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Sassolite

A valid IMA mineral species - grandfathered
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About SassoliteHide

06592200014951802598390.jpg
View of the Sasso Pisano soffioni area, ca. 1920.

Sasso Pisano, Castelnuovo di Val di Cecina, Pisa Province, Tuscany, Italy
Formula:
H3BO3
Colour:
White to grey, occasionally colourless, yellow or brown
Lustre:
Pearly
Hardness:
1
Specific Gravity:
1.46 - 1.5
Crystal System:
Triclinic
Name:
Named after its discovery locality, Sasso, Tuscany, Italy.
This page provides mineralogical data about Sassolite.


Unique IdentifiersHide

Mindat ID:
3540
Long-form identifier:
mindat:1:1:3540:4
GUID
(UUID V4):
3fb80a04-749c-4a49-aa8b-47dde02c41fe

IMA Classification of SassoliteHide

Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
B(OH)3

Classification of SassoliteHide

6.AA.05

6 : BORATES
A : Monoborates
A : BO3, without additional anions; 1(D).
24.3.1.1

24 : ANHYDROUS BORATES
3 : AmBn[XO3]p
9.1.1

9 : Borates
1 : Borates of the alkalis and boric acid

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
SsoIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of SassoliteHide

Pearly
Transparency:
Transparent
Colour:
White to grey, occasionally colourless, yellow or brown
Streak:
White
Hardness:
Cleavage:
Perfect
{001} micaceous
Density:
1.46 - 1.5 g/cm3 (Measured)    1.48 g/cm3 (Calculated)

Optical Data of SassoliteHide

Type:
Biaxial (-)
RI values:
nα = 1.340 nβ = 1.456 nγ = 1.459
2V:
Measured: 5° , Calculated: 16°
Max Birefringence:
δ = 0.119
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
none
Optical Extinction:
X almost ⊥ {001}; OAP nearly ‖ b and ⊥ {001}.

Chemistry of SassoliteHide

Mindat Formula:
H3BO3

Crystallography of SassoliteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 7.02 Å, b = 7.06 Å, c = 6.59 Å
α = 103.65°, β = 101.11°, γ = 59.98°
Ratio:
a:b:c = 0.994 : 1 : 0.933
Unit Cell V:
273.72 ų (Calculated from Unit Cell)
Morphology:
Tabular crystals {001}, pseudohexagonal in development; rarely needle-lke [001]. Usually small scales; grouped in stalactitic forms at times. Coatings.
Twinning:
Common on twin axis [001].

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0009809SassoliteGajhede M, Larsen S, Rettrup S (1986) Electron density of orthoboric acid determined by X-ray diffraction at 105 K and ab initio calculations Acta Crystallographica B42 545-5521986synthetic0293
0018735SassoliteZachariasen W H (1934) The crystal lattice of boric acid, BO3H3 Zeitschrift fur Kristallographie 88 150-1611934synthetic0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

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Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.
Powder Diffraction Data:
d-spacingIntensity
3.18 Å(100)
6.02 Å(10)
1.590 Å(10)
5.89 Å(<10)
4.59 Å(<10)
4.20 Å(<10)
4.04 Å(<10)
Comments:
Furnace Creek district, California, USA. The data are from Allen and Kramer (1957).

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Near-surface Processes
25 : Evaporites (prebiotic)
Stage 7: Great Oxidation Event<2.4
45b : [Other oxidized fumarolic minerals]
Stage 10b: Anthropogenic minerals<10 Ka
55 : Anthropogenic mine minerals
57 : Other minerals formed by human processes

Type Occurrence of SassoliteHide

Place of Conservation of Type Material:
Museum für Naturkunde, Humboldt-Universität-Berlin, Germany, 1997-4022.

