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Sassolite

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Formula:
H
 
3
BO
 
3
System:TriclinicColour:White to grey, ...
Lustre:PearlyHardness:1
Name:Named after its discovery locality, Sasso, Tuscany, Italy.
This page provides mineralogical data about Sassolite.

Classification of Sassolite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:4/F.01-10
Nickel-Strunz 10th (pending) edition ID:6.AA.05

6 : BORATES
A : Monoborates
A : BO3, without additional anions; 1(D).
Dana 8th edition ID:24.3.1.1

24 : ANHYDROUS BORATES
3 : AmBn[XO3]p
Hey's CIM Ref.:9.1.1

9 : Borates
1 : Borates of the alkalis and boric acid
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Type Occurrence of Sassolite

Type Locality:Sasso Pisano, Castelnuovo Val di Cecina, Pisa Province, Tuscany, Italy
Year of Discovery:1800

Physical Properties of Sassolite

Lustre:Pearly
Diaphaneity (Transparency):Transparent
Colour:White to grey, occasionally colourless, yellow or brown.
Streak:White
Hardness (Mohs):1
Cleavage:Perfect
{001} micaceous
Density (measured):1.46 - 1.5 g/cm3
Density (calculated):1.48 g/cm3

Crystallography of Sassolite

Crystal System:Triclinic
Class (H-M):1 - Pinacoidal
Space Group:P1
Cell Parameters:a = 7.02Å, b = 7.06Å, c = 6.59Å
α = 103.65°, β = 101.11°, γ = 59.98°
Ratio:a:b:c = 0.994 : 1 : 0.933
Unit Cell Volume: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].
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Horizontal Axis: ° to ° Vertical Axis: % Source Data: Filtered Data:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Sassolite

Type:Biaxial (-)
RI values: nα = 1.340 nβ = 1.456 nγ = 1.459
2V:Measured: 5° , Calculated: 16°
Maximum Birefringence:δ = 0.119

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:none

Chemical Properties of Sassolite

Formula:
H
 
3
BO
 
3
Simplified for copy/paste:H3BO3
Essential elements:B, H, O
All elements listed in formula:B, H, O
Analytical Data:Boric acid.

Relationship of Sassolite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
6.AA.15Nordenskiöldine
CaSn
4+
 
[BO
 
3
]
 
2
6.AA.15Tusionite
Mn
2+
 
Sn
4+
 
[BO
 
3
]
 
2
6.AA.35Jimboite
(Mn
2+
 
,Mg)
 
3
[BO
 
3
]
 
2
6.AA.35Kotoite
Mg
 
3
[BO
 
3
]
 
2
6.AA.40Takedaite
Ca
 
3
[BO
 
3
]
 
2
Related Minerals - Hey's Index Grouping:

- +
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
 
5
)(OH)
 
4
· 8H
 
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
 
7
(OH)
 
2
· H
 
2
O
9.1.15Ammonioborite
(NH
 
4
)
 
2
[B
 
5
O
 
6
(OH)
 
4
]
 
2
· H
 
2
O
9.1.16Rhodizite
(K,Cs)Al
 
4
Be
 
4
(B,Be)
 
12
O
 
28

Other Names for Sassolite

Synonyms:
Boric AcidNative Boracic AcidNative Sedative SaltSal sedativum
Other Languages:
Catalan:Sassolita
Dutch:Sassoliet
French:Acide boracique
Acide borique
German:Sassolin
Borsäure
Sassolit
Italian:Sassolite
Acido borico
Sale sedativo naturale
Latin:Acidum boracis
Polish:Sassolin
Russian:Сассолин
Spanish:Sassolita

Other Information

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 Sassolite

Reference List:

- +
Hofer, U.F. (1778): Memorie sopra il sale sedativo naturale di Toscana e del borace che da quello si compone. Firenze.
Mascagni, P. (1779): Dei lagoni del Senese e del Volterrano. Commentari. Siena.

Klaproth, M.H. (1802): Untersuchung des Sassolins, Beiträge zur chemischen Kenntniss der Mineralkörper, Dritter Band, Rottmann Berlin, 95-101

Karsten, D.L.G. (1808): Mineralogische Tabellen mit Rücksicht auf die neuesten Entdeckungen ausgearbeitet und mit erläuternden Anmerkungen versehen. H. A. Rottmann, Ed., Berlin, 105 pp. [sassolite at page 40].

Haushofer (1884), Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 9: 77.

Zachariasen (1934), Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 88: 150.

Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 662-663.

Zachariasen, W.H. (1954): The precise structure of orthoboric acid. Acta Crystallographica, 7, 305-310.
Smith, R.L. (1958): Some new occurrences of sassolite in the United States. American Mineralogist, 43, 1204-1205.
Grew, E.S. and Anovitz, L. M. (eds) (2002): Boron: Mineralogy, Petrology, and Geochemistry. Reviews in Mineralogy, 33.

