...C. L. Christ Abstract Inyoite is monoclinic, P 2 i /a, a 0 = 10.63, b 0 = 12.06, c 0 =8.40 5 Å, β = 114°02′. 2CaO·3B 2 O 3 ·9H 2 O is triclinic P I , a 0 = 7.04 6 , b 0 = 9.45 2 , c 0 = 7.41 2 Å, α = 101°21′, β = 101°19′, γ=99°49′. The findings of Switzer in Palache (1938) for meyerhofferite...

...Charles Palache Abstract The calcium borate meyerhofferite was first described by W. T. Schaller (1916) and nothing has since been published concerning its crystal form. Numerous specimens of this and other borates were collected at the original locality by W. F. Foshag and F. A. Gonyer in 1930...

... Argentina. The mineral occurs as mm-sized white fibroradial aggregates consisting of fine acicular colorless crystals up to 30 μm wide and up to 5 mm long, associated with colemanite, hydroboracite, ulexite, inyoite, gypsum and anhydrite, with minor meyerhofferite, nobleite, gowerite, inderborite, inderite...

... complexes are developed for the structural units [B 3 O 3 (OH) 5 ] 2− , [B 4 O 5 (OH) 4 ] 2− and [B 6 O 7 (OH) 6 ] 2− , and these predictions are in accord with the chemical compositions of inderite, inderborite, inyoite, meyerhofferite, tincalconite, borax, hungchaoite, rivadavite, mcallisterite, admontite...

..., 1994 ; Helvaci and Alonso, 2000 ; Zheng et al. , 2005 ; García-Veigas and Helvacı, 2013 ). Other borate minerals, such as inderborite, meyerhofferite, inyoite and tertschite, are often found in smaller weight fractions alongside these main minerals. Due to their low production cost, hydrated...

..., chlorite, and zeolites (mainly heulandite) during diagenesis. Colemanite and ulexite predominate in both borate zones, but other borates, including howlite, probertite, and hydroboracite are present in the lower borate zone; whereas inyoite, meyerhofferite, pandermite, tertschite (?), hydroboracite...

... of colemanite and priceite veins in altered basaltic rocks of the Furnace Creek formation of late Tertiary age. The new mineral is associated with ulexite, gowerite, meyerhofferite, colemanite, several undescribed borates, ginorite, sassolite, a manganese oxide mineral, and gypsum. Nobleite is biaxial (+), α...

... – 436 . Burns , P.C. & Hawthorne , F.C. ( 1993 a): Hydrogen bonding in colemanite: an X-ray and structure energy study . Can. Mineral . 31 , 297 – 304 . Burns , P.C. & Hawthorne , F.C. ( 1993 b): Hydrogen bonding in meyerhofferite: an X-ray and structure energy...

... – 5301 , https://doi.org/10.1111/jace.17185 . Comboni , D. , Pagliaro , F. , Gatta , G.D. , Lotti , P. , Battiston , T. , Garbarino , G. , and Hanfland , M. ( 2020b ) High-pressure behaviour and phase stability of Ca 2 B 6 O 6 (OH) 10 ·2(H 2 O) (meyerhofferite...

..., and meyerhofferite, form chains in kernite, probertite and colemanite, and a framework in low boracite. In howlite, the borosilicate complex is also connected into a framework. The alkali and alkaline earth cation polyhe-dra and hydrogen bonding from OH groups and attached water molecules provide the cohesion...

... [001]. The specimen comes from the Kramer Deposit, Mohave desert, Kern County, California, in which probertite coexists with other borates [e.g., borax, colemanite, hydroboracite, inderite, inyoite, kernite, kurnakovite, meyerhofferite, searlesite, tincalconite, tunellite, and ulexite ( Noble 1926...

... with colemanite in some deposits ( Table 1 ). Table 1 Borate Mineral Structural Formulas Mineral Formula [3] B: [4] B Colemanite Ca[B 3 O 4 (OH) 3 ] · H 2 O, Z = 4 1:2 Meyerhofferite Ca[B 3 O 3 (OH) 5 ] · H 2 O, Z = 2 1:2 Inyoite Ca[B 3 O 3 (OH) 5 ] · 4H 2 O, Z = 4 1:2...

... ulexite, and the minor occurrences of meyerhofferite, tunellite and the Mg borates. Field studies, stratigraphic observations, facies analysis and sampling were carried out at outcrops and mine galleries in the Kırka borate deposit. Two sections were studied sedimentologically, petrographically...

... vu ) in veins in olivine basalt and “basaltic sandstone” in the Furnace Creek district, Death Valley, California. These veins are exposed to carbonate-saturated rainwater, which reacts with colemanite and priceite to form inyoite ([B 3 O 3 (OH) 5 ] 2− , 0.38 vu ), meyerhofferite ([B 3 O 3 (OH) 5...

...) Meyerhofferite Ca[B 3 O 3 (OH) 5 ](H 2 O) P 1 1914 1907 Burns and Hawthorne (1993b) Meyerhoffer and van't Hoff (1907) ; Christ and Clark (1960) ; Clark and Christ (1960) ; Clark et al. (1964) Nifontovite Ca 3 [B 3 O 3 (OH) 6 ] 2 (H 2 O) 2 B 2/ b 1961 – Egorov-Tismenko et al. (1973a...

.... Consider meyerhofferite, {Ca (H 2 O) 0 (H 2 O) 1 } [ [3] B [4] B 2 O 3 (OH) 5 ] ( Burns & Hawthorne 1993 ). The modified charge of the structural unit is [3 × 3 − 3 × 2 − 5 × 1 − h × 5] = 3.0 − (setting h = 0.20 vu , the average strength of a hydrogen bond; Brown 1981 ). The average basicity...

... [B 4 O 4 (OH) 6 ] 4  · 15H 2 O Pca 2 1 0 Cooper et al. (2010) 1.549 218.441 7.140 4026.707 39 – Ca 2 [B 5 O 8 (OH)] 2 B(OH) 3  · H 2 O   2 Yamnova et al. (2009) 1.635 68.665 5.392 226.477 40 Meyerhofferite Ca[B 3 O 3 (OH) 5 ]·H 2 O   0 Burns & Hawthorne (1993...

... 2 O) 15 . It was discovered at the Santa Rosa mine, a Tertiary borate deposit in Sijes, Salta, northwestern Argentina ( Galliski et al . 2010 ), where it is associated with colemanite, hydroboracite, ulexite, inyoite, gypsum and anhydrite, and minor meyerhofferite, nobleite, gowerite, inderborite...

...) is shown in Figure 8 . All solids are in equilibrium with saturated solution. The meta-stable fields of tincalconite (Na 2 B 4 O 7 ·5H 2 O) and meyerhofferite (Ca 2 B 6 O 11 ·7H 2 O) are delineated with dashed lines. The system is open with respect to water, sodium, and calcium, but closed with respect...