Synonyms of SassoliteHide

Other Language Names for SassoliteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
2 photos of Sassolite associated with RealgarAs4S4
1 photo of Sassolite associated with Barberiite(NH4)[BF4]
1 photo of Sassolite associated with SulphurS8
1 photo of Sassolite associated with ClinometaboriteHBO2
1 photo of Sassolite associated with MetaboriteHBO2

Related Minerals - Strunz-mindat GroupingHide

6.AA.15NordenskiöldineCaSn4+[BO3]2Trig. 3 : R3
6.AA.15TusioniteMn2+Sn4+[BO3]2Trig. 3 : R3
6.AA.35Jimboite(Mn2+,Mg)3[BO3]2Orth. mmm (2/m 2/m 2/m)
6.AA.35KotoiteMg3[BO3]2Orth. mmm (2/m 2/m 2/m) : Pnnm
6.AA.40TakedaiteCa3[BO3]2Trig. 3m (3 2/m) : R3c

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for SassoliteHide

References for SassoliteHide

Reference List:

Localities for SassoliteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Australia
 
  • South Australia
    • Eyre Peninsula
      • Middleback Range
        • Iron Knob
Pring et al. (2000)
Chile
 
  • Antofagasta
    • El Loa Province
TESIS PARA OPTAR AL GRADO DE MAGÍSTER ...
Inostroza et al. (2020)
  • Arica y Parinacota
    • Parinacota Province
Inostroza et al. (2020)
Germany
 
  • North Rhine-Westphalia
    • Cologne
      • Aachen
        • Alsdorf
Sindern et al. (2005) +1 other reference
India
 
Walter Schumann (2008)
Italy
 
  • Campania
    • Naples
      • Pozzuoli
Scacchi (1849)
Russo et al. (2017)
      • Somma-Vesuvius Complex
Russo
Russo et al. (2004)
Pelloux (1927) +1 other reference
  • Sicily
    • Metropolitan City of Messina
      • Eolie Islands (Aeolian Islands)
        • Lipari
          • Vulcano Island
HOLLAND et al. (1881) +1 other reference
            • Porto Levante
              • Faraglioni di Levante
HOLLAND
  • Tuscany
    • Pisa Province
      • Castelnuovo di Val di Cecina
Allen et al. (1957)
      • Pomarance
Palache et al. (1951) +1 other reference
Japan
 
  • Hokkaidō Prefecture
    • Iburi Subprefecture
      • Usu District
Okamoto collection (curated at the Geological Survey museum, Japan)
  • Kagoshima Prefecture
    • Kagoshima District
      • Mishima village
Okano (1962)
          • Iodake (Iwodake; Ioudake)
Okano (1962)
Mozambique
 
  • Zambezia Province
    • Gilé District
      • Muiane-Naipa group
Thomas et al. (2010) +1 other reference
Nicaragua
 
  • León Department
Quisefit et al. (1989)
Russia
 
  • Kamchatka Krai
    • Yelizovsky District
[Der Aufschluss 1995:4 p163-180] +1 other reference
[Der Aufschluss 1995:4 p.163-180]
  • Sakhalin Oblast
    • Kuril Islands (Kurile Islands)
      • Severo-Kurilsky District
        • Paramushir Island
Shevko et al. (2018)
  • Zabaykalsky Krai
    • Aginsky District
Thomas et al. (2009)
Tajikistan
 
  • Gorno-Badakhshan
    • Rangkul' Highlands
Thomas et al. (2010)
USA
 
  • California
    • Inyo County
      • Furnace Creek
Van Nostrand Reinholt Press: 238 +1 other reference
Van Nostrand Reinholt Press: 238. +1 other reference
        • Ryan
          • Biddy McCarthy Mines
- (n.d.)
        • Twenty Mule Team Canyon
Van Nostrand Reinholt Press: 238. +5 other references
Erd et al. (1979)
    • Kern County
      • Boron
Cal Div of Mines & Geology "Mineral ...
Van Nostrand Reinholt Press: 238. +4 other references
Van Nostrand Reinholt Press: 238. +4 other references
Donald E. Garrett (1998)
          • West Baker
    • Lake County
      • East Mayacmas Mining District
        • Cobb
Van Nostrand Reinholt Press: 238. +3 other references
      • Sulphur Creek Mining District (Sulfur Creek Mining District; Wilbur Springs Mining District)
        • Clear Lake Oaks
    • Sonoma County
      • West Mayacmas Mining District
Van Nostrand Reinholt Press: 239 +3 other references
    • Tehama County
      • Bend
Van Nostrand Reinholt Press: 239. +2 other references
  • Nevada
    • Washoe County
      • Steamboat Springs Mining District
Castor et al. (2004)
Vietnam
 
  • Yên Bái Province
    • Lục Yên District
Le Thi-Thu Huong (2017) +2 other references
 
Mineral and/or Locality  
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