Internet Links for Sassolite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Sassolite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
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  • Localities for Sassolite

    The 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.
    (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.
    Australia
     
    • South Australia
      • Eyre Peninsula
        • Middleback Range
          • Iron Knob
    Australian Jour.Min. v.6, no. 1
    Germany
     
    • North Rhine-Westphalia
      • Aachen
        • Alsdorf
    Sindern, S., Warnsloh, J. M., Witzke, T., Havenith, V., Neef, R. & Etoundi, Y. (2005): Mineralogy and geochemistry of vents formed on the burning coal mining waste dump Anna I, Alsdorf, Germany. Eur. J. Mineral. 17, Beih. 1, 130.
    India
     
    • Jammu and Kashmir
    No reference listed
    Italy
     
    • Campania
      • Naples Province
        • Somma-Vesuvius Complex
    Russo, M., 2006: I minerali di formazione fumarolica della grande eruzione vesuviana del 1906
    Russo, M., Punzo, I. (2004): I minerali del Somma-Vesuvio, AMI
    • Sicily
      • Messina Province
        • Eolie Islands (Aeolian Islands)
          • Lipari
            • Vulcano Island
    HOLLAND, 1813. GARAVELLI A., LAVIANO R., VURRO F. (1997): Sublimate deposition from hydrothermal fluids at the Fossa Crater - Vulcano, Italy. - European Journal of Mineralogy - 9, 2, 423-432.
              • Porto Levante
    HOLLAND, 1813.
    • Tuscany
      • Pisa Province
        • Castelnuovo Val di Cecina
    American Mineralogist (1957) 42, 56
        • Pomarance
    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; S. Merlino, F. Sartori: Can. Mineral. 27:159-165 (1970)
    Japan
     
    • Hokkaido
      • Iburi Province
        • Usu-zan
    Okamoto collection (curated at the Geological Survey museum, Japan)
    • Kyushu Region
      • Nansei Archipelago
        • Kagoshima Prefecture
    fumarolic
    Mozambique
     
    • Zambezia Province
      • Alto Ligonha District
    Thomas, R., Davidson, P. (2010): Hambergite-rich melt inclusions in morganite crystals from the Muiane pegmatite, Mozambique and some remarks on the paragenesis of hambergite. - Mineralogy and Petrology, 100, 3-4, 227-23
    Russia
     
    • Far-Eastern Region
      • Kamchatka Oblast'
    [Der Aufschluss 1995:4 p163-180]
    [Der Aufschluss 1995:4 p.163-180]
    Tajikistan
     
    • Viloyati Mukhtori Gorno-Badakhshan (Viloyati Badakhshoni Kuni)
      • Pamir Mts
        • Rangkul' Highlands
    Thomas, R., Davidson, P. (2010): Hambergite-rich melt inclusions in morganite crystals from the Muiane pegmatite, Mozambique and some remarks on the paragenesis of hambergite. - Mineralogy and Petrology, 100, 3-4, 227-23
    USA
     
    • California
      • Inyo Co.
        • Death Valley National Park
          • Furnace Creek District (Furnace Creek Borate District)
            • Black Mts
              • Ryan
              • Twenty Mule Team Canyon
                • Monte Blanco
    Am Min 64:3-4 pp 369-375; Erd, R.C., J.F. McAllister, and G.D. Eberlein (1979) New data on hungchaoite, the second world occurrence, Death Valley region, California. American Mineralogist: 64: 369-375.
            • East Coleman Hills
    Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 238, 254.
            • Twenty Mule Team Canyon
    Allen, Robert D. & Henry C. Kramer (1957), Ginorite and sassolite from Death Valley, California, American Mineralogist: 42: 56-61; Erd, R.C., J.F. McAllister & H. Almond (1959), Gowerite, a new hydrous calcium borate from Death Valley, California: American Mineralogist: 44: 913; Schaller, Waldemar Theodore, et al (1965), American Mineralogist: 65: 629-640; McAllister, James Franklin (1970) Geology of the Furnace Creek borate area, Death Valley, Inyo County, California. California Division of Mines and Geology Map Sheet 14, 9 pp.; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 238.
    Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 238.
          • Black Mts
            • Ryan
    RRUFF Specimen R060496 - http://rruff.info/sassolite/names/asc/R060496
      • Kern Co.
        • Kramer District
          • Boron
    Cal Div of Mines & Geology "Mineral Information Service" V. 22 N. 10 Oct 1969
    Smith, George Irving, Hy Almond, & D.L. Sawyer, Jr. (1958), Sassolite from the Kramer borate district, California: American Mineralogist: 43: 1070; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 327, 333; Morgan, V. and Erd, R.C. (1969) Minerals of the Kramer borate district, California California Division of Mines and Geology Mineral Information Service: 22: 166; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 238.
    Smith, George Irving, Hy Almond, & D.L. Sawyer, Jr. (1958), Sassolite from the Kramer borate district, California: American Mineralogist: 43: 1070; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 327; Morgan, V. and Erd, R.C. (1969) Minerals of the Kramer borate district, California California Division of Mines and Geology Mineral Information Service: 22: 166; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 238.
      • Lake Co.
        • Mayacmas Mts (Mayacamas Mts)
          • East Mayacmas District
            • Cobb
    Veatch, John Allen (1867), Discovery of borax in California, in Browne and Taylor, Mineral resources of the states and territories west of the Mississippi: 180; Bailey, Gilbert E. (1902), The saline deposits of California: California Mining Bureau Bulletin 24: 54; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 238.
        • Sulphur Creek District (Sulfur Creek District; Wilbur Springs District)
          • Clear Lake Oaks
      • Sonoma Co.
        • Mayacmas Mts (Mayacamas Mts)
          • West Mayacmas District
    Smith, Robert Leland (1958), Some new occurrences of sassolite in the United States: American Mineralogist: 43: 1204; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 239; Dunning, G. S. & Cooper, J. F. (1993): History and minerals of The Geysers Sonoma County, California. Mineralogical Record: 24(5): 339-352.
      • Tehama Co.
        • Bend
    Bailey, Gilbert E. (1902), The saline deposits of California: California Mining Bureau Bulletin 24: 69; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 239.
    • Nevada
      • Washoe Co.
        • Steamboat Springs District
    NBMG Spec. Pub. 31 Minerals of Nevada
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