer service
  • rare and unusual minerals mainly crystallized
  • Search for - Ammonioborite - on e-Rocks Mineral Sales & Auctions
  • Find Ammonioborite on www.crystalclassics.co.uk
  • Wendel Minerals - Auktion & Shop
  • Search for Ammonioborite at Thames Valley Minerals
  • Lapis Mineral Magazin
  • Buy minerals from Mineralium.com
  • Buy Fine Minerals from mineralsweb.com
  • Buy from David K Joyce minerals
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

    Sponsorship:This page is currently not sponsored. Click here to sponsor this page.

    Localities for Ammonioborite

    (TL) indicates type locality. ? 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.
    Italy
     
    • Tuscany
      • Pisa Province
        • Pomarance
    		D'Achiardi G. (1932): Considerazioni e ricerche sulla larderellite, ammonioborite (?) e bechilite (?) di Larderello (Pisa). Periodico di Mineralogia - Roma pp. 36-42; 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: 366.
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    Copyright © Jolyon & Ida Ralph 1993-2008. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register.