Porosity — Co-Ca Phosphonate Showing Humidity-Sensitive Single Crystal to Single Crystal Structural Transformation and Tunable Proton Conduction Properties

Measurement evidence

Porosity

Co-Ca Phosphonate Showing Humidity-Sensitive Single Crystal to Single Crystal Structural Transformation and Tunable Proton Conduction Properties · Bao S.-S., Li N.-Z., Taylor J.M. et al. · Chemistry of Materials · 2015 · 8116-8125

1 measurement group · 12 results

Reported values remain attached to the sample, method, conditions, extraction quality and source location that produced them.

Water vapour adsorption/desorption isotherms by BELSORP-max

Gas sorption and porosity

CoCa.nH2O powder for water adsorption/desorption · Powder

Activated CoCa.nH2O measured at 15, 25 and 35 C; 25 C isotherm described in detail over 0-97% RH.

Temperature: 288 K, 298 K, 308 K
Atmosphere: Water vapour at controlled relative humidity
Context: pristine framework hydration/dehydration
Measurement source: main p.5, article p.8120 · Water Adsorption/Desorption Isotherms · Figure 2c-d; SI Figure S4

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Water adsorption formation of CoCa.2H2O at 25 C	4.0 H2O per formula unit at 7% RH	—	—	Text Rounded Reported	main p.5, article p.8120 · Water Adsorption/Desorption Isotherms · Figure 2c
Water adsorption formation of CoCa.3H2O at 25 C	5.0 H2O per formula unit at 64% RH	—	—	Text Rounded Reported	main p.5, article p.8120 · Water Adsorption/Desorption Isotherms · Figure 2c
Water adsorption formation of CoCa.4H2O at 25 C	6.0 H2O per formula unit at 94% RH; CoCa.4H2O formed at 95% RH	—	—	Text Rounded Reported	main p.5, article p.8120 · Water Adsorption/Desorption Isotherms · Figure 2c
Water adsorption first step uptake at 25 C	1.0 H2O per formula unit at 3% RH	—	—	Text Rounded Reported	main p.5, article p.8120 · Water Adsorption/Desorption Isotherms · Figure 2c
Water adsorption second step uptake at 25 C	2.0 H2O per formula unit at 4% RH	—	—	Text Rounded Reported	main p.5, article p.8120 · Water Adsorption/Desorption Isotherms · Figure 2c
Water desorption CoCa.2H2O hysteresis state at 25 C	4.0 H2O per formula unit at 3% RH	—	—	Text Rounded Reported	main p.5, article p.8120 · Water Adsorption/Desorption Isotherms · Figure 2c
Water desorption CoCa.3H2O hysteresis state at 25 C	5.0 H2O per formula unit at 62% RH	—	—	Text Rounded Reported	main p.5, article p.8120 · Water Adsorption/Desorption Isotherms · Figure 2c
Average differential heat of water adsorption	50.8 kJ mol-1 in 2.0-6.0 water coverage range	—	—	Caption Rounded Reported	SI p.S8 · Figure S4 caption · Figure S4
Average differential heat of water desorption	58.0 kJ mol-1 in 6.0-4.2 water coverage range	—	—	Caption Rounded Reported	SI p.S8 · Figure S4 caption · Figure S4
Critical RH at 15 C adsorption	57% RH	—	—	Text Rounded Reported	main p.5, article p.8120 · Water Adsorption/Desorption Isotherms · Figure 2d; SI Figure S4
Critical RH at 25 C adsorption	62% RH	—	—	Text Rounded Reported	main p.5, article p.8120 · Water Adsorption/Desorption Isotherms · Figure 2d; SI Figure S4
Critical RH at 35 C adsorption	67% RH	—	—	Text Rounded Reported	main p.5, article p.8120 · Water Adsorption/Desorption Isotherms · Figure 2d; SI Figure